Swiss Army Knife FM antenna

Many thanks to SWLing Post contributor, Balázs Kovács, who shares the following video of a Swiss Army knife and tweezers being used as FM antennas:

Click here to view on YouTube.

Thanks for sharing this, Balázs. The video actually makes a good point: it takes so little to make an effective FM antenna to receive local stations. I’ve been with repair technicians when working on radios They’ll often use their precision screwdriver as an antenna to test the receiver before reassembly.

I also carry a couple cheap instrumentation patch cord with alligator clips on both ends to act as a short antenna or antenna extension when needed. Honestly, It’s amazing how often I reach for them!

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AE5X notes: Beware of counterfeit Elecraft K3S transceivers

Many thanks to SWLing Post friend John (AE5X) who posted the following warning on his blog regarding “Esthetic upgrade kits” to make an Elecraft K3 look like a K3S.

From the AE5X blog:

If you’re in the market for a used K3S you might want to pay extra diligence to what you’re actually buying.

An eBay seller “xtreme830” is selling Esthetic upgrade kits that can be added to a K3 to make it look like a K3S. As always, buyer beware.

K3S serial numbers begin with #10,000.

Thank you for the warning, John! That’s a little crazy, in fact. I would be most concerned about people buying esthetically altered K3 transceivers at hamfests where one often forgets to check serial numbers. Buyer beware!

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“Direkt aus Tamsui“ 2019 broadcast schedule

Many thanks to SWLing Post contributor, G. Koopal, who shares the following analog and DRM broadcast schedule for “Direkt aus Tamsui“ (“Direct from Tamsui”).

Aktion “Direkt aus Tamsui“ 2019

Testsendungen am 16. August (Freitag)

ANALOG

Frequenz 11990 kHz (325): 17:00-17:05 UTC
Frequenz 9540 kHz(315):  18:00-18:05 UTC

DRM

Frequenz 11990 kHz:  17:15-17:20 UTC
Frequenz 9540 kHz:   18:15-18:20 UTC

Offizielle Sendetermine:

11990 kHz  1700-1800 UTC
9540 kHz   1800-1900 UTC

30. August (Freitag) / analog
31. August (Samstag) / analog
01. September (Sonntag) / DRM
06. September (Freitag) / analog
07. September (Samstag) / analog
08. September (Sonntag) / analog
13. September (Freitag) / analog (Mondfest)
14. September (Samstag) / analog
15. September (Sonntag) / DRM
20. September (Freitag) / analog
21. September (Samstag) / analog
22. September (Sonntag) / analog

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The Ham Radio Workbench 12 VDC Power Distribution Strip Kit

I had a number of important plans and goals yesterday which I conveniently set aside to build kits instead. Have you ever had one of those days?

Building kits is a little like therapy for me. I find it relaxing, fun, and it gives me an opportunity to tune out everything else in the world while that soldering iron is hot.

The first kit I built was one I purchased this year at Hamvention: the Ham Radio Workbench 12 VDC Power Distribution Strip.

I’ve been on a search for two types of fused Anderson Powerpole distribution panels: a portable one for the field with at least 4 ports, and a large one for the shack with 12-16 ports and at least two USB 5VDC ports.

Sadly, there is no large one on the market that I would like right now. I checked every vendor at Hamvention and the Huntsville Hamfest this year and while there are large panels available, none of them have USB ports. That and the price for a 12-16 position DC distribution panel can easily exceed $120.

As for the small panels for field use, many of them are a bit too bulky and pricey. The inexpensive ones lack individually fused ports.

My buddy Dave (K4SV) knew I was on the hunt, so at Hamvention he directed me to the Ham Radio Workbench podcast table. There, I found the ideal portable solution in kit form.  And the price?  A whopping $25.

Take my money!

Yesterday, I built the kit in near record time. It went together so fast, I forgot to take progress photos.

What I love about this DC distribution kit is it actually has more features than other products on the market:

  • There’s a green LED to indicate power has been applied to the panel and a red LED to indicate any faults
  • Each position is individually fused with standard blade fuses
  • Each position also has a red LED to indicate if the fuse has blown

I also love the size and configuration.

The kit does not come with an enclosure or base of any sort, so I had planned to simply attach it to a dielectric plate to prevent the bottom of the board from shorting on a conductive surface.

This morning, however, I discovered a 3D-printed enclosure from Rocket City 3D:

This enclosure protects the entire panel on all sides so I’ll be able to throw it in my backpack and not worry about the connectors snagging on other items. The price is a reasonable $12 shipped. Done!

This little DC panel pairs well with the 4.5 aH Bioenno Lithium Iron Phosphate battery I purchased on sale at the Huntsville Hamfest. Together, they’ll power the portable SDR system I’m putting together. More on that in a future post! Stay tuned!

Click here to check out this kit at HamRadio Workbech. It’s currently out-of-stock, but you might contact HRW and see if a future run is in the works. Click here to check out the custom enclosure from Rocket City 3D.

