Folks have been known to say that good things come in small packages.  And, do you know what? They’re sometimes right. [Spoiler alert: This review features a good thing which comes in a small package.]

I’ve been in the process of evaluating some pretty complicated pieces of communications equipment lately. So when Sangean approached me a few weeks ago and asked if I would check out their latest FM radio and Bluetooth speaker––a comparatively simple piece of kit––I thought, Well, why not? Because while I prefer “enthusiast grade” radios, sometimes it’s nice to check out something super-simple and purpose-built from a company I’ve grown to trust. Plus, it didn’t hurt that Sangean actually bothered to include FM radio on what would otherwise simply be just another Bluetooth speaker.  Ah, yes; a worthy addition.

Sangean dispatched the sample radio and I received it within a few days. I was expecting something roughly on the scale of a Tivoli Model One.  Instead, when I opened the box, what I found was a radio only slightly larger than my diminutive  Muzen OTR, a little radio that fits the palm of your hand. To be fair, it could only be called…cute.

By my measurements, the tiny Sangean WR-7 is about 2 1/2″ tall, 4 5/8″ wide, and 3″ deep (if you include the tuning knob in that last dimension). It’s mini by almost any standard.

For this photo I placed it next to my handy XHDATA D-808 compact radio.  And here’s how they compare:

Though wee, the WR-7 feels weighty (14.4 oz), solid, and substantial in the hand.

Turns out the chassis is solid––solid wood. Sangean has two options: walnut and black. Of course, my sample is the black version.

And the WR-7 is as simple to operate as it is to…well, hold in your hand. There’s one knob to turn the radio on and select the source (FM, Bluetooth, or the analog AUX input), and another knob for volume.  Just as these photos show.

The tuning knob is the largest knob and moves fluidly across the dial. The analog dial is white with black frequency markings, and is backlit. From my tests, the FM dial is fairly accurate, although the frequency marking steps are a bit odd: 2 or 3 MHz increments starting at 87.5 and ending at 108 MHz.

There is a green LED lamp hidden behind the speaker grill that acts as the FM signal strength indicator. This LED turns blue when in Bluetooth mode.

Performance

There’s not a lot to report on here and, perhaps, that’s why I halted my other evaluations to fit this one in. This radio needs no owner’s manual (though it does ship with one). All you need is a USB charging cable––yep, the same type that likely charges your mobile phone.  And, of course, it ships with one.

You might have noticed that the WR-7 doesn’t have a telescoping whip antenna.  That’s okay, because it also ships with an external wire antenna (which I actually prefer on this type of mini tabletop radio).

The WR-7 has an internal 2600 mAh Lithium-Ion Battery that provides this tiny rig with up to 36 hours of operation between charges. While I haven’t tested this claim yet, I can tell you that its battery life is incredibly good––especially acknowledging that the audio amplifier must be using quite a bit of the battery.

FM

The WR-7 receives the FM broadcast band from 87.5 to 108 MHz.  While the dial is analog, I know there’s a DSP chip inside because I can hear frequency steps while I tune across the band. There is no muting between frequency steps, so the experience of tuning feels somewhat analog. As I mentioned earlier, the dial layout is a little quirky, but overall the frequency markings are pretty close to accurate. I found my benchmark stations with little difficulty.

In terms of sensitivity, the FM receiver is quite good in the WR-7.  I could receive almost all of my local stations with the external FM antenna connected. Of course, you’ll want to connect the FM wire antenna.

With the external antenna connected, I could receive all of my benchmark distant and weak stations as well on the WR-7. While reception is very good, it isn’t quite as good as on my XHDATA D-808, C. Crane CC Skywave SSB, or Tecsun PL-660––the lock isn’t quite as stable––but I probably could have tweaked this by moving the external wire antenna.

Audio fidelity

Thing is, with even a decent FM signal, you’ll be mighty impressed with the audio fidelity of the WR-7. It easily manages to sound like a radio three to four times its size. Truly, the bass that emanates from this tiny speaker is incomprehensibly deep–only limited by the size of the acoustic chamber.

The sound is rich and room-filling when the volume is turned up.

And speaking of turning up the volume, this is one little radio you’ll probably peg at its highest volume setting from time to time. In fact, I rather wish this radio would allow the volume level to reach even a notch higher…but I expect this was a design choice at Sangean. With the volume turned up all the way, the sound is room-filling, but not distorted. While testing the WR-7, I tuned it to a variety of stations and played a wide range of music through it via Bluetooth: I never noticed bass-heavy songs distorting the audio. I suspect if the volume could be increased even further, the audio would indeed distort a bit.

In short: though you might occasionally turn up the volume on the WR-7 all the way, you’ll be pleased with the results––even across the room!

Bluetooth

I’m not sure what to say about Bluetooth; to me this is a technology that seems to work quite well for wireless connections between mobile devices. The WR-7 has built-in Bluetooth Technology Version 4.1, and it worked flawlessly with all of my mobile devices as well as my shack’s PC.

For a full week, I used the WR-7 as the speaker for my shack computer, and it was most impressive. In fact, it makes for a nice compact external speaker to pair with my SDR applications. AM audio, piped through Bluetooth into the WR-7, is a treat.

For a few nights, I even streamed OTR productions of “Buck Rogers in the 25th Century” with my shack computer, connected to the WR-7 via Bluetooth. The WR-7 was actually in the adjoining room, yet the Bluetooth connection was strong and never dropped the audio. The resulting sound was nothing short of amazing: if you closed your eyes, it almost sounded like a valve set from 1939.

And that’s another thing about the WR-7 worth noting: It’s so small and so simple in design, it fits in anywhere, and isn’t in the least obtrusive, all while filling the room with its warm, rich sound.

Summary

Every radio has its pros and cons. When I begin a review of a radio, I take notes from the very beginning so that I don’t forget some of my initial impressions. Here is the list I formed over the time I’ve spent evaluating the WR-7.

Pros: 

• Superb, room-filling, rich audio especially considering its very compact package
• Very good FM sensitivity
• Internal battery powers it for dozens of hours between charges
• Easy to recharge via any 5VDC USB source
• Easy Bluetooth connection and brilliant audio
• Simple operation

Cons:

• Volume and selection knobs could be slightly small for some users’ hands
• Volume range more limited than most, upper volume capped
• Portable size, but would need protection in a suitcase or carry-on bag

Radios like the Sangean WR-7 give me hope that consumer electronics might be heading back in what is, in my humble opinion, the right direction: that is, toward quality.

The WR-7 is really a quality piece of kit: it has a solid feel (imparted by solid wood), has an acoustic chamber that produces excellent audio, and you can tell that the FM receiver wasn’t simply an “add-on” feature, as it works quite well.

While you won’t see many radios like this reviewed on the SWLing Post, I’m glad I agreed to take on this one.  It was an fun exercise, and reminded me why I love doing radio reviews: sometimes these digital marvels really surprise me. That, and I’m enough of a radio and consumer electronics geek to bask in the indulgence of pure listening!

Good one, Sangean! Accolades!

Note: At time of posting, the Sangean WR-7 has not yet hit retailers. I understand that the MSRP will be $99.99, but imagine the actual retail price will be closer to $79.99 once it hits the shelves. I’ll update this review with the actual price and links to retailers once they’re in stock.  Stay tuned for that. 

Many thanks to SWLing Post contributor, Mike Hansgen (K8RAT), who notes that Italian manufacturer, ELAD, has introduced a new speaker, an amplifier and the FDM-S3 SDR is now available to purchase.

The ELAD FDM-S3 was first announced last year, but has only recently started shipping. We know its processing bandwidth is impressive–wide enough to include the entire FM broadcast band! The price is 949.90 EUR.

ELAD has also introduced a matching amplified speaker–the SP1:

If I owned an FDM-DUO transceiver, I would grab this matching speaker! Knowing ELAD, I imagine the audio is impressive.  The price of the SP-1 is 140.30 EUR.

And finally, ELAD has also posted a photo of what appears to be a new amplifier:

I have no details about the SP1 speaker or DUO-ART amplifier–and few details about the FDM-S3–but I will meet with ELAD at the 2018 Hamvention in a few days and gather more details.

Follow the tag ELAD for updates.

(Source: SDRplay Press Release)

SDRplay announces the RSPduo – A 14-bit Dual Tuner SDR

Today at the Dayton Hamvention, SDRplay Limited is announcing the launch of a new Software Defined Radio product – the RSPduo.

The RSPduo is a radical new addition to the RSP line of SDR receivers from SDRplay. Architecturally, it is different from any previous RSP in that it features dual independent tuners, both piped through a single high-speed USB 2.0 interface.

The SDRplay RSPduo is a dual-tuner wideband full featured 14-bit SDR which covers the entire RF spectrum from 1kHz to 2GHz giving 10MHz of spectrum visibility. Initially using Windows based ‘SDRuno’ supplied by SDRplay, you can simultaneously monitor two completely separate 2MHz bands of spectrum anywhere between 1kHz and 2GHz.

Superficially the RSPduo looks identical to the highly popular RSP2pro and will be able to operate in a very similar way.

However, it also allows a completely new and exciting set of usage scenarios such as:

1. Simultaneous monitoring of two widely spaced bands – e.g. 40m (HF) and 2m (VHF)
2. Mixing and matching applications simultaneously – e.g. ADS-B and ATC scanning
3. Phase and time coherent demodulation of two receivers

Scenario 3 is very difficult to achieve with two separate USB devices because of the uncertainty of USB latency. The RSPduo overcomes this limitation because all traffic goes through a single USB interface, thus enabling the possibility of the development of various types of diversity demodulation such as: spatial, frequency and polarisation which can bring
huge benefits in terms of improved performance.

Jon Hudson, Marketing Director at SDRplay commented:
“As well as adding a second independently controlled tuner, which in itself, offers a whole new set of exciting usage possibilities, the SDRduo features 14bit ADCs and a completely re-designed RF front end. These changes provide better RF selectivity and even more dynamic range, offering outstanding performance under extremely challenging reception conditions. The combination of performance and features makes the RSPduo our highest spec RSP yet and sets a new benchmark in the sub $300 SDR market”

Due to its exceptional combination of performance and price, the RSP family of receivers have become very popular and the RSPduo provides the next level of functionality for both amateur radio enthusiasts as well as the scientific, educational and industrial SDR community.

As well as being demonstrated at Hamvention, the RSPduo is available direct from SDRplay or via SDRplay’s network of channel partners and resellers

The RSPduo is expected to retail at approximately $279 USD (excluding taxes) or £199 GBP (excluding taxes).

For more information visit the SDRplay website on www.sdrplay.com

About SDRplay: SDRplay limited is a UK company and consists of a small group of engineers with strong connections to the UK Wireless semiconductor industry. SDRplay announced its first product, the RSP1 in August 2014

The new SDRplay RSPduo

Moments ago, I posted a press release from the UK-based software-defined radio manufacturer, SDRplay, announcing their latest product: the RSPduo: a 14-bit Dual Tuner SDR.

I should start with the disclaimer that, not only was I sent an RSPduo to review and evaluate, but SDRplay has been a supporter of the SWLing Post for a few years now.  You’ve no doubt seen their ads in the upper right corner of our site. After I reviewed their first SDR (the RSP1) I discovered that SDRplay––all of their staff and supporters––welcome constructive criticism and even invite frank discussions. They’re a company with integrity.  No doubt, this is why I agreed to alpha- and beta-test their SDRs. Fortunately, I’ve not been disappointed.

As a company, moreover, SDRplay breaks the mold––and in very good ways:

• SDRplay is a small company that employs actual radio enthusiasts. Their designs and software cater to DXers, SWLs, hams, scanner enthusiasts, amateur astronomers, experimenters, and makers, among others.
• SDRplay designs and builds their products in the United Kingdom. No doubt they could increase their profit margin by using manufacturing centers in China, but they choose not to do so, to the benefit of their products.
• The quality of the company’s products is, at least to date, excellent.
• SDRplay’s product pricing is nonetheless quite affordable

That last item, in particular, is a head-scratcher.  Considering these facts, how does SDRplay still manage to keep their pricing so competitive? I only wish I knew.  When the company released the RSP1A last year, I had already spent a few months with alpha and beta units, mulling over their respective merits (and there were many).  So I was simply gobsmacked when they announced that the price would be just $99 US. I rather figured the company was leaving money on the table, although I was pleased to announce this price to my readers here.

Fast-forward to two weeks ago: I received the new RSPduo to review. And the price this time? $279 US. While this is currently the priciest product in the SDRplay line, let’s go over what makes this SDR special…and why I still think SDRplay may be leaving money on the table.

Introducing the SDRplay RSPduo

The RSPduo is unlike any other SDR in the SDRplay product line, and, indeed, unlike most of the budget SDRs currently on the market.

As “duo” implies, this RSP features dual independent tuners, both piped through a single high-speed USB 2.0 interface. With the RSPduo, you can explore two completely separate 2 MHz bands of spectrum anywhere between 1kHz and 2GHz.

SDRplay lays out several use-scenarios in their press release:

• The ability to simultaneously receive on two totally independent 2 MHz spectrum windows anywhere between 1 kHz and 2 GHz
• Simultaneous processing from 2 antennas enables direction-finding, diversity, and noise-reduction applications
• Ideal for cross band full-duplex reception, e.g. HF + VHF, or VHF + UHF
• Simultaneous Dump1090 and VHF ATC reception
• Simultaneous monitoring and recording of 2 ISM bands
• Use SDRuno to seamlessly control and manage the dual tuner in a single environment.

Externally, the RSPduo bears a strong resemblance to the RSP2pro. Internally, however, it’s quite different.

Besides featuring a second independently controlled tuner, the RSPduo also sports 14 bit ADCs and a completely re-designed RF front end, which enhances receiver selectivity and improves dynamic range.

In short, the RSPduo is like having two SDRs in one.

Performance

I received the RSPduo during a very busy time of the year: the build up to the Hamvention in Xenia, OH.

One of the first things I noticed about the RSPduo is its weight. When I picked up the package from SDRplay, I could tell it weighed at least twice that of the RSP1A. One reason for the extra heft is that the RSPduo, like the RSP2 Pro, has a metal enclosure. I’m willing to bet the RSPduo also has more shielding––adding even a little extra weight.

I’ve had the RSPduo on the air for more than a week now, and have checked out all of its major functions and begun to learn the nuances of navigating the dual receivers in the latest version of SDRuno.

SDRplay will, I feel sure, post a primer video on using the various dual tuner functions in the coming weeks.

Installation of the software, even in pre-production, was totally a “plug-and-play” experience. Simply install the SDRuno software package with the RSPduo disconnected from the USB port.  Plug in the RSPduo, and wait for the USB driver to load, then open SDRuno. That’s it. You’re on the air!

As I’ve indicated, the RSPduo is really like having two RSP1As in a single RSP2 Pro package. One of these dual receivers––the master––can utilize either a standard 50 ohm SMA antenna port, or a Hi-Z port. The second receiver uses one 50 ohm SMA antenna port just like the RSP1A.

I much prefer using the Hi-Z port for everything longwave and mediumwave.  I did hook up both antenna ports on the master receiver, however, and switched back and forth between the two. At least in my antenna setup, I feel like the Hi-Z option lends itself to improved sensitivity on these bands. It’s not a dramatic difference––indeed, looking at the spectrum display one barely notices the difference––but my ears told me the noise floor was lower and signal strength slightly better with the Hi-Z port. Above 2 MHz, the Hi-Z port is not prefered since it lacks the same level of RF pre-selection as the 50 ohm ports provide.

Unlike the Hi-Z port with the RSP2, the RSPduo treats the Hi-Z port more like an auxiliary antenna port. When I employed the Hi-Z port in the HF bands, I did notice small spurious noises, but this might have been due to my antenna port configuration here in the shack (my Hi-Z connector is simply attached to the shield and center conductor of my coax).

Again, however, for anything above 2 MHz, SDRplay suggests using the 50 ohm ports.

How to set up dual receivers on one screen/monitor

Listening to the FM broadcast band on the main receiver and Voice of Greece shortwave on the second receiver.

One of the first things I was eager to do was to run the dual receiver functionality on one monitor.  Although SDRplay makes this a pretty simple process in the latest version of SDRuno, I still stumbled a bit as I learned to navigate the controls.

Here’s a quick primer to get both receivers on the air on one monitor/screen:

• First, open SDRuno in “single receiver mode” (the typical SDRuno default).

• Next, click on the “RSPduo mode” button and select one of the modes.  In this case, I’m not running the ADS-B application, so I’ll choose “DUAL (NORMAL)”.

• Now, to format the “Master” receiver windows so they only use the top half of the monitor, click on the OPT button.

• Select “Auto Layouts” and “RSPduo Master.”

If you’ve followed these steps with me, your screen should look something like this:

Now you’ll want to start the second receiver. Do this by opening the SDRuno application again (as if you were opening SDRuno for the first time). Make sure you’ve selected your RSPduo if you have more than one RSP connected.

The new instance of SDRuno will fill the entire screen by default, so you’ll need to format it to occupy the lower half of the screen.

Simply click on the OPT button again, select “Auto Layouts,” and “RSPduo Slave.”

Your full screen should now look something like this:

Now you can start using both receivers, but you’ll have to always start the “Master” receiver first. In fact, the “Master” receiver must always be active in order to operate the “Slave” receiver. You can always close the “Slave” receiver without affecting the “Master” receiver; however, if you close the “Master” receiver, you will effectively close both receivers.

Again, I fully expect SDRplay will soon produce a demonstration video showing how you can navigate SDRuno’s new dual-receiver functionality.

Comparisons

As I’ve mentioned in most previous SDR reviews, I do like to take a considerable amount of time to set up SDR comparisons.

Herein lies the difficulty of reviewing an SDR’s performance. Because the user has so much power to control variables and thus shape the receiver’s function, it’s actually quite hard to make an “apples-to-apples” comparison––insuring that all important filters, gain controls, DSP, etc., are as close to identical as possible.

One tool that helps me do this is SDR Console, since it can control a number of SDRs and receiver parameters can be set up identically.  Unfortunately, the RSPduo is so new, SDR Console doesn’t yet support it.

I did use SDRuno to compare the RSPduo with the RSP1A. Fortunately, I could actually run two separate instances of SDRuno simultaneously (and on different monitors, in my case). Both were hooked up to the same antenna via my ELAD ASA15 antenna splitter amplifier.

The RSPduo’s improved dynamic range gives it an advantage in terms of noise floor, sensitivity, and selectivity.

The improved performance is not dramatic––but I understand it might be especially detectable to those who want a receiver with a more robust front end.

In fact, the RSPduo’s 50 ohm coaxial ports have quite an array of automatically configured front end filters:

Low Pass

• 2 MHz Band Pass
• 2-12 MHz
• 12-30 MHz
• 30-60 MHz
• 60-120 MHz
• 120-250 MHz
• 250-300 MHz
• 300-380 MHz
• 380-420 MHz
• 420-1000 MHz

High Pass

• 1000 MHz

And an array of notch filters

FM Notch Filter:

• >30dB 77 – 115MHz
• >50dB 85 – 107MHz
• >3dB 144 – 148MHz

MW Notch Filter:

• >15dB 400 – 1650kHz
• >30dB 500 – 1530kHz
• >40dB 540 – 1490kHz

DAB Notch Filter:

• >20dB 155 – 235MHz
• >30dB 160 – 230MHz

The thing is, I live in an RF quiet area, so I can’t fully take advantage of the SDRuno’s more robust front end.

In head-to-head comparisons with the RSP1A, the RSPduo’s performance edge is discernible. Again, I suspect it would be a bit more obvious if I lived in an urban setting with blowtorch stations in the neighborhood. Using the Hi-Z antenna port in the mediumwave portions of the band, the RSPduo has a performance edge over the RSP1A, as well.

Should you grab the RSPduo?

The new SDRplay RSPduo

Anytime a new product hits the market, I ask myself if this is the sort of product that would tempt me to reach for my hard-earned cash.

The short answer?  Absolutely! Take my money, please!  There is no other sub-$300 SDR on the market currently that has the dual tuner functionality of the RSPduo. Thing is, I’ve only had the RSPdup a couple of weeks–there’s so much yet I want to explore here–especially diversity reception!

But what if you already have an SDRplay SDR? Afterall, the RSP1A was only released a few months ago, and the RSP2 series only a year before that.

Here’s my opinion:  If you’re an RSP1A or RSP2 owner who is pleased with this SDR’s performance, I wouldn’t necessarily urge you to purchase the RSPduo simply for the modestly enhanced performance characteristics. SDRplay hasn’t retired the RSP2 and RSP1A designs because each model still holds its own, has a purpose, and obviously enjoys a healthy market.

The RSP1A is the affordable yet high performance entry model in the SDRplay product line. It’s really the best value in the radio world, in my humble opinion, at just $99 US.  Som enjoy.

The RSP2 and RSP2pro provide excellent performance, three software-selectable antenna inputs, and clocking features, all of which lend it to amateur radio, industrial, scientific, and educational applications; it is a sweet SDR for $169 or $199 (Pro version). I know of no other SDRs with this set of features at this price point. If I liked the characteristics of the RSPduo, but didn’t really need a dual receiver for my application, I’d probably reach for the RSP2 Pro.

But if you have the original RSP, and like SDRuno and the SDRplay community, then I would certainly consider this an opportunity to upgrade. For $279, you’re getting a dual receiver SDR with excellent performance characteristics that will easily surpass the original RSP––considering that you’re essentially getting two very good SDRs in one.

And if you’re all over the spectrum (aren’t we all a bit––quite literally?) in terms of usage, the RSPduo is a fascinating machine for running, say, an ADS-B receiver while independently using the same SDR box to monitor other parts of the spectrum. Or one can listen for FM DX on one receiver while trying to snag elusive LW DX on the other.

Better yet, the RSPduo only uses one USB port––an important factor if you’re using a laptop or tablet. Of course, having two receivers on two different antennas, while sharing one data port, means syncing them for diversity reception is especially effective. This alone will sway many SDR experimenters in favor of this rig.

I have yet to compare the RSPduo with the brilliant little AirSpy HF+. The AirSpy HF+ is not a wideband receiver like the SDRplay RSP series; it only covers 9 kHz to 31 MHz and 60 to 260 MHz. But if your primary concern is HF performance, the HF+ and its excellent dynamic range will impress you, if you’re anything like me. It’s also a bargain at $199––very hard to beat!

The RSPduo is a good value, in my opinion––and an inexpensive upgrade to a proper dual receiver SDR––so if that’s the sort of thing you’d like to add to your shack, go ahead and bite the bullet!

In fact, I suspect SDRplay will quickly sell out of all of the units they bring to the 2018 Hamvention (SDRplay: pack some extras!). I’m happy to see the company continue to push the price and performance envelope to such exceptional ends. I’m also looking forward to the many applications SDRplay customers (and our readers) find for the RSPduo.

Stay tuned! I plan to post more comparisons in the future.

And if you acquire an RSPduo and find some new and fun applications for it, please share!

Click here to check out the RSPduo at SDRplay.com.

Shortly after posting a set of photos I took at the 2018 Hamvention, I received a number of reader inquiries regarding one particular radio: The Mission RGO ONE.

I found this cool tabletop transceiver in the flea market area of the Hamvention early Saturday morning and included it with my inside exhibits photos. I wasn’t able to gather a lot of information from the representative at the time because the Hamvention staff opened the gates to general admission a full 30 minutes early, so I had to make a sprint to my table at the other side of the fairgrounds.

The following specifications/features were listed on the RGO ONE product sheet:

• QRP/QRO output 5 – 50W
• All mode shortwave operation – coverage of the 9 HAM HF bands (160m optional)
• High dynamic range receiver design including high IP3 monolithic IC in the front end and H-mode first mixer
• Low phase noise first LO – SI570 chip
• Full/semi QSK on CW; VOX operation on SSB.
• Down conversion superhet topology with 9MHz IF
• Custom made crystal filters for SSB and CW and variable crystal 4 pole filter – Johnson type
• Stylish and professional look
• Compact and lightweight body
• Multicolor FSTN LCD
• Silent operation with no clicking relays inside
• Modular construction – Mother board serves as a “chassis” also fits all the external connectors, daughter boards, inter-connections and acts as a cable harness.
• Optional modules – NB, AF, ATU, XVRTER
• PC control via CAT protocol; USB FTDI chip
• Memory morse code keyer (Curtis A, CMOS B)
• Contest and DXpedition conveniences

For even more detail, I recently contacted the rig’s developer, Boris Sapundzhiev (LZ2JR), who kindly answered all of my questions.

Boris replied:

Hello Thomas,

Thanks a lot for your message and interest about our new homebrew project that we called RGO ONE. Here you can find more about the radio:

QRP HF Transceiver

There are clickable highlights on the text which lead to a schematic diagram for each module so you can have a look if you like. Final documents and last revision of schematics will be available soon.

The idea of this project was inspired of an old TEN-TEC radios with 9MHz IF – their perfect analogue design and crystal crisp audio both CW and sideband. Mine have two very old TEN-TEC ARGOSY 525D and several moreTEN-TEC equipments. So with the help of the new electronic components available on the market we realize this old concept…

We’ve been working hard for almost three years to see what you saw at Dayton flea market table. A real performing HF 50W CW/SSB transceiver. We are 4 people in the team.. Other team mates are very good in industrial electronics manufacturing and helping very much with electronic PCB design, parts delivery, microprocessors and other things.

The idea of the front panel and other constructions design is mine .. I literally drew it in a couple of hours then our CAD designer put it in AUTOCAD/INVENTOR 3D design software.

Click to enlarge.

Click to enlarge.

Click to enlarge.

LCD we made in China and already stocked plenty of LCD and backlight units. Front panel is made by means of plastic mold method:

Here it is:

FACE PANEL MOLD PLASTICS OR ALUMINUM MACHINED

So far we got two samples that we tested already in real conditions and made several contest (LZ2RS helped with this task).

You can seek for video clips on YouTube (my channel) to see how it works.

Click here to view on YouTube.

I am back in Bulgaria now and today we had a team meeting so it is decided to start first lot 10pcs which will be completely ready to run. The time range of this is somewhere next two months. Then next lot will be 100 units probably some of them or most of them will be in a kit form with ready populated SMD small foot print components.

At the show in Dayton we revealed our target price for the base version – $450-$550. Hope to keep it as promised but final price will be available when first units come to alive.
First units will ship from Bulgaria, then we will try to stock more units in US.

This is briefly about our intentions of the project. A lot of interest, expectations and positive “WOW” feedbacks received so this urge me to go fast forward.

73, GL

Boris LZ2JR/AC9IJ

Thank you for the detailed reply, Boris! I will certainly follow this project with interest and post updates (readers: bookmark the tag RGO ONE).

I love the size of the RGO ONE and the fact it’s capable of a full 50 watts out in such a portable form factor. The front panel is very attractive, ergonomic and the backlit LCD screen is quite easy to read at any angle.

Boris, if you manage to hit your target price of $550 or less, you’ll no doubt sell these by the hundreds! I’ll be watching this project with interest.

Many thanks to SWLing Post contributor, Mehdi Asgari (DF2HF / NM9A), who shares photos from the Friedrichshafen ham radio convention this year. Tomorrow, we’ll post his photos of the flea market area!

Ham Radio Friedrichshafen 2018

by Mehdi Asgari (DF2HF)

Mehdi is a software engineer and SDR lover working in Berlin. He’s a licensed ham (DF2HF & NM9A) and also a member of EP2C club.

