Category Archives: News

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

November 10, 2015 k4swl 2 Comments

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

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.

News, Product Announcements

The Siru Innovatios SDR20 multi-touch portable SDR

June 5, 2015 k4swl Leave a comment

[Note: this post was originally published on my shortwave radio blog, the SWLing Post.]

A few weeks ago, at the Four Days In May conference (held alongside the Dayton Hamvention) I met Jarkko Mäkivaara from the Finnish company Siru.

Jarkko was demonstrating the SDR20: a radio that immediately grabbed my attention from across the room. The SDR20 is a fully portable, robust, multi-touch portable SDR transceiver.

The screen on the SDR20 is as responsive as an iPad and fully developed around SDR functionality. While Jarkko didn’t have an HF signal of any sort inside the hotel convention room, I was able to play with the interface a bit, which I found rather intuitive.

The SDR20’s product brochure lists some of its features:

2-channel transceiver operation
Two methodologies for implementation: IQ Mod / Demod and Direct Down and Direct Up (DDC, DUC) conversion
Up to 200MHz bandwidth per channel
100mW transmit power. Higly efficient 1kW exciter available separately.
Frequency range covers DC to 2.5 GHz
State of the art Altera Cyclone SOC-FPGA (Including dual-ARM9 Cortex)
Graphics Prosessor accelerated Multi-Touch screen with a slick user interface
GNURadio, C++ API/Python, VHDL/Verilog/High Level Synthesis sandbox
High-speed ethernet interface for computer connection
Internal clock 20 PPS
Coherent operation with external clock source (GPS, Rubidium etc.)
Rugged and stylish enclosure / Rack mount

Of course, the SDR20 is truly designed for industrial and government/military applications, thus it carries a price tag reflective of those markets: €3,395.00 (about $3,800 USD).

Still, seeing the SDR20 gives me hope that multi-touch, portable SDRs will become more commonplace as capacitive screens, processors, DSP chips and solid state storage continue to decline in price. Indeed, I wouldn’t be surprised if Siru is able to lower the price on future iterations of their portable SDR line.

If you would like to take a look at some of the SDR20’s specifications, check out this PDF product sheet and the video embedded below. Of course, you’ll find even more information and updates on Siru’s website. The SDR20 has shipped to Beta testers and should begin full production in the fall.

Announcements, News

RKR Designs have acquired Alpha Amplifier and TEN-TEC brands

April 3, 2015 k4swl 3 Comments

(Source: TEN-TEC Press Release)

(April 2, 2015) RKR Designs, LLC of Longmont Colorado has announced that they have acquired the assets of Alpha Amplifier and TEN-TEC brands from RF Concepts. RKR plans to expand the product line, while continuing to service their customers that have enjoyed their products over the years.

The principals of RKR Designs are Richard Gall, Ken Long and Rich Danielson (Gall and Danielson of QSC Systems, Longmont, Colorado have been a successful contract manufacturer, for over 20 years). Ken Long, N0QO has over 20 years in the electronics and amateur radio industry. Long will be President and CEO of the new company. QSC has been building Alpha amplifiers for over 5 years. They have also been building boards for TEN-TEC since their purchase by RF Concepts last year. Mr. Long said “QSC has always been a fantastic contract manufacturer, and has the expertise and knowledge that will allow us to bring down costs, while increasing quality and reducing manufacturing times.”

When asked for comment, Michael Seedman, AA6DY said “I can’t think of a more capable group of people to take over the 45 year Alpha Amplifier/TEN-TEC legacy. Ken Long has been involved with the industry for years, and has a great feeling for products and operations. He has the manufacturing and engineering resources available to deliver quality products that our customers demand”. Mr. Seedman went on to say “Alpha and TEN-TEC have always had a warm spot in my heart, and I am thrilled that RKR Designs will be able to continue the operations of the business. I wish them the best”.

Ken, Richard and Rich have been working very close over the past several years and feel that this new relationship will benefit the company and customers moving forward. This closer relationship to the contract manufacturer will allow a more consistent process and delivery of quality products along with significant cost benefits.

RKR Designs LLC is privately held, and terms of the acquisition were not disclosed.

Events, News

Application for ARRL Centennial Awards Now Available

March 26, 2015 WD8RIF Leave a comment

The application window for the ARRL Centennial Points Challenge and the W1AW Worked All States Award is now open. Read the ARRL press release here:

http://www.arrl.org/news/arrl-centennial-points-challenge-w1aw-was-awards-application-window-open

Morse Code, News, Product Announcements

Bencher, Inc. sold to Vibroplex, LLC

March 19, 2015 k4swl Leave a comment

(Source: Scott Robbins W4PA, Vibroplex)

Press Release – March 18, 2015

Bencher, Inc. of Antioch Illinois announced the sale today of the Bencher Amateur Radio product lines to Vibroplex, LLC of Knoxville, Tennessee. This sale ends Bencher’s presence in the amateur radio field, thus allowing the principals, Jere Benedict, President, and Bob Locher, (W9KNI) to move towards retirement.

