Category Archives: New Products

Tecsun AN-48X Loop Antenna: One simple suggestion to improve performance

Many thanks to SWLing Post contributor, Robert Richmond, who writes:

I recently received the new Tecsun AN-48X loop antenna. I have not had much time to thoroughly test it, but I can make one immediate recommendation IMO. Replace the bundled “feedline” between the loop and controller with an actual *shielded* 1/8″ male-to-male stereo audio cable.

The bundled cable causes near-hand capacitance at the controller, potential RFI issues, etc.; at least for my received unit. The noted concerns largely corrected when replacing the bundled cable with a 6′ shielded audio cable. Tuning now works as expected, and SNR seems much improved.

I have longer 12′ shielded cables and some 1/8″ female-to-female couplers on order to eventually try longer feedlines should the need arise. I will try to drop you a line if/when I get around to testing them.

That’s a sound suggestion, Robert! Thanks for sharing!

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Assembling the uBITX V6 QRP transceiver

Last Friday, after returning from holiday travel, I found a belated Christmas gift on my doorstep: the new uBITX V6 QRP transceiver.

In the spirit of full disclosure, this package wasn’t delivered by Santa, rather by DHL in record time from India. As I mentioned in a previous post, I simply couldn’t resist purchasing such an affordable general coverage transceiver.

To be clear, the uBITX V6 isn’t really a kit. The boards are all fully populated by a women’s cooperative in India. You can purchase the uBITX V6 for $149 without a chassis and for $199 with a custom metal chassis. I purchased the latter.

Assembly may take thirty to forty minutes following HF Signals’ online guide. I employed my twelve year old daughters who pretty much assembled the entire radio–I only helped seat the display to the main board.

There is no firmware or software to upload. Simply assemble the radio, solder a power cord to the supplied coaxial plug (hint: positive tip polarity), connect an antenna, connect a power supply, and turn it on.

You’re on the air!

So far, I’ve only scanned the bands and listened to QSOs and broadcasters (no AM mode, so I’ve been zero-beating stations in SSB). Today, I hope to chase a few parks via the Parks On The Air program.

I still need to calibrate the radio yet (although it does zero beat WWV perfectly).

If you purchase the uBITX V6, don’t expect a benchmark transceiver. This uBITX V6 feels more like a work-in-progress and I assume the pre-loaded firmware is simply a first iteration.

Since the radio is open source, I expect hams will soon hack this rig to go above and beyond its basic (understatement alert–!) feature set.

If you’re a CW operator, you might hold off on purchasing until someone has properly implemented the mode. I made some test CW CQs into a dummy load just to check out the keyer and I honestly don’t think I could manage a proper QSO at this point. Sending is sluggish and…well…awkward.

Note that I will be writing a full review of the uBITX V6 for a future issue of Radcom (the RSGB’s monthly publication). Check back here for uBITX V6 notes along the way.

Also check out the excellent blog of our friend, John Harper (AE5X), who has also recently put the uBITX V6 on the air!

Anyone else order a uBITX V6? Please comment!


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The Global Radio Guide: Winter 2019-2020

Many thanks to SWLing Post contributor, Dan Ervin (KB0RTQ), who writes:

Just in time for the new year, the Winter 2019-2020 edition of the Global Radio Guide is available on Amazon in e-book form for $8.99.

Click here to view on Amazon.com (affiliate link supports the SWLing Post).

I first learned about this guide thanks to you and the SWLing Post, and their content and “Hour by Hour” listening guide reminds me of the old “Passport to World Band Radio” of days gone by.

73, and here’s to a wonderful 2020!

Thank you so much for the tip, Dan! I should mention that the guide also has a substantial introduction section with articles, propagation forecasts, and product reviews.

 

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Mike reviews the Retekess TR608 AM/FM/AIR/SW receiver

Many thanks to SWLing Post contributor, Mike S, who shares his assessment of the Retekess TR608. Mike writes:

For this model, the company marketing electronics under the Retekess brand seems to be using a different supplier compared to the previous digital-radio-plus-memory—card-player products. The result is a more traditionally styled multiband DSP radio which runs on (gasp) traditional AA batteries. Its feature set takes inspiration from the Radiwow R108 and original CCrane Skywave, but with mixed results (albeit at a fraction of the price). It delivers decent performance for its price class but more serious listeners would be advised to spend a little more on a more established model.

Pros

    • Usual set of features: sleep timer, alarm, scanning, auto memory fill.
    • Uses replaceable alkaline or NiMH “AA” cells.
    • Decent sensitivity across the board.
    • Full shortwave coverage.
    • Frequency display is large and contrasty.
    • Dial light is effective and can be disabled. Display is readable without it, even in dim light.
    • No annoying keypad “beep”, so no mad rush to discover how it can be disabled.
    • Speaker can play reasonably loud without distortion.
    • FM reception is solid with good frequency response and stereo reception through headphones; this also activates a display indicator.
    • MW/SW reception is NOT plagued by digital hash bleeding through from the processor as with most other models in this price range!

