Serving the worldwide community of radio-electronic homebrewers.
Providing blog support to the SolderSmoke podcast:
http://soldersmoke.com
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Just go to http://soldersmoke.com. On that archive page, just click on the blue hyperlinks and your audio player should play that episode.
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Charlie Morris ZL2CTM is working on portable (tramping) transceivers. Check out his amazing and innovative enclosures and circuit boards. Really nice. A great way to keep that beautiful circuitry visible. More details on Charlie's blog: https://zl2ctm.blogspot.com/2019/12/40m-ssb-tramping-rig.html Thanks Charlie. Happy trails! 73
I'm always delighted when I check the SolderSmoke blog and YouTube list (right hand column of the blog) and find a new post from Paul VK3HN. And this morning's post is especially good. Paul has built an AM receiver. Above you can see his video. Here is his blog post with details: https://vk3hn.wordpress.com/2019/12/06/8-band-superhet-am-receiver/ This is the kind of blog post that makes you want to heat up the soldering iron and start searching through the junk box. I'm thinking about putting Paul's 6 kHz filter in my 40 meter HRO-ish receiver. And I may make use of his AM detector circuit. And maybe I can put that same receiver on 75 and 160... And then there are the SW broadcast bands... See what I mean? Thanks Paul. 73
So yesterday morning I was calling CQ on 40 meters with my ET2 two-transistor 100 mW rig. Later, I took a look at the Reverse Beacon Network (RBN). Among the East Coast skimmer stations that regularly pick me up I saw an outlier: WA7LNW in Utah. He's 1950 miles from me. And the RBN reported that his receiver had me at 26 db above the noise.
Here is a screen shot of the RBN report. Note the time: 1234 UTC. Around sunrise here -- so gray line conditions.
But the really BIG factor explaining that 26db s/n ratio is WA7LNW's location:
"Realtime spots are being received at this location and uploaded to the Reverse Beacon Network."
"CW Skimmer antenna is located on cliff edge overlooking the Virgin River Valley, 1,200 ft. below."
On December 1, 2019, my 100 milliwatt signal flew more than 500 miles to reach Tony W4FOA in Chickamauga, Georgia. And -- icing on the cake -- this was a random contact. Tony just heard my CQ on 7038 kHz -- he had not been alerted to my CQ by any spotting site or by the SKCC Sked page. I made a quick video of my side of the contact (above). In a follow-up e-mail Tony explained how my CQ sounded to him:
"I was just listening on the 40 meter band and having been a QRP'er for 50+ years, I tend to notice the weaker stations, thus explains my calling you. Also, your signal had that little "sound" of "yesteryear" when signals were not all pure, hi. Had it not been for the QSB and QRN we could have had a long chat despite the weak signal from your QRPp. Over the years I have QRP DXCC, 2 way QRPARCI WAS, and my best DX was two QSO's with 2 different VK7 stations on 40 when I was running 1 watt. I've had a lot of different QRP rigs and still have some home brew stuff plus a couple of HW8s, HW9, Elecraft K2, etc..."
From Tony's QRZ.com page, we learn more about his ham radio activities (note his homebrew rigs and his obvious affection for the Drake 2B and 2BQ) First licensed as WN4FOA in April 1954. Other calls held include EL2AD, 7Q7AA, PY1ZBA. Prefer to work CW but I do work some SSB, primarily DX-related. Enjoy chasing DX on all HF bands. Have 9BDXCC and I now have worked and confirmed all of the current DXCC countries . I enjoy QRP operation and currently use an Elecraft K2 (#2213),Ameco AC-1, Kenwood TS-130V SW-40, DC-40, HW-8 (2), Heathkit HW-9 Deluxe (WARC) PSA-9 HFT-9B SP-99 HM-9 HD-420 VLF, MFJ 40T and MFJ 40V VFO, and a homebrew 6AG7/6L6 or a 6C4/5763 etc. I also enjoy operating boatanchor gear which includes a Johnson Viking Adventurer, Viking Challenger, an Eico 720 and an Eico 723 with a HG-10B VFO and a Heath AT-1 and a Drake 2NT. Recently added a neat Lysco 600 transmitter and a Knight Kit T-60, Johnson Viking II, and a Ten Tec 544. Boatanchor receivers include a Hallicrafters SX-100, SX-110, SX-71, Drake R4C and the incredible Drake 2B/2BQ combo. Recently added a Kenwood TS-830S, VFO-240, AT-230 and SP-230.
Yesterday I had my first contact using the ET-2's improved receiver. I had watched the video of N0WVA's receiver and I realized that more sensitivity was possible. So I tried to replicate his LC ratio. I think that helped a lot. Today I posted a plea for help on the SKCC Sked page and then called CQ on 40. I was answered by Pete, KD2OMV who was so loud that I had to take the headphones off my ears! He was booming in, all the way from upstate New York. The receiver was running off a somewhat depleted 9 volt battery. I made a quick video (above). I'm just holding the I-phone up to the headphone, while also trying to copy the incoming CW. This was a really great contact. Pete has a wonderful knack story. He was licensed as a kid but never made a contact. As an adult he found his old box of parts for a 6T9er in his parents house. So he builds it and uses the homebrew rig to make his first ham radio contact. FB Pete. Thanks for the contact OM. I wrote your call on the ET-2.
In response to popular demand, "SolderSmoke -- Global Adventures in Wireless Electronics" is now available as an e-book for Amazon's Kindle.
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For the print version:
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The two versions are identical, except for a minor difference in the paper used. That's why the prices are a bit different.
472kHz WSPR TX
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For the first time in a while, I am back on 472kHz WSPR TX with 10mW ERP
from the earth-electrode "antenna" in the ground. In the first few
transmissions 7...
Antennas, Accessories & Grounds • Re: Large Loop.
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JohnBoy wrote: ↑
Mon Dec 09, 2019 7:19 pm
Does everything look in order ?
You haven't given the dimensions, only a link to a website. You'll have to
copy...
The Sony ICF-7600A continues to impress
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I mentioned in a previous post that SWLing Post contributor, Ed Earps,
recently gifted me his Sony ICF-7600A. I’ve been having a field day with
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THE KY6R “TOP 3” LISTS OF 2019: Ham Radio Rigs
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The Elecraft KX-3 is one of my favorite rigs of all time I “re-purchased” a
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What is a Paraset?
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Bottom Line the Paraset was a clandestine radio set built in England and
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DXing The Utilities (Part 2)
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*The following blog was originally posted in 2015 but might still be of
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40m SSB Tramping Rig
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Please see my YouTube channel for details of the build.
http://www.youtube.com/c/CharlieMorrisZL2CTM
*2N3904 Antenna Amplifier*
Voltage gain is set for 4 ...
8 Band Superhet AM Receiver
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Amplitude Modulation holds a fascination for me. It dates back to those
hours spent as a teenager listening to the big broadcast-like amateur AM
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Heathkit GC-1006 Clock Assembly Log
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Packed in a plain cardboard box inside of a Priority Mail shipping box,
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Checking Step Attenuator with NanoVNA
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I decided to check the step attenuator with the NanoVNA. It would be nice
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Bringing back my Atari 400…
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Brace yourself for old guy reminiscing about the past. Back in 1980, I was
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A Homebrew Stereo for the Shack
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There are times when it's nice to listen to a little music while working at
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thi...
A New Look for your uBitx!
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Adding a "Cool Blue" Display to your uBitx!
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