UPDATE: I understand Ham Radio Workbench may eventually print the circuit boards for this project. In the meantime, another affordable option I’ve used is this pre-built panel from Electro Sales on eBay: https://ebay.us/UyJPkh


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Next on Encore: Classical Music on Shortwave

Encore – Classical Music on Shortwave – Broadcast on Sunday afternoon in Europe and USA

Encore – Classical Music this weekend is being broadcast as usual by Channel 292 (Europe) on 6070 kHz at 15:00 UTC Sunday 25th August.
And by WBCQ on 7490 kHz at 00:00 – 01:00 UTC Monday 26th August
There is a repeat on 6070 kHz on Friday 30th August at 19:00 UTC.
This week’s show has quite a lot of Xylophone, but also a Strauss lieder, some Tchaikovsky, Schubert – a piano duet played by Richter and Britten (people forget what an extraordinary pianist Britten was).
There will also be some Vivaldi, Debussy, and a treat from Brahms to finish with.
Both Channel 292 and WBCQ do live streams if the reception is poor in your location. Easy to find their sites with a google search.
Thank you for spreading the word about Encore – Classical Music on Shortwave. And thank you to everyone for letting us know how well/badly the signal is received where you live.
Brice Avery – Encore – Radio Tumbril.
Regular Broadcast times are:
15:00 – 16:00 UTC Sunday, and repeated 19:00 – 20:00 UTC Friday on 6070 kHz (Channel 292 Germany).
00:00 – 01:00 UTC Monday on 7490 kHz 9WBCQ – Maine).
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AirSpy HF+ Discovery: First Impressions on Medium Wave vs. Elad FDM-DUOr

The highly anticipated AirSpy HF+ Discovery SDR has been in the hands of early adopters for about two weeks–and I’ve seen nothing but positive comments!

After a long run (2007-2013) with a Microtelecom Perseus, my SDR of choice became the Elad FDM-S2, and more recently an Elad FDM-DUOr “hybrid” SDR receiver. The two Elads have the same core processing components and identical performance when the DUOr is connected via SDR software.

This week I’ve compared the HF+ Discovery ($169) against the FDM-DUOr ($899) using Studio 1 software and identical modes & settings. The following video features the radios’ performance on a crowded daytime medium wave band from suburban Seattle-Tacoma USA.

https://www.youtube.com/watch?v=vkQQeF2edCU

Click here to view on YouTube.

Notes:

  • Software used is two “instances” of Studio 1, version 1.06e
  • Antenna is an east-west oriented Wellbrook ALA1530LNP Imperium loop
  • Mode, filter bandwidth, AGC, etc. are the same for each radio
  • 768 kHz sampling bandwidth used for both receivers

Stations tuned are:

  • 1320 KXRO Aberdeen WA, 74 miles @ 5 kW (in-line with antenna)
  • 1110 Oak Harbor WA, 78 miles @ 500 watts (in antenna’s null)
  • 1040 CKST Vancouver BC, 147 miles @ 50 kW (in antenna’s null)
  • 1430 KBRC Mt. Vernon WA, 85 miles @ 5 kW (in antenna’s null)
  • 750 KXTG Portland OR, 118 miles @ 50 kW (in antenna’s null)

I purposely sought out signals difficult to hear in the presence of powerhouse stations. Only 1320 kXRO (in-line with my antenna) and 750 KXTG are what you might consider average or fair quality signals. Headphones are recommended for most of these, particularly 1040 kHz.

You’ll note that the pass band has been “pulled” over the edge of the carrier frequency by a few hundred Hertz. This is an excellent trick that can often reduce noise and/or improve intelligibility. It’s a feature unique to Perseus, Studio 1, and SDRuno software; it works in sideband modes and in selectable sideband Sync AM (SAM) mode.

After listening to the signal comparisons, what are your thoughts on the HF+ Discovery? Please leave your comments below.

Guy Atkins is a Sr. Graphic Designer for T-Mobile and lives near Seattle, Washington.  He’s a regular contributor to the SWLing Post.

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SAQ receives 438 listener reports

Grimeton VLF mast

(Source: Southgate ARC)

Alexanderson Alternator station SAQ says it received 438 listener reports — ‘an incredible amount’ — for its June 30 Alexanderson Day transmissions from Sweden including 8 ‘super’ DX reports, five from the USA and three from Canada.

The historic electro-mechanical transmitter, which dates back to the 1920s, is fired up periodically throughout the year on 17.2 kHz.

“We are very thankful for all your enthusiastic and positive feedback, with images, recordings, videos, and even Morse ink writer strips,” SAQ said.

The station is a World Heritage Site in Grimeton, Sweden and SAQ’s June 30 message commemorated the 100th anniversary of the first east-to-west transatlantic voice transmission from the Marconi station in Ireland to Cape Breton Island, Nova Scotia.

SAQ has posted an interactive map showing the locations of all received listener reports from recent transmissions and video of the Alexanderson Day transmission event has been posted to its YouTube channel.

https://www.youtube.com/user/AlexanderSAQ/videos

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