Based on readers correspondence, the most anticipated non-shortwave radio to hit the market this year might be the Sangean HDR-14 AM/FM HD radio.

Sangean sent me a sample evaluation unit and I’ve had it on the air since taking delivery last week. I’m starting to put the elements of my HDR-14 review together while also writing Part 2 of my SDR primer for The Spectrum Monitor magazine (Part 1 was published last week). Indeed, I’ve a total of five reviews and evaluations on my desk right now–!

So far, I’m impressed with the little HDR-14. If you recall my review of the Sangean HDR-16, I mentioned that one of my benchmark distant HD FM stations is WFAE 2–its transmitter is a full 101 miles from my home and I’m well outside even the the fringe reception area.

The HDR-14 has a unique back stand: a small foot that swivels out of the base of the chassis.

I’m pleased to note that on more than one occasion, I’ve gotten a reliable HD lock of WFAE from my porch. A most positive sign!

Over the next three weeks, the HDR-14 will be travelling with me and I hope to even snag an AM HD station if all goes well.

I can tell you already that I’m as pleased as punch Sangean gave the HDR-14 a total of 20 AM and 20 FM memory presets. The larger HDR-16, in contrast, only has 5 AM and 5 FM presets.

Look for my review of the HDR-14 on the SWLing Post in the coming weeks. If interested, follow the tag: HDR-14

I’ve noted that both Universal Radio and Amazon.com (affiliate link) have the HDR-14 in stock and shipping. Universal’s price is $79.99 plus shipping and Amazon’s price is $88.67 including shipping.

A number of SWLing Post readers have been asking about the status of the Titus II portable DRM/SDR radio. I’ve been checking the project website, but had not seen an update in a long time, so I contacted the company. Mike, with PantronX, kindly replied with the following update:

As you might be aware, we have joined up with Fraunhofer to include their MMPlayer app standard on Titus–what a difference a professional decoder, for both analog, DRM(+), and DAB(+), makes! MMPlayer is full featured even including reliable one way file downloads with DRM.

We are attempting also to license HD to include on the app for North America, making a truly worldwide receiver. Some deficiencies in our version of Android have caused issues as well as MMPlayer. All of which have caused delays leading to some serious business decisions – as you can imagine. You are correct that broadcasters have made large orders that will be fulfilled first. There are units in the field testing and such and continuing resolution of the software issues.

One of the issues that folks seem to have a hard time understanding is that we can not just build a few hundred or even thousands of units. Our minimum run is 10,000pcs! To do that everything has to be 100% – including the software. We simply will not ship units that are not 100%. Titus works, MMPlayer works – its that last 5% that takes the most time to resolve. These facts preclude any incremental production attempts. All that being said, we are very hopeful that the first production run is ready by last quarter of this year.

Thank you for the update, Mike!

The Sangean HDR-14 AM/FM HD radio

For the past week, I’ve been away from home spending time with my mother at the hospital while she recovers from a surgery. I’ve got a number of reviews and evaluations in the pipeline, but thankfully no shortwave or HF radios on the table this week (although the ELAD FDM-S3 and CommRadio CTX-10 are just around the corner). Listening to shortwave (or even mediumwave) in a hospital room can be an exercise in futility–there are just too many devices emitting noise and the buildings are built like bunkers with incredibly thick walls to attenuate signals.

I’ve had the little Sangean HDR-14 with me, however, and have been very pleased with its ability to snag FM stations both analog and digital. I’ve also had fun discovering a surprisingly diverse FM landscape in this metro area. I haven’t snagged an AM HD station yet, but my hope is one evening I might DX one (fingers crossed and not holding my breath).

The Sangean HDR-14 (left) and CC Skywave SSB (right)

At the end of most days, I’ve been able to catch a little shortwave action with my CC Skywave SSB (pre-production) portable at the guest house where I’m staying. The evenings have been surprisingly peaceful here with only the occasional popup thunderstorm to insert a little QRN in my listening sessions.

Last night, while listening to jazz on FM, I finished reading All The Light We Cannot See by Anthony Doerr (affiliate link).

We’ve mentioned this book before and I know of at least dozen SWLing Post contributors and friends who’ve personally recommended it to me.

It is a superb novel and will, no doubt, tug at the heart strings of any radio enthusiast or WWII history buff. Highly recommended!

Indeed, last night I couldn’t fall asleep until I finished the book around 12:30 AM!

And mom? She’s recovering quite well and we hope will be discharged from the hospital soon.

A few weeks ago, we posted an announcement that spectrum analyzer software was being developed for the SDRplay RSP software defined radio series. Many thanks to Andy, at SDRplay, who shares the following announcement:

We are pleased to announce the availability of the first cut of Spectrum Analyser software developed by Steve Andrew specifically for the RSP line of products. Please note that this is first alpha software and so it is still very much in development and some features are still to be added. Currently supported are:

• RSP1
• RSP2/RSP2pro
• RSP1A

This first alpha release gives a good idea as to the look and feel for the software. The main functional limitation is that sweeps of greater than 10 MHz are not currently supported. Steve is currently re-working the algorithms for providing wider sweeps than 10 MHz to improve sweep time and remove the issue of the DC spike in ZIF mode, so please bear with him.

We recommend using the software with AGC turned off and use manual control of the gain for better display stability.

Please see the Spectrum Analyser webpage: https://www.sdrplay.com/spectrum-analyser

Best regards,

SDRplay Support

The new Icom IC-R30 handheld wideband receiver at the 2018 Hamvention.

Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who notes that he has published his comprehensive review of the Icom IC-R30 handheld wideband receiver.

Click here to check out Dave’s review.

Based on Dave’s evaluation, it sounds like this is one of the better wideband radios, although like similar models, its utility in the HF and mediumwave bands is somewhat limited. He gives the R30 good marks for AGC and notes a lack of spurious emissions on MW. Unlike other wideband handhelds, he noted no mediumwave stations overloading the HF bands. With the unit connected to an external HF antenna however, intense overloading occurred on these bands.

As I tell anyone considering a wideband handheld, don’t buy it with the intention of logging weak signal DX on the HF bands–it’s just not a great receiver for this. It shines on those higher frequencies starting in the VHF band and moving up.

Thanks for sharing your review, Dave!

Many thanks to SWLing Post contributor, The Professor, who shares the following review of the XHDTA D-328:

First off, this is the best radio I’ve ever operated… that cost me less than ten dollars new. When I saw the promotion on the SWLing Post for free or half price radios, I had to bite, especially because the deal was that the first ten to respond would get a free XHDATA D-328. They told me I was the 15th caller, so I was allowed one for half price. And since they were going for just under fourteen bucks on Amazon, it felt like it was almost free.

Of course, I didn’t expect much. But as they wanted the people who received these free or very inexpensive little radios to leave reviews, I figured the Chinese manufacturers knew there were some good features radio folk might notice. And there are. And I’m not sure if I’ll post part of this brief review on Amazon, but I’ll do so here in this comment.

If you want a radio that will reliably pick up local AM and FM stations and play some MP3 files, this will work, and work pretty well. And it doesn’t sound bad at all for the size. I personally don’t have much love for these new analog-style tuning DSP radios, but I suppose people who aren’t as radio wise as readers of the SWL Listening Post won’t notice the less than poetic effects of moving between stations on these sets. Most probably tune in their desired stations and just listen to it, and this radio does this well enough.

I don’t really listen to FM much, but the XHDATA D-328 seems adequate enough. And with headphones on it sounds quite rich on FM. AM isn’t bad either, but it’s far from selective. I was able to dig out clear channel regional biggies like Zoomer Radio at 740kHz and WHAS at 840kHz in Louisville from here in Brooklyn at night, but in between often easy to find fifty-thousand watt stations like WBBM or CKLW weren’t there. The DSP tuning just defaulted to the next local station like WNYC or WABC when I turned the dial.

Shortwave was worse. Beyond the U.S. powerhouses like WWCR this radio doesn’t seem a very worthy shortwave set for those of us in North America. But I can imagine in that in third world countries where international and local broadcasters still target broadcasts that this radio might be an inexpensive way to access that programming.

I must admit that listening to MP3 music files was kind of pleasing. Again, the audio is really good for a radio at this price point. However you are listening blind, there’s no screen to tell you what you’re hearing, and no shuffle function to make a folder full of MP3s into unique sequences of songs each time. What you get are the songs in the alphabetical order of the file titles, although you do have the option to jump ahead 10 files before or after the one you are playing. So the best use of an MP3 player like this would be to listen to podcasts or whole radio programs with it. What I would do is copy the files onto the SD card and then perhaps number the filenames in the order I would like to hear the shows.

So, for the price there’s not a lot to complain about. People have already mentioned the off-center small kickstand, and that’s a little cheesy. But the tuning thumb wheel moves smoothly thru the imperfect DSP tuning function, and the volume thumb wheel is actually analog which make it much easier to get the exact volume you want out of this radio. But the sliding band selection switch under the tuning scale is a bit worrisome, as I’ve had a few cheap Chinese radios with a switch like this and just normal use eventually rendered them unable to switch bands adequately. This one feels a little bit more stable then they did, but time will tell.

All that said, there are radios that are not too much more expensive than this radio that offer much more in a number of ways. The small and inexpensive analog Tecsun radios from a few years ago are a case in point. Selling for twenty to thirty dollars, those multi-band radios are a little challenging to tune (a stiff thumb wheel on some), and the tuning scale may be a little off and they may drift a little, but the analog tuning is a much better experience. And you can DX with them. I remember listing to All India Radio with a decent signal one afternoon on my Tecsun R-9710.

There’s a lot of similar analog radios which I believe are probably just about the same radio – the Tecsun R-9012, the Tecsun R-911, the Tecsun R-909 and the Kaito WRX-911, among others. Once you get a look at these you’ll recognize other similar radios in this family. I’d say they’re the best really cheap receivers I know of. They generally run between twenty to just over thirty bucks. I believe these radios appeared on the scene in the early 2000s.

I have this fear that they’ll start turning these radios into DSP sets. That would be a real shame, but I’ve heard no mention of that. However I did notice that the marketers of the XHDATA D-328 didn’t even mention that it was based on a DSP chip. And Chinese manufacturers are notoriously not very open about how they are altering radios that they’re putting out, so be aware of that.

As far as MP3 playback, the one radio I would really recommend is the Meloson (or Tesslor) M8 (or the Meloson M7 or S8 if you can find one). It’s simply the best audio you’ll hear in a really small radio, AND you can shuffle the MP3 files in a folder with these. While it only give you the sequential number of the song in the display, it will generate a unique sequence of songs each time you shuffle. Fill a folder on a card full of songs and let it rip. It’s the perfect micro music player if you make a good folder of music. And the DSP radio in these is not bad either. It’s digital, not fake analog tuning, and most AM clear channel targets you can usually find at night in your region will show up on these. They used to go for less than thirty bucks, but right now I see they cost close to fifty dollars.

Two other radios I have that I can recommend for MP3 playback, are the Tecsun ICR-110 and the Tivdio V-115. Neither one offers playback shuffle, but they will play the files in alphanumeric order just fine. But they both have a cool feature in that you can press a button and record the broadcast you’re hearing as an MP3 file. And they both also sound great. The Tivdio has incredible sound for a tiny radio, but the ICR-110 is even more impressive. I believe it has the same speaker setup as the much more expensive Tecsun PL-880 and it also has similar warm and clear audio.

The reception with the V-115 is OK, nothing stellar, but the ICR-110 is kind of a monster on medium wave. I’ve been impressed. The ICR-110 is rather big compared to the other radios I’ve mentioned, closer to the PL-880 in size, but quite a bit lighter. The ICR-110 used to be cheaper, but can be found for around forty bucks. The Tivdio V-115 still goes for just under twenty if you look around. A bargain. Tecsun, Tivdio, Degen and other Chinese manufacturers have all sorts of inexpensive radios for sale out there, and others I haven’t used or mentioned might be quite good as well. If one appeals to you, do a little online research.

Of course, since I’m talking about small and inexpensive radios I should mention that the Tecsun digital DSP sets like the PL-310ET, the PL-360, PL-380, PL-390 and other variations are all amazing inexpensive radios that will run you around 35 to 50 bucks. The ultralight DX community loves these things, and for good reason. And there’s a version of the PL-390 that plays MP3 files from an SD card and another that offers bluetooth playback. No, none are perfect, but they’re solid sets, and all would have been dream radios thirty years ago.

So, that’s my evaluation of the XHDATA D-328, well worth fourteen dollars, but for a few dollars more you can get radios with similar features that do much more. It’s small, it doesn’t sound bad, and it’s fairly well-built. It will pick up all your favorite local stations and play all your MP3 podcasts effortlessly. Not bad. Like I said, it’s the best super cheap radio I’ve ever used.

Excellent review!  I’m impressed that the D-328 has enough AM performance to grab some  night time clear channel stations. It’s disappointing, however, that it lacks performance on the shortwave bands.

Thanks for posting your review–always great to hear from The Professor!

The XHDATA D-328 is available on Amazon.com (affiliate link).

Click here to read other XHDATA D-328 posts.

Many thanks to SWLing Post contributor, Richard Langley, who shares this article from Radio World. Here’s an excerpt:

Headsets Deliver FM to Mobile Devices, No Chip or Internet Required

[The BLACKLOUD SOUNDOT AF1] headsets are nothing like the ones you might remember from your first Sony Walkman. According to information provided by Blackloud, SounDots feature patented psychoacoustic technology, a six-band customizable graphic equalizer, 3D stereo effect, dual dynamic driver design, inline microphone, and a control box with a volume up (+), volume down (–) and multifunction (pause/play) button. This multifunction button enables many actions depending on the app that is running, including: answer/hang up a phone/video call, start/stop recording or playback using most any audio/video/camera app, enable/disable/seek up/down the FM tuner, and lastly, activate Siri or Google Assistant.[…]

Click here to read the full article at Radio World.

Richard notes that we’ve posted articles in the past focusing on the fact that iPhones (and a number of Android phone models) do not have or allow user access to a built-in FM reception chip.

Richard sees the new Blackloud SounDot AF1 earphones as an elegant work-around and has pre-ordered a set. If these earphones live up to their specs, they should sound fantastic.

Richard, I hope you’ll post a review after you put them into service! Thanks for the tip!

Click here to view the SOUNDOT AF1 ordering page.

Without a doubt, C. Crane Company has become an established name in our radio community as a retailer and manufacturer that focuses on the world of broadcast listening. The company’s ads, website, and blog all promote broadcast listening as a viable and important part of our evolving media landscape. Their radio products are all designed with broadcast listening in mind.

The C. Crane CCRadio 2E

Currently the company manufactures one of the most capable AM broadcast receivers on the market: the CCRadio-2E.

The CCRadio-2E, however, is a pricey portable at $170 US, perhaps overkill for the casual broadcast listener.

So, for those seeking a simpler broadcast receiver, C. Crane later developed the original CCRadio-EP, a bare-bones, fully analog AM/FM radio with a large backlit slide rule dial, designed for the listener who wants to “go old school” in their receiving.

The original CCRadio-EP also attracted mediumwave/AM broadcast radio listeners because it had fairly impressive performance characteristics supported by C. Crane’s patented Twin Coil Ferrite AM antenna. In many ways, the original CCRadio-EP was somewhat reminiscent of the GE Superadio.

Yet while the original CCRadio-EP has––according to C. Crane––been a popular product, because certain vital EP components are now becoming obsolete, the company has been forced to redesign it;  hence the new CCRadio-EP Pro.

The CCRadio-EP Pro: A different animal

Let’s be clear, though: unlike its predecessor, the CCRadio-EP Pro is no longer a true analog set.

Despite external similarities, internally this radio and its predecessor are very different receivers. Inside, the EP Pro is based on the Silicon Labs SI4734 DSP chip. Perhaps it goes without saying, but I consider the move to a chip a significant design change.

In other words, much like the Degen DE321, the Degen DE32, the Tecsun R-2010D, the Kchibo KK9803 and the ShouYu SY-X5 (which I review in a shoot-out here), the CC-Radio EP Pro is a mechanically-tuned DSP receiver.

Crane kindly sent me a review sample of the new CCRadio-EP Pro. It’s important to note that the review unit came from a strictly limited first production run; the actual consumer rig’s first major production run is still a few weeks away.  Thus this radio is not yet shipping.

I’ve had the CCRadio-EP Pro for a few weeks now, during which time I’ve given it a thorough evaluation. So, let’s take a close look at the CCRadio-EP Pro––first, in terms of performance.

AM Performance

Let’s face it:  if you’re a radio enthusiast and reading this review, you’re likely mainly concerned with the EP Pro’s performance on the AM broadcast band. Personally speaking, that’s true for me, too.

The CCRadio-EP Pro (left) and Tecsun PL-660 (right).

Over the years of reviewing portable receivers of all stripes, I’ve learned that nothing beats a radio specifically designed for AM broadcast band performance. Without a doubt, C. Crane intends that the CCRadio-EP Pro be one of these radios. Indeed, in many ways, it’s an ideal set for broadcast listening, because it sports:

• C. Crane’s Twin Coil Ferrite AM antenna
• A large speaker
• Wide/Narrow bandwidth switch
• Dedicated external antenna connections

Although beefy internal AM antennas, large speakers, and external antenna connections were relatively common in the 1970s and 80s, these are rare features among modern AM/FM portable radios. The fact is, radios with superb AM broadcast performance are becoming a rather rare breed.

External antenna connections

In other words, the CCRadio-EP Pro has many design features that position it to be a formidable AM broadcast band receiver.

So, then, how does it perform? Well…that’s complicated to explain. The CCRadio-EP Pro has some positives, but also a notable amount of negatives.

Let’s start with the good news.

Positive: AM Sensitivity

Comparing the CCRadio-EP Pro (left) with the Sony ICF-5500W (right) and the Tecsun PL-660 (middle) at the Pisgah Astronomical Research Institute.

The CCRadio-EP Pro is quite sensitive on the AM broadcast band. When I’ve compared it with a number of shortwave portables I own, it almost always outperforms them on frequency. When my Tecsun PL-660––one of the most sensitive mediumwave receivers among my shortwave portables––is tuned to a marginal signal, it sounds about half as sensitive as the CCRadio-EP Pro.

Check out the following comparison videos:

Click here to view on YouTube.

Click here to view on YouTube.

Click here to view on YouTube.

Click here to view on YouTube.

The noise floor is fairly low while the audio is robust and room-filling via the EP Pro’s front-facing speaker.

Positive: No drifting

As I’ve said above, unlike the original (analog) CCRadio-EP, the EP Pro is a mechanically-tuned DSP radio. In all of my testing, I never noted a time that the radio drifted off frequency.

Positive: Nulling

Crane’s internal Twin Coil Ferrite AM antenna affords the listener excellent gain and nulling capabilities. In fact, I find the nulling quite sharp, a major positive for this listener.

Positive: Fine tuning control

On the right side of the CCRadio-EP Pro you’ll find a large tuning knob (top), the antenna trimmer (middle), and large volume knob (bottom)

Like the original EP, the EP Pro has a Twin Coil Antenna Fine Tuning adjustment.

This feature can help make small adjustments to received station to peak reception. This fine tune control is actually trimming the twin coil ferrite bar.

Positive: Wide/Narrow filter

The EP Pro does have a Wide/Narrow filter selection which essentially helps widen or narrow received audio. Note that this has no meaningful impact on the imaging mentioned below.

Altogether, this about sums up the CCR-EP’s positive performance capabilities on the AM broadcast band.

Now let’s look at the CCR-EP’s negatives, some of which are, unfortunately, significant.

Negative: Muting between frequencies

The original CCRadio-EP revives the joy of a purely analog radio set.  When you tune up/down the bands, there’s a fluidity to the whole process. While the interface is simple, analog tuning allows your ears to pick up on the nuances––the rise and fall of stations both strong and weak as you travel across the dial.

As we mentioned earlier, mechanically-tuned DSP radios, like the new CCRadio-EP Pro, may look like analog sets, but inside, they’re entirely digital. And one drawback to all of the mechanically-tuned DSP radios I’ve tested so far is a tendency to mute between frequencies. With each 10 kHz frequency step, you’ll hear a short audio mute. If you tune across the dial quickly, audio mutes until you land on a frequency. Here’s a video demonstrating the effect:

Click here to view on YouTube.

Needless to say, muting makes band scanning a more fatiguing process. It’s really a shame this affects the AM band. I hope that C. Crane engineers can minimize this issue in future production runs, but I understand much of this is a characteristic/limitation of this particular DSP chip.

Negative: Images

Crane actually includes a note about weak images which you might find below and/or above your target signal. Weak images are an unfortunate reality of the CCRadio-EP Pro; they’re prevalent on both AM and FM.

Here’s how you’ll experience the images by way of example: let’s say you’re tuning to a strong local AM station on 630 kHz, noting that the EP Pro has 10 kHz tuning increments. As you tune to 630 kHz, you’ll hear the station on 620 kHz, though it won’t be as strong as it is on 630 kHz. Then if you tune to 640 kHz, you’ll likely hear a weaker image of the station there, as well. In my experience, images are present on both sides of the target station if the station is strong. If it’s a weak station, you might only hear it, say, 10 kHz lower but not above (or vise versa).

The CCRadio-EP Pro is powered by four D Cells.

As you might imagine, this poses a problem for the weak signal AM broadcast band DXer. Let’s say you’re trying to snag an elusive DX station on 640 kHz; although the EP Pro might have the sensitivity required to grab that station, it’s simply not selective enough (if selective is indeed the right word) to reject the local station on 630 kHz, thus your weak DX will have local competition.

This, more than any other negative, takes the EP Pro out of the realm of the mediumwave DXer.

Negative: Inaccurate dial

I’ve also discovered that, on my unit, the top half of the AM dial is inaccurate. I estimate that the slide rule dial is off by about 40-50 kHz at the top end of the band. It’s much more accurate below 1,200 kHz, however.

Here is a few photo of the CCRadio-EP Pro tuned to 1600 kHz:

I hope C. Crane can address this in future iterations of the EP Pro. While I don’t expect slide rule dials to be extremely accurate, there nonetheless needs to be some reliability.

Note: C. Crane engineering is aware of this problem and even attempting to implement a fix on the first production run units. I will follow up when I learn more.

Negative Audio “pop” with power on

As you might have heard in the band scanning video above, any time you turn on the CCRadio-EP Pro, you’ll hear an audio “pop.” This is happening when power is applied to the audio amplifier. The pop is not soft, but fairly audible, and is present even if you turn the volume down all the way. The audio pop is prevalent via both the internal speaker and when using headphones. Fortunately, it’s much less pronounced via headphones.  While not a major negative, I find it a bit annoying, and don’t doubt that other listeners will, too.

Note: C. Crane engineering tell me that they’ve minimized the audio pop since making the limited first production run, thus the first full production run should be improved.

Negative: AM frequency steps currently limited to 10 kHz

My initial production run EP Pro is limited to 10 kHz frequency steps. This radio is primarily marketed to North America where 10 kHz increments are standard. Of course, if you’re trying to use the EP Pro to snag Transatlantic or Transpacific DX, you’ll miss the ability to tune between those broad 10 kHz steps. But, again, due to the imaging mention above, I think the CCRadio-EP Pro is simply not suited for DXing.

Note: C. Crane engineering has informed me that future production runs of the CCRadio-EP Pro may have a 10/9 kHz switch, thus eliminating this negative. If you’re reading this review a few months after time of posting––crossed fingers––this may already be resolved.

FM Performance

If you’re looking for a simple AM/FM radio, and plan to spend most of your time on the FM band, you’ll like the CCRadio-EP Pro.

Positive: Audio

FM audio is very good on the CCRadio-EP Pro. I think it would be safe to say that it’s superior to most other receivers currently on the market in its $85 price range. Audio is room-filling and has good characteristics with dedicated adjustments for Bass and Treble. FM audio is reminiscent of 1970s-era solid-state receivers like the GE Superadio (a big positive, in my book). The bass is not very deep and resonant, nor the treble super-crisp, but the sound overall is very pleasant to the ear.

Positive: Sensitivity

The EP Pro is a sensitive FM receiver. It received all of my benchmark local and distant FM stations.

Positive: No drifting

As with AM, the EP Pro does not drift off frequency (again, this is actually a DSP radio).

The FM band is less affected by some of the negatives that impact AM broadcast band listening:

Negative: Inaccurate dial

As with the AM dial, FM frequency markings are slightly off. I measured the entire FM band and found that the upper half of the dial (above 102 MHz) seemed to deviate the most. See images below comparing the Tecsun PL-660 and CCRadio-EP Pro tuned to the same FM frequencies:

Here are a few examples of the CCRadio-EP Pro and Tecsun PL-660 tuned to the same frequencies:

Note: As mentioned above, C. Crane is trying to implement a fix for this in future production runs.

Negative: Imaging

As with the AM band, you will find imaging on the FM band. This bothers me less on the FM band, but I live in an area where the FM dial isn’t incredibly crowded. If you live in an urban market with stations packed into the dial, then the imaging concern will probably make the experience of listening to a weak station adjacent to a strong station quite unpleasant.

What about muting between frequencies? While you can hear frequency steps on the FM band, there is little to no muting between frequencies. It almost feels more like an analog radio.

Click here to view on YouTube.

Funny, but the weak signal images around a strong FM frequency actually help contribute to an analog-like experience during band scanning, as stations seem to rise and fall as you tune.

There is another factor that I don’t really consider a positive, but is worth noting.  The EP Pro is one of the best mechanically-tuned DSP receivers to use on the FM band because the slide rule dial is wide––there’s a larger space for the needle to travel. FM band scanning would be a pretty pleasant experience if only the dial markings were more accurate.

Summary

Every radio has its pros and cons. When I begin a review of a radio, I take notes from the very beginning so that I don’t forget some of my initial impressions. Here is the list I formed over the time I’ve spent evaluating the C. Crane CCRadio-EP Pro.

Pros:

• Excellent AM sensitivity
• Good audio via internal speaker
• Internal Twin Coil Ferrite AM antenna provides excellent gain and nulling
• Excellent dial backlighting
• External AM/FM antenna connections
• Quiet (included) power supply
• Low noise floor
• Dial backlighting

Cons:

• Imagining on both AM and FM
• Muting between frequencies on AM
• Pop in audio when unit is turned on, regardless of default volume level
• Dial markings inaccurate
• AM frequency steps currently fixed too broadly at 10 kHz (though future units may have a 9/10 kHz toggle)

Conclusion

My conclusion is that the CCradio-EP Pro is simply not an enthusiasts’ radio.

If you read the list of negatives in the AM performance section of this review, you’ll know why I simply can’t recommend it…at least not yet. If C. Crane could minimize AM muting, improve imaging and fix the frequency accuracy, this radio may prove more promising. But at this point, the limited production run CCRadio-EP Pro lacks the level of refinement that I’ve come to expect from a C. Crane radio.

For what it’s worth, I have been in close contact with C. Crane regarding these issues; the company is taking them to heart and even looking to implement some fixes/adjustments prior to their full production run. As these issues are resolved, I’ll amend this review.

The lack of refinements is somewhat disheartening. Otherwise, the CCR-EP Pro would be a great mediumwave DXing machine. When on frequency, it’s quite sensitive and stable! Perhaps some mediumwave DXers could overlook the negatives above to take advantage of this.  I would not, however. I’d soon find the problems frustrating and turn to other receivers in my arsenal. Sensitivity is important, but personally I would sacrifice sensitivity to have an overall better tuning and listening experience.

