Category Archives: Accessories

The Eco USBcell: a LiPo AA USB rechargeable cell

EcoUSBCell

Many thanks to SWLing Post reader, Steven Crawford, who writes:

Avid follower of your SWL Blog and site. I saw these and thought your followers may find these AA and AAA lithium ion USB rechargeable cells may be of interest as they are limited to 1.5 volts. I’m interested for my C. Crane Pocket SW and Sony ICF-SW7600GR as well as for various Mag Instrument flashlights.

An excerpt from PCWorld:

Card-carrying members of the Radio Shack Battery of the Month Club, get ready to salivate: The Eco USBcell is the most exciting development we’ve seen in rechargeable batteries in a long time.

Unlike most rechargeable AA and AAA cells that use nickel metal hydride chemistry, the USBcell’s are based on the same advanced lithium polymer technology that’s used in many smartphones.

That may not sound like a big deal, but one limiting factor in using LiPo in a AA or AAA battery is voltage. LiPo and Lithium Ion’s typical minimum voltage is 3.7 volts and would fry a standard device looking for 1.5 volts.

The Eco USBcell features a power control chip to match the voltage to the standard disposable alkalines we’re used to.

[…]And that’s not even the slick part of the USBcell. Once the battery is dead, you simply pull the top off to reveal a standard USB Type A port. That means there’s no need to carry a charger anymore. Plug it into a 1 amp wall-wart charger and it’ll be topped off in about two hours, even flashing an embedded green LED to let you know. The company says it can technically be charged on a computer’s USB port, but it’ll be a lot slower.

Click here to read the article in PCWorld.

ECOusb-aaThanks, Steven! This is a very cool product, indeed! I noticed that, on BestBuy, there are currently six reviews–dating back to October ’15–with a full 5 star rating. Not bad.

With USB ports and chargers being ubiquitous in our world, I can see where charging these would be very convenient.

My only hesitation is that I have a healthy fear of LiPo batteries after having a GoalZero LiPo pack melt down and burn on my bed while charging once. That was three years ago, however, and charging circuits have become much more reliable since then.

I’ll put these on my wish list and purchase them later in the year if the reviews remain positive. I just purchased a 12 pack of Panasonic Enloop cells, so I’m in no hurry.

Thanks again for the tip, Steven!

By the way, if you’re confused by various battery chemistries, check out our recent rechargeable battery primer by clicking here.

A high-gain ferrite bar antenna for the PL-360/PL-365 and CountyComm GP5 series

Ferrite-Bar-Antenna-PL-365-GP5SSB

If you own a Tecsun PL-360, PL-365 or a CountyComm GP5/DSP or GP5/SSB, you might take note of this large ferrite bar antenna offered by a Greece-based seller on eBay.

Ferrite-Bar-PL-365

As you can see in the image above, this antenna is substantially larger than the stock MW antenna supplied by the manufacturer. According to the seller, this ferrite bar antenna has a 10 – 25 db gain over the stock external antenna. I imagine its ability to null unwanted signals is also much better.

The price is about $40 US shipped internationally.

Have any SWLing Post readers ordered this antenna? If so, please share your comments/reviews.

Click here to view the antenna on eBay.

SWLing Post reader, David Korchin, also shares the following demo video on YouTube:

Many thanks to SWLing Post readers, Francis Frankenne and David Korchin for the tip!

Looking for SWLing Post gear? We’ve got you covered!

Over the years, readers have often encouraged me to create SWLing Post shortwave radio-themed products, which is to say, t-shirts, coffee mugs, and the like. But for some reason, I’ve never gotten around to it.

That is, until now…

SWLingPost-DXFiend-Vintage-Front

What finally motivated me to create these items is a friendship:  I’m fortunate to number among my friends the amazingly talented Jeff Murray (K1NSS) of Dashtoons.  It occurred to me that I might commission Jeff to design some shortwave radio-themed graphics that represent the broad spectrum of radio enthusiasts here on the SWLing Post. Jeff, ever enthusiastic where radio is concerned, was the perfect artist for the job–particularly since he and I see eye-to-eye on the beauty of both radio innovations and radio nostalgia.  And with Jeff’s quirky sense of humor to enliven his sharp, dapper graphics, the great results you see here were simply inevitable.

SWLingPost-DXFiend-SDR-Front

Of course, his pictures speak louder than my words.  As I’ve said, Jeff’s clearly a graphic artist par excellence, and it certainly doesn’t hurt that he really knows radio–inside and out.

SWLingPost-DXFiend-Vintage-Back

While he was at it, Jeff created an SWLing Post logo that will soon accompany a refreshed Post design I’ve had in the works…stay tuned for that as the new year approaches.

SWLing-Post-Women's-T-shirtIn the meantime, I thought I’d share a link to a simple CafePress webstore I’ve put together for our newly-minted swag.

Click here to view great SWLing Post gear.

So far we only have a few select items on offer, but I’ll soon be adding more. But we do have two great t-shirt and coffee mug designs available now:  the Radio Waterfall design features the SWLing Post logo superimposed over a blue SDR waterfall, with the words “DX FIEND” emblazoned beneath; the Radio Nostalgia design features the above vintage-style radio image, with”DX FIEND” beneath, and the “SECRET WORLD” image on the back. Take it from me, they look great.

Let me know if there’s something in the CafePress catalog you’d like to own featuring Jeff Murray’s terrific radio art, and I may be able to put it out there for you.

SWLingPost-Shirt-FrontOh, and by the way–a small percentage of your purchase (typically between $2.00-4.00US) goes towards keeping the SWLing Post online. The rest of the cost goes to CafePress’ product base price. True, I doubt we’ll ever sell enough to break even this way, but who cares…! After all, I do all this for fun, not profit.