The product lines sold include the Bencher BY series of Iambic Paddles, (the world’s best selling iambic paddle, with over 150,000 sold) as well as the ST series of single lever paddles, the Bencher Hex Paddle, the N2DAN Mercury Paddle, and the Bencher RJ series Hand Keys. Also included in the sale are the HK-1 Universal Hook-up kit and the YA-1 Low Pass Filter.

Vibroplex has agreed to honor the manufacturer’s warranties of all covered products, and to offer parts and support for these products as well.

Vibroplex will continue to offer the Bencher products through existing marketing channels.

Vibroplex may be contacted at http://www.vibroplex.com, or at (865) 309-5073.
Jere Benedict and Bob Locher wish to express their gratitude to the amateur radio community for its interest and support since the sale of the first Bencher amateur radio products in the early 1970’s.

Hams, News, Videos

This African ISP commercial may be the best amateur radio promotion. Ever.

March 17, 2015 k4swl Leave a comment

Many thanks to my buddy Ulis (K3LU) for sharing this brilliant commercial:

Kits, News, QRP

RadioShack liquidation sales

February 16, 2015 k4swl Leave a comment

[Note: This post was originally published on my shortwave radio blog, the SWLing Post.]

One of my local RadioShack stores is closing and liquidating all of the merchandise and store fixtures. I’ve visited the store twice and found that the best bargains come from the components cases where everything was marked at least 70% off.

I purchased about $60 worth of components like those above: test leads, connectors, plugs, adapters, RG-58 cables, fuses, breadboards, etc. Two packs of PL-259 crimp on connectors, for example, were about 70 cents each. Those prices are much better than you would find at a good hamfest; so I stocked up!

Several of you have commented about your local RS deals as well–SWLing Post reader, Troy, writes:

The Radio Shack® Digital Recorder you blogged about a few months back is marked down to $2.98 at Radio Shack stores – if it can be found. I drove 43-miles one way to buy one today. Despite gas and a $3 highway toll, I’m happy.

Radio Shack online inventory has historically been abysmal and given that stores are closing I’d encourage your readers to call stores – even if stock is listed as unavailable.

I haven’t tested it yet but from a previous post it appears software can convert the audio from mono to stereo. I’m sure I can figure it out with my MacBook Pro, but if not – given the modest expenditure – I’m satisfied nonetheless.

Many thanks, Troy!

If you are interested in snagging deals, you should act now. There is very little left in my local store and, according to a district manager I spoke with, items are moving as quickly in other regional stores. From reader reports, this is the case across the country.

Keep in mind: not all RadioShack stores are closing. Many franchise and corporate stores will remain open, at least for the time being.

Click here to view a list of all RadioShack store closures.

Announcements, News

Working K1N: The Navassa Island DXpedition

February 9, 2015 k4swl Leave a comment

Lighthouse OP at night LED lighting (Photo: k1N DXpedition)

While I love QRP and ham radio in general, I must admit that I’m not much of a DXer. I love the idea of DX, but at this point in my life, it’s hard to make time for it and, frankly, my CW skills are somewhat lacking.

I owe many thanks, though, to my good friend, Vlado (N3CZ), who sat with me yesterday at his QTH and coached me through working K1N on 15 meters CW. It was a bit like learning from a Jedi Master…er, Jedi Elmer. At any rate, it felt good to see my call in the K1N log and to know that I worked a station that may not reappear for another 25 years.

If you have the time and patience, you might try working K1N soon. I understand the K1N team announced earlier today that they intend to tear down their stations starting this Saturday. They will go QRT Sunday morning.

News, Portable

Fully-assembled Mountain Topper rigs soon available from LnR

December 21, 2014 k4swl 1 Comment

Many thanks to Chris (K4RCH) for passing along this message from Steve (KD1JV) at LnR Precision:

I am pleased to announce that the 3 band Mountain Topper will be commercially available as a fully assembled product from LnR Precision. They should be available for purchuse around the end of January and will cost $250.00

Steve KD1JV

If you’d like a peek at The Mountain Topper manual, click here to download (PDF).

Steve (KD1JV) is well-known for his brilliant QRP transceivers–$250 is a true bargain. Check out AE5X’s blog for more info about the MTR.