Cons

    • Significantly larger than expected.
    • Unfortunately the added cabinet space is not utilized for a more wide-range speaker; audio is tinny.
    • Clumsy mounting of one spring in the battery compartment on my sample makes it almost impossible to insert the third AA battery without risking damage.
    • Many keypad buttons are so tiny and almost flush with the cabinet, that they are difficult to press.
    • Lens over LCD display is molded and unpolished with moiré distortion at some viewing angles.
    • Air band reception marred by birdies, bleed-through from other bands, and lack of squelch.
    • Volume control defaults back to level “10” under some circumstances (the manual warns about this).
    • Confusing 2-level LOCK function requires close attention to almost microscopic indicator on LCD.
    • No battery level indicator.
    • Although the manual advises that batteries can be charged using the 4.5V coaxial socket, no charging indicator is obvious.
    • Rotary knob, used for both tuning and volume adjustments, has no detents and so can easily spin off target.
    • Assigned function (no indication) depends on whether the tuning or volume buttons on the keypad were the last to be used.
    • No fine tuning outside of pre-programmed increments.
    • MW selectivity is a bit too wide for congested night reception.
    • MW reception occasionally exhibits weird artifacts; ghost images, sputtering audio on marginal signals, and “processed” sounding voice audio. Don’t know if these are DSP or AGC related, or a mixture of both. I have observed the same thing with the Eton Mini and other inexpensive portables using marginal DSP implementations.

SHOWSTOPPER ALERT: MW band channel assignments marred by 9kHz-centric firmware bug. Even after changing to 10kHz channel spacing (undocumented), the CPU still “thinks” in 9kHz assignments for direct input. Entering FREQ-1-0-1-0-FREQ should get you to 1010 kHz; but it actually lands on 1018 kHz because that is the nearest channel in the 9kHz band plan. You are now stuck in frequency step hell, as the up-down frequency keys still operate in 10KHz mode but do not know they are now off bandplan. UP/DOWN yield 1028/1008, not 1020/1000. The only way to recover is to enter a MW frequency that is the same in both bandplans, or to power off and double-reset the step rate resulting in all memories being lost.

Thank you so much for the review, Mike.  It sounds like this little receiver isn’t ready for prime time yet. The issues with frequency steps on the mediumwave band is certainly a show-stopper for anyone in North America. Indeed, it sounds like mediumwave reception, in general, is mediocre at best. At least the receiver isn’t plagued with internal noises.

With pricing around $29.99-$39.99 it’s certainly a bargain radio. But I’m sure you’re thinking what I’m thinking: you pay for what you get.

The Retekess TR608 can be purchased on eBay or Amazon.com (affiliate link).

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KiwiSDR update brings integrated DRM reception!

Many thanks to SWLing Post contributor, Mark Fahey, who shares the following tweet from KiwiSDR:

“Happy Holidays. Software update brings integrated DRM receiver (Digital Radio Mondiale) based on Dream 2.1.1 to all KiwiSDRs. Stock BeagleBone-Green/Black based Kiwis support one DRM channel, BeagleBone-AI Kiwis support four. Development work continues.”

Ironically, I had only recently published a post asking if anyone had ever attempted to decode DRM using a KiwiSDR. Turns out, several readers had by porting the IQ audio output into the DREAM application. Now that KiwiSDR will have a native DRM mode, this will no longer be necessary.

Many thanks, Mark, for sharing this tip! As you say, this is “mega news!”

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Icom IC-705 price and availability

Note: We will update this post as pricing information is confirmed by retailers.

Many thanks to several SWLing Post readers who have been carefully tracking the price of the Icom IC-705 transceiver which is expected to start shipping around the second quarter of 2020.

Pricing in Japan: 124,800 yen

Paul Evans notes that the price in Japan, according to this Icom Japan press release [PDF], is 124,800 yen + tax. That’s roughly $1150-1200 USD.

Pricing in UK: £1200.

In addition, ML&S have recently posted updated details from Icom UK and have noted that they “anticipate a price of around £1200 (£1000.00 excluding VAT).” To put that in perspective, the IC-7300 is currently being offered for the same price and it’s been on the market a while now.

This could mean that after the IC-705 has been on the market for a while, discounts could place it well below that of the IC-7300. Of course, if history is an indicator, early adopters will likely pay the top price.

Pricing in US: [TBD]

No confirmation yet from US retailers, but at this point, I would bet we could see pricing around $999 USD. That would be a competitive starting point. Of course, once we have confirmation from retailers we’ll update this with actual figures.

Other regional pricing

We will update this post with pricing and availability once we confirm details. Please comment with any tips!


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Radio Deal: New Retekess TR608 AM/FM/SW/AIR intro price of $29.99 US shipped

Many thanks to SWLing Post contributor, John Palmer, who writes:

Hi Thomas,

Just noticed that Retekess has introduced a new AM/FW/SW/Airband! receiver and it’s on sale at a special introductory price ($29.99) till the end of Dec 2019.

Interesting that this one has the commercial aviation band (118-138MHz).

Click here to view on eBay.

Thanks for the tip, John!

Post Readers: Please share your review of this new portable if you grab one!

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