On the other hand––as C.Crane makes a point of stating––the CC-Radio EP Pro was designed around the needs of Bob Crane’s mother: so is essentially an effective radio for casual listening that’s utterly simple to use.  In this respect, at least, the EP Pro is a success.

The EP Pro has no multi-function buttons, no menus, and no memories. The knobs and buttons are tactile and obvious. The backlit dial is also a nice touch; I love it. The EP Pro is old school design around a modern DSP chip and, in terms of audio, a hat tip to classic solid state analog radios from the 1970s and 80s.

The casual listener––especially those who use radio to primarily listen to their one favorite station––will enjoy the EP Pro. For example, I have an older friend who’s in the process of replacing his bedside radio of 30+ years.  He wants a set he can tune to his staple AM broadcast station (which is not a super-easy catch) and leave it on frequency––essentially, he wants a “set it and forget it” radio. I think the EP Pro will work well for this application.

But for radio enthusiasts––like most of you wonderful people who read the SWLing Post––I would pass on the EP Pro and consider a more capable mediumwave radio instead like the original CCRadio-EP, the CC-Radio 2E, or a vintage solid state set like the GE Superadio, Sony-5500W, or the venerable Panasonic RF-2200.

Click here to view the CCRadio-EP Pro at C. Crane Company.

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN), for sharing the following guest post:

TYT Frequency Counter/Tone Meter Review

by Mario Filippi (N2HUN)
All photos courtesy of author

Most hobbyists own some type of transceiver whether it is a handheld, mobile, or base station. Some examples are amateur radio HF/VHF/UHF transceivers, Citizen’s Band radios, FRS (Family Radio Service) and GMRS (General Mobile Radio Service) handhelds.

A useful tool for the shack or the field is a frequency counter/tone meter since it can measure frequencies and analog/digital tones from transmitters/transceivers. At times ascertaining that a UUT (Unit Under Test) such as a 2 meter handheld is transmitting accurately may be indicated due to problems communicating with other stations. In addition, if the UUT transmits a sub-audible tone (either analog or digital) to access a repeater, a frequency counter/tone meter can detect the presence and verify accuracy of the CTCSS/digital tone.

Author’s TYT SF-401Plus, includes instructions, antenna, rechargeable battery and charger/cable. Covers 27 MHz – 3 GHz

Frequency/tone meters can be purchased for less than twenty US dollars but normally do not include a rechargeable battery and BNC connector for attaching an external antenna. Having had experience with these types, the time finally came for an upgrade.

After shopping around a decision was made to purchase the Tytera TYT SF-401 Plus. This model includes an instruction sheet, antenna, internal rechargeable battery, USB charger and cable. It represents a significant improvement over my previous, inexpensive meter, as the TYT has a BNC connector to attach a larger antenna and has four control buttons on the front panel. It also has, via a system menu, options to adjust the frequency/tone offset, dimmer levels, three or four decimal display and auto power off. All these valuable features warrant a higher cost, which was about $50, but well worth it. This price fits the budget of most hobbyists. However, higher end frequency/tone meters are available and cost several hundred dollars for those requiring that level of quality.

Out of the box the TYT SF-401 Plus, when checked against an IFR FM/AM-500A communications service monitor, was right on the money as far as accuracy. Note that the IFR-500A was calibrated against a high precision internal 10 MHz crystal in an “oven” and this is my gold standard reference for frequency accuracy in my shack.

TYT accuracy checked against an IFR FM/AM-500A communications service monitor transmitting a 146.52 MHz/131.8 Hz tone. Note frequency readout to four decimal places.

Now, it was time to check typical radios around the shack using the TYT. The first radio tested for frequency accuracy was a BTECH GMRS-V1 HT which I use to communicate with the home QTH while running errands around town. See photo for results. The BTECH and TYT agreed perfectly. Note that the TYT’s display includes a battery status indicator on top left and a timer use indicator, which resets every time the TYT is turned on. If you are going to measure digital signals (not included in this review) there is an option in the Setup Menu for that. With the BTECH handheld running 2 watts the TYT could detect its’ frequency at roughly four feet away.

Confirming BTECH transmit frequency against the TYT. Output is 2 watts. TYT multicolor display is super.

For VHF/UHF operating, especially when afield with other hams or groups such as CERT (Community Emergency Response Teams), problems can ensue if one does not have the correct frequency or tone programmed, so having the TYT in your shirt pocket to confirm these parameters when trouble occurs can be a quick way to get to the problem. See photo of an Icom IC-2300H 2 meter transceiver checked against the TYT for proper offset and tone. The Icom was putting out 65 watts and a repeater with an offset of -1.3 MHz and 88.5 Hz tone was checked.

TYT confirming unusual offset (-1.3 MHz) and tone for a repeater. Icom IC-2300H was at high (65W) setting and connected to an outdoor discone antenna.

According to the instructions included with the TYT SF-401 Plus, the operating range is from 27 MHz – 3000 MHz with a note stating “27 MHz – 100 MHz it can not be guaranteed and the corresponding normal emission appliance” which I interpret as accuracy is not guaranteed in this frequency range. Well, I checked the TYT against the IFR FM/AM-500A service monitor transmitting an AM signal on CB Channel 19, 27.185 MHz, and the TYT measured it exactly. One other important note is that according to the instructions, the tone decoder operates in the 136 MHz – 174 MHz and 400 MHz – 520 MHz frequency range. So that may limit its use in certain areas of the spectrum. One other item if interest is that the TYT has a 10 dB attenuator when dealing with high power signals.

All in all, I’m very happy with this purchase, and find the TYT SF-401 Plus useful for “first pass” troubleshooting and helpful when aligning older rigs which due to age are off frequency /tone. It definitely has a use in this shack.

Wow–what a bargain tool for the radio shack! Thank you for sharing your review, Mario.  Once again, however, you have tempted me with a purchase!  I remember when frequency counters would set you back a couple hundred bucks–it’s insane to think that you can grab one for $40-50 US shipped.

SF-401 Plus Retailers:

Note that the TYT SF 401 Plus is also marketed as the Surecom SF401 Plus:

• Universal Radio ($59.95 + shipping)
• Search eBay ($40 US shipped and up)
• Amazon.com ($39.99 shipped – affiliate link)

Many thanks to SWLing Post contributor, DanH, who writes:

I put up a couple of videos on my “Willow Slough DX” YouTube channel nine hours ago that may rate at least an Arte Johnson (Laugh-in) “verrry interestink”. These are two videos of the North Korean shortwave station Voice of Korea operating with their new time zone and on their new schedule.

These are the two most recent videos of SW station receptions that I have posted during the last couple of days.

[The first video] is the VOK shortwave sign-on recorded at the newly scheduled time of 04:00, May 5, 2018 UTC on 15180 kHz. Distance: 5600 miles. Receiver: Sangean ATS-909X. Antenna: suburban 83m horizontal loop. Receiver location: Davis, California, USA. North Korea has changed its time zone to match UTC +9 which is used by South Korea. I was accustomed to tuning in Voice of Korea at 38 minutes past the scheduled hour for the English language news. Now I tune in at 8 minutes past the same hour. VOK broadcasts that were scheduled for 04:30 UTC now begin at 04:00 UTC. At the time I write this VOK shortwave programs listed on Short-Wave.info still show the old times:

Click here to view on YouTube.

[The second video] is the VOK shortwave newscast at the new time of 04:08, May 5, 2018 UTC on 15180 kHz. Some interference is heard half way through the clip:

Click here to view on YouTube.

Thanks for sharing this, Dan!  It never crossed my mind that VOK would change their international broadcast time based on the fact they shifted their country’s time zone. From a North Korean perspective, though, I suppose this makes sense. Thanks for the tip!

Click here to check out other recordings on Dan’s YouTube Channel.

Many thanks to SWLing Post contributor, Robert Gulley (AK3Q), who notes that Black Cat Systems has developed a simple 22 meter beacon kit. The price is $20 shipped! A few details:

The kit includes the PCB and components, including a custom programmed microcontroller that will continuously transmit the ID / callsign of your choice, up to 8 characters, at about 13 wpm.

Small size – just 2 7/8 by 1 1/2 inches. Easy to build, just a few components, all through hole, no surface mount.

When ordering you note your callsign/ID to send and it will be pre-programmed.

Black Cat Systems has all kit details including full instructions on their website.

If you like the idea of building a beacon, you must also check out the beacon Dave (AA7EE) built recently–a true work of art!

[UPDATE: Click here for information about downloading Steve’s Spectrum Analyser tool.]

(Source: SDRplay)

Steve Andrews contacted the SDRplay forum recently to share ideas for a new Spectrum Analyser tool for use with SDRplay RSPs. A lively discussion started, with a lot of enthusiasm and encouragement from the user community, for something optimised for these devices. Steve is progressing well with the software development and hopes to have an Alpha release of the basic tool available during May. You can follow the discussion, review progress and add your comments by joining the SDRplay forum and going to: https://www.sdrplay.com/community/viewforum.php?f=12 where we have created a section especially for the Spectrum Analyser topic.

Many thanks to Dennis Walter at Bonito for sharing the following product announcement:

MegaDipole MD300DX wideband active dipole

The MegaDipole 300DX is a broadband active dipole with a maximum upper working frequency of 300 MHz. The dipole reacts to the electrical component (E-Field) of the electromagnetic field and will deliver best results regarding signal strength and SNR (signal -to-noise-ratio) at locations with little or no locally generated interference. Nonetheless, the receiver to be coupled to this antenna should have a high enough dynamic range so that it can effectively process the received signals.

In contrast to simple E-field antennas with only one radiating element, the symmetrical construction of the MegaDipole 300DX, will result in almost no negative resonance effects or reflections caused by the coaxial cable.

First choice for DXer

The MegaDipol MD300DX is the ideal antenna for DXers. Particularly in electrically quiet environments, it can really play to its strength in efficiently amplifying weak signals. In practical operations, a maximum signal-to-noise ratio of 110dB was achieved! (see image )

Wideband

With prodigious broadband capability and constant receive characteristics the MegaDipol MD300DX is ideal for wideband receivers, SDR’s and WEB-SDR such as KiwiSDR etc. The MegaDipol MD300DX can of course also be operated on all other receivers, including lower-end SDRs and portable world receivers.

Dual Power Power Supply

The MegaDipol is nominally supplied with 10 – 15V DC (max 40mA), however, it can be operated across a wide variety of supply voltages. The antenna can even be operated with slightly reduced IP values at the same gain with only 5 volts via USB. This offers a significant advantage in that you can supply the MegaDipol on trips away from the radio shack or DX expeditions autonomously, using a low-noise USB power-bank.

The MegaDipol has already attracted a lot of attention with its receive performance at various events such as DX-Camps, field days and in-house exhibitions. In these tests, the MD300DX surpassed the existing antennas usually by 10-15dB in the SNR.

Technical data

• Frequency range: 9kHz – 300MHz
• IP3: typ. +30dBm (@7.00 & 7.20MHz)
• IP2: typ. +78dBm (@7.00 & 7.20MHz)
• Size/weight: 98 x 90 x 38mm / 0.12kg

Whats in th Box?

• MegaDipol MD300DX
• Power Inserter CPI 1000DP
• 2x 2.5m long radiating elements (PVC-coated, salt-water resistant stainless steel ropes)
• 2 insulators for installation (weatherproof plastic material with 4.5mm fixing hole)

Folks have been known to say that good things come in small packages.  And, do you know what? They’re sometimes right. [Spoiler alert: This review features a good thing which comes in a small package.]

I’ve been in the process of evaluating some pretty complicated pieces of communications equipment lately. So when Sangean approached me a few weeks ago and asked if I would check out their latest FM radio and Bluetooth speaker––a comparatively simple piece of kit––I thought, Well, why not? Because while I prefer “enthusiast grade” radios, sometimes it’s nice to check out something super-simple and purpose-built from a company I’ve grown to trust. Plus, it didn’t hurt that Sangean actually bothered to include FM radio on what would otherwise simply be just another Bluetooth speaker.  Ah, yes; a worthy addition.

Sangean dispatched the sample radio and I received it within a few days. I was expecting something roughly on the scale of a Tivoli Model One.  Instead, when I opened the box, what I found was a radio only slightly larger than my diminutive  Muzen OTR, a little radio that fits the palm of your hand. To be fair, it could only be called…cute.

By my measurements, the tiny Sangean WR-7 is about 2 1/2″ tall, 4 5/8″ wide, and 3″ deep (if you include the tuning knob in that last dimension). It’s mini by almost any standard.

For this photo I placed it next to my handy XHDATA D-808 compact radio.  And here’s how they compare:

Though wee, the WR-7 feels weighty (14.4 oz), solid, and substantial in the hand.

Turns out the chassis is solid––solid wood. Sangean has two options: walnut and dark cherry. Of course, my sample is a black version which may appear later in the year.

And the WR-7 is as simple to operate as it is to…well, hold in your hand. There’s one knob to turn the radio on and select the source (FM, Bluetooth, or the analog AUX input), and another knob for volume.  Just as these photos show.

The tuning knob is the largest knob and moves fluidly across the dial. The analog dial is white with black frequency markings, and is backlit. From my tests, the FM dial is fairly accurate, although the frequency marking steps are a bit odd: 2 or 3 MHz increments starting at 87.5 and ending at 108 MHz.

There is a green LED lamp hidden behind the speaker grill that acts as the FM signal strength indicator. This LED turns blue when in Bluetooth mode.

Performance

There’s not a lot to report on here and, perhaps, that’s why I halted my other evaluations to fit this one in. This radio needs no owner’s manual (though it does ship with one). All you need is a USB charging cable––yep, the same type that likely charges your mobile phone.  And, of course, it ships with one. It also ships with a lightweight cloth-like carrying bag.

You might have noticed that the WR-7 doesn’t have a telescoping whip antenna.  That’s okay, because it also ships with an external wire antenna (which I actually prefer on this type of mini tabletop radio).

The WR-7 has an internal 2600 mAh Lithium-Ion Battery that provides this tiny rig with up to 36 hours of operation between charges. While I haven’t tested this claim yet, I can tell you that its battery life is incredibly good––especially acknowledging that the audio amplifier must be using quite a bit of the battery.

FM

The WR-7 receives the FM broadcast band from 87.5 to 108 MHz.  While the dial is analog, I know there’s a DSP chip inside because I can hear frequency steps while I tune across the band. There is no muting between frequency steps, so the experience of tuning feels somewhat analog. As I mentioned earlier, the dial layout is a little quirky, but overall the frequency markings are pretty close to accurate. I found my benchmark stations with little difficulty.

In terms of sensitivity, the FM receiver is quite good in the WR-7.  I could receive almost all of my local stations with the external FM antenna connected. Of course, you’ll want to connect the FM wire antenna.

With the external antenna connected, I could receive all of my benchmark distant and weak stations as well on the WR-7. While reception is very good, it isn’t quite as good as on my XHDATA D-808, C. Crane CC Skywave SSB, or Tecsun PL-660––the lock isn’t quite as stable––but I probably could have tweaked this by moving the external wire antenna.

Audio fidelity

Thing is, with even a decent FM signal, you’ll be mighty impressed with the audio fidelity of the WR-7. It easily manages to sound like a radio three to four times its size. Truly, the bass that emanates from this tiny speaker is incomprehensibly deep–only limited by the size of the acoustic chamber.

The sound is rich and room-filling when the volume is turned up.

And speaking of turning up the volume, this is one little radio you’ll probably peg at its highest volume setting from time to time. In fact, I rather wish this radio would allow the volume level to reach even a notch higher…but I expect this was a design choice at Sangean. With the volume turned up all the way, the sound is room-filling, but not distorted. While testing the WR-7, I tuned it to a variety of stations and played a wide range of music through it via Bluetooth: I never noticed bass-heavy songs distorting the audio. I suspect if the volume could be increased even further, the audio would indeed distort a bit.

In short: though you might occasionally turn up the volume on the WR-7 all the way, you’ll be pleased with the results––even across the room!

Bluetooth

I’m not sure what to say about Bluetooth; to me this is a technology that seems to work quite well for wireless connections between mobile devices. The WR-7 has built-in Bluetooth Technology Version 4.1, and it worked flawlessly with all of my mobile devices as well as my shack’s PC.

For a full week, I used the WR-7 as the speaker for my shack computer, and it was most impressive. In fact, it makes for a nice compact external speaker to pair with my SDR applications. AM audio, piped through Bluetooth into the WR-7, is a treat.

For a few nights, I even streamed OTR productions of “Buck Rogers in the 25th Century” with my shack computer, connected to the WR-7 via Bluetooth. The WR-7 was actually in the adjoining room, yet the Bluetooth connection was strong and never dropped the audio. The resulting sound was nothing short of amazing: if you closed your eyes, it almost sounded like a valve set from 1939.

And that’s another thing about the WR-7 worth noting: It’s so small and so simple in design, it fits in anywhere, and isn’t in the least obtrusive, all while filling the room with its warm, rich sound.

Summary

Every radio has its pros and cons. When I begin a review of a radio, I take notes from the very beginning so that I don’t forget some of my initial impressions. Here is the list I formed over the time I’ve spent evaluating the WR-7.

Pros: 

• Superb, room-filling, rich audio especially considering its very compact package
• Very good FM sensitivity
• Internal battery powers it for dozens of hours between charges
• Easy to recharge via any 5VDC USB source
• Easy Bluetooth connection and brilliant audio
• Simple operation

Cons:

• Volume and selection knobs could be slightly small for some users’ hands
• Volume range more limited than most, upper volume capped
• Although it does come with a nice lightweight carrying pouch for traveling, you might wish for a little extra protection in a suitcase or carry-on bag

Radios like the Sangean WR-7 give me hope that consumer electronics might be heading back in what is, in my humble opinion, the right direction: that is, toward quality.

The WR-7 is really a quality piece of kit: it has a solid feel (imparted by solid wood), has an acoustic chamber that produces excellent audio, and you can tell that the FM receiver wasn’t simply an “add-on” feature, as it works quite well.

While you won’t see many radios like this reviewed on the SWLing Post, I’m glad I agreed to take on this one.  It was an fun exercise, and reminded me why I love doing radio reviews: sometimes these digital marvels really surprise me. That, and I’m enough of a radio and consumer electronics geek to bask in the indulgence of pure listening!

Good one, Sangean! Accolades!

Click here to view the Sangean WR-7 on Amazon.com (affiliate link).