Plus I confess to a little personal motivation: I really wanted a Jeff Murray-designed mug for my own cuppa joe!

The great thing about CafePress–although slightly pricey for some items–is that they offer great products, great customer service, and a no-questions-asked return policy. I like that.

large_mug_sdr_waterfall_mugsSo, if you take a leap of faith and purchase one of our items, please comment and let me know how you like it!

Side note: If you ever need amazing custom artwork for your QSL cards, your company, or your shack, I highly recommend Jeff Murray. He worked with me over the course of a week to nail down these incredible designs, and wowed me with his powerful creativity every step of the way.  It was worth every single penny and more, and an honor to work with him, which is why I hope to have him create even more artwork next year! Thanks, Jeff!

And thanks to our Post readers for your purchase!  Go ahead–join me in a hot cuppa!

eBay: Mario considers the Time Out Radio Bench

Time-OutRadio-Bench-001

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN), who writes:

Hi Thomas,

For hams and SWLs that have a lot of clutter, a great idea, reminds me of a foot stool that has been re-purposed for radio buffs. Nice idea, good price, free shipping, what’s not to like? My spending finger’s getting itchy hi hi.

Click here to view on eBay.

I’m with you, Mario: this is not a bad price for a useful and portable shelf that is even made here in the USA (Kentucky). I could see using one on Field Day where horizontal space is often limited on club tables.

It appears that the seller (a ham: Ron, KK4RON) purchased a large number of these in a deal. He writes this in the product description:

These benches are great for setting up a compact ham station or use 3 for a surround set up , They also stack nicely if you only have a narrow space available. Go UP rather than out.

These are very sturdy and well made in the USA by a factory in Kentucky , the surface is a very durable and easy clean kitchen cabinet material (Formica) on 3/4″ wood so screwing on mounting brackets and mike holders and such is very easy

These were intended to sell for $49.95 but the company that ordered them went out of business before they had payed the factory so the factory got stuck with literally thousands of these finished and ready for sale.

We were able to acquire there entire inventory including boxes and packaging at a fantastic price but that is also why we are limited to 8 colors and 2 top colors. But these are very well built from a factory (not home made) and just perfect for mounting several radios to and cleaning up your bench.

Again, many thanks, Mario, for sharing this find (and perhaps it’s time to get yourself an early Christmas gift?)!

Reminder: Only two days left to enter our latest radio challenge!

Click to enlarge

Enter our challenge and you could win this prize package worth over $200 courtesy of CountyComm!

Let’s imagine that your area suddenly loses power–as well as cell phone and internet service–for an indeterminate period. Home and personal electronics remain unaffected, but must be powered off-grid (without mains power).  Moreover, you may be required to evacuate your home…perhaps even on foot.

In preparation for this event, what portable radio kit would you assemble?  

Submit your answer to this question and you could win a preparedness prize package courtesy of CountyComm!

All entries must be received by November 21, 2015.

Click here to read about this challenge and how to submit your answer!

New kit by NM0S: the 4S-Tuner/Antenna Coupler

4stuner_panelDave Cripe (NM0S) has designed yet another QRP kit for the 4 State QRP Group: the 4S-Tuner/Antenna Coupler.

Description (per Four State QRP Group):

This excellent random wire antenna tuner is the classic T-Match design which is known for wide matching range and smooth operation. Dave has added a nice wrinkle – the SWR indicator employs TWO leds, not the normally seen single red LED. A green one indicates output power with a red one indicating reflected power. The beauty of this arrangement is that the operator sees the output power peaking as the SWR goes down, just like a power meter with dual meters – very intuitive. This makes tuning easier and leaves no doubt that it’s tuned for maximum power output. For a high SWR the red LED is at full brightness and the green LED is off. At 2:1 both are at equal brilliance. At 1:1 the green is full on and the red is off. The small size is perfect for portable operations. Add this dandy little tuner to your portable ops go bag, or use it at home. It’s equally at home on a picnic table, in a tent or camper, as well as on the operating desk in your shack.

Specifications and Design Features

  • Wide tuning range: 80 meters thru 10 meters. Tested on EFHW and 100′ wire.
  • Maximum Power Throughput: tested at 10 Watts.
  • Low loss large toroid
  • Twelve taps for small inductance step selection.
  • Low insertion loss when matched.
  • Enclosure Size: 3″x3″x2″.
  • Pittsburg Construction.

Shipped price is $51.00 (US), $55.00 (Canada), $60.00 (Outside US/Canada).

Dave Cripe designs excellent kits for the ham radio community; they’re easy to build, fun and functional.  If this kit is as popular as his past kits, the first run will most likely sell out in short order.

 Click here to check out the 4S-Tuner/Antenna Coupler at the Four State QRP Group website.

Bill’s simple Sony SRF-59 passive loop antenna modification

Sony-SRF-59-AM-Loop-Antenna

In reference to our previous posts about the Sony SRF-59 ultralight receiver, SWLing Post reader, Bill Mead, writes:

“As someone who doesn’t normally open the backs of radios, this is my mod on my ultralight. All it takes is a bit of electrical tape to hold the belt clip on the loop.”

That is, indeed, a brilliant and simple mod. The SRF-59 inductively couples to the loop antenna, so no soldering is needed; simply tape the belt clip to the loop, making sure the position is convenient for tuning the SRF-59 and the loop’s capacitor.

You can find passive loop antennas ranging from $19 to $50 US. The Grundig AN-200 and the Terk AM Advantage are two models currently on the market. Here are a few places you can check prices:

Grundig AN-200:

Terk AM Advantage: