Serving the worldwide community of radio-electronic homebrewers. Providing blog support to the SolderSmoke podcast: http://soldersmoke.com
Podcasting since 2005! Listen to Latest SolderSmoke
Tuesday, April 7, 2026
Are There Really Photons on the Signals from, say, a 20 meter Dipole?
Saturday, March 21, 2026
Space Hints from the Dominican Republic in 1994
Check out the article in the link below. I too got a QSL from RS-10!
https://www.gadgeteer.us/SPAHINT.HTM
The 2 meter portion of the Ray-Gun appears below. I still have the elements.
Monday, February 23, 2026
SolderSmoke Podcast 263: DR-PR, UM, DCRX, SKN, Design, PSSST, W7ZOI, FT-101, HW32A, VK, HST, AMP, MAILBAG
February 23, 2026
SolderSmoke Podcast #263 is available for download:
Audio: http://soldersmoke.com/soldersmoke263.mp3
Video: https://www.youtube.com/watch?v=Fn164glxQ6s
Opening
May 26, 2014, coming up on 12 years! That was the 1st podcast where Pete N6QW was interviewed by Bill in Podcast #161, which means 102 podcasts ago. 12 Years of Julian-ismo. Thanks Pete!
What to build? Question faced by VWS Makers Group and by Charlie of RedSummit RF. Regen? Test Gear? Simple oscillator?
But did you DESIGN it yourself? What does that even really mean? Barrie Gilbert in Jim Williams' book: https://soldersmoke.blogspot.com/2025/12/homebrew-you-say-but-did-you-design-it.html
Grayson KJ7UM on a podcast -- Make it your own way. Copper Clad and Glue! Manhattan style! "BUILD SOMETHING!: Tube testers not necessary. OK to call thermatrons "vacuum tubes." No ruling on calling them "valves" yet.
Pete:
-- When hams were hams -- Turning a Heath monobander into a tribander
-- Simple SSB
-- W7ZOI rigs
-- The Yaesu FT-101
SHAMELESS COMMERCE DIVISION: Mostly DIY RF! Patreon! But no more Amazon. We do not want to help Bezos make more money. Even if this will cost us. So please, consider a donation or a Patreon sponsorship instead. But no more Amazon through SolderSmoke.
Bill:
-- Dominican Republic to Puerto Rico on 2 meters -- status report.
-- Working Australia on 20 meter SSB in the morning.
-- The SpiderWeb net.
-- The Hubble Space Telescope -- an old friend
-- One contact on Straight Key Night (Dean reminded me). I worked NB1U on 20 meters with QCX from KD4EBM.
Dean:
-- The University of Michigan ant the Direct Conversion receiver project.
-- Boxing up the amplifier. A tale of woe. Identifying oscillations. A QSO with the Dominican Republic: https://soldersmoke.blogspot.com/2026/02/a-qso-with-dean-kk4das-northern.html
Ian VK3MO Huge antennas, big signal, friendship with WA3O https://soldersmoke.blogspot.com/2025/11/vk3mo-and-wa3o-brotherhood-of-ham-radio.html
Bob KD4EBM 2 meter propagation info
Todd K7TFC -- Mostly DIY RF
Mike K6STR Worked Pete on 40, building for CW and SSB on 2 meters
Grayson KJ7UM German Avionics, MMM Origin. Old Steampunk Homebrew rig: https://soldersmoke.blogspot.com/2025/12/a-very-interesting-old-steam-punk.html
Phil W1PJE Forrest Mims III Mims's sad denial on climate change.
Ciprian YO2DXE Heard the SAQ Alternator see: https://soldersmoke.blogspot.com/2025/12/alexanderson-alternator-on-172-khz.html
Tom NS6T: Very useful azimuth map with grey lines: https://ns6t.net/AzShadowMap/
Walter KA4KXX -- 20 meter Direct Conversion Receiver. FB Walter!
WN2A Mike Dos Equis man is BACK! https://soldersmoke.blogspot.com/2026/01/hes-back-dos-equis-man-most-interesting.html
KB4HG Rhett: On USB on the Old Military Radio Net with a PRC-74. Want one!
Thursday, January 29, 2026
Attempting 2 meter contact, Dominican Republic to Puerto Rico
It is about 100 miles across the Mona Channel. That is a longshot on 2 meters, but I got the idea when, this past summer, I regularly heard WIDI 99.5 FM in the Dominican Republic from western Puerto Rico. So over the fall I gathered 2 meter gear, and got a directional antenna and sent all of this gear to the DR.
Here is the antenna. Seven elements. I got it through Amazon. It came kind of incomplete and without any written or on-line instructions. AI told me to do exactly the WRONG thing with what they assumed was a reflector. Fortunately I ran into this YouTube video and learned that it was in fact a "ZL Special" antenna, and that it has, in fact, TWO driven elements. It was through that video that I learned how to assemble this thing.
My "station" consists of a Heathkit HM-2109. It is a VHF wattmeter/SWR meter that I bought by mistake. But I kept it, and it proved very useful in this 2 meter Mona Channel project. There is a Baofeng UV-5R (boo! hiss!) and a Yaesu FT-470 that KD4EBM gave me. I have a Communication Concepts 2 meter amplifier -- I must have picked this up at a hamfest. It promises 35 watts with 5 watts of drive. The old CCI amp gives the rig good juju.
This morning I wrote to the hams of western Puerto Rico:
--------------------------------------------------------
Saludos desde el otro lado del canal de la Mona!
-----------------------------------------
Greetings from the other side of the Mona channel!
I am a radio amateur: Hi7/N2CQR. We live in the Dominican Republic in Cap Cana six months every year.
I've noticed that I can listen to WIDI 99.5 FM here.
There seems to be Tropospheric ducting.
Two FM transceivers
An amplifier at 35 watts. \
A 7-element directional antenna with a gain of 11.5 db.
I am at an elevation of 7 Stories. I can see the Mona's
channel.
-------------------------------
Stay tuned!
Wednesday, November 5, 2025
VK3MO and WA3O - The Brotherhood of Ham Radio
Thursday, October 9, 2025
Why I can listen to both sides of VK-G Long Path QSOs in the Dominican Republic
Bottom line: I think when Australians talk to Brits via long path, in the Dominican Republic I am between the two. Both have their beam antennas aimed (generally) un my directions. With an omnidirectional antenna (my 1/4 wave vertical) I can hear them both. While they are on the Long Path to each other, I am Short Path to both of them.
Here is my log entry (From the Dominican Republic):
August 20, 2025
20S around 0830 UTC VK5UK Rich and G2YT Peter. Rich was in LP contact with Peter My VFO was moving as the air conditioner kicked in. I think I was hearing both of them SP. With VK5UK I was off the side of his beam. Same with Peter G2YT.
----------------------------
Peter G2YT wrote:
Yes, Rich and I were working Long Path… I was beaming at the top end of South America (about 240 degrees) and Rich was beaming approx 120 degrees.
------------------------------
Rich, VK5UK wrote:
Hi, thanks for the email... My beam heading was around 150 degrees from VK long path to Europe you would have been receiving me via the shortest path between us, and I suspect you were being received by Peter on the same path? 73 Rich
------------------------------
Here is a good website that describes (using Australia to Europe) the Long Path and Short Path propagation paths:
https://www.pa9x.com/long-path-or-short-path-propagation/
Here is a link to Google's new AI (on this subject)
Monday, August 25, 2025
The World's Largest Radio Telescope -- It is in the Netherlands
Wednesday, August 6, 2025
Antenna Options and Views from the Terrace of SolderSmoke Shack South
Thursday, June 19, 2025
More on Agent Sonya
I had completely forgotten that my blog had at least two posts on Agent Sonya way back in 2009. I know there is a lot of interest in her alleged radio derring-do.
Here are the two blog posts from 2009:
https://soldersmoke.blogspot.com/2009/08/sonya-had-knack.html
https://soldersmoke.blogspot.com/2009/09/sonyas-rig.html
And here is my 2025 post on Sonya:
https://soldersmoke.blogspot.com/2025/04/agent-sonya-did-soviet-spies-really.html
One friend recently mentioned that we have not seen any museum evidence of these kinds of homebrew spy rigs. If this really was a widespread practice, you would expect to find at least ONE of these rigs in a museum somewhere. Has anyone seen this kind of thing?
Here is something more recent about Sonya from the National WWII Museum in New Orleans:
https://www.youtube.com/watch?v=NU9-APiIUaQ
The Macintyre interview is really interesting. A friend told me that he is a very serious writer on the topic of espionage, whose assertions have to be taken seriously. For our purproses, here are some highllights:
22:18 Sonya goes through Soviet Spy School and is trained on how to build radios.
24:50 In China under Japanese occupation, had bamboo poles supporting antenna over her house!
25:40 Transferred to Switzerland, "built another radio."
34:18 Transferred to UK, built a "powerful radio transmitter in her loo."
51:41 Macintyre refers to Sonya as "the only Soviet radio operator in Switzerland."
So, I still don't know about the claim that Sonya was homebrewing radios. It does appear that Sonya was building them. But it also seems like she was more of a radio operator than she was a spy... Perhaps the Soviets didn't see the same distinction that we do. Still, it would be nice to find in a museum somewhere at least one example of Sonya-style homebrew radio.
Macintyre says that "all biography is burglary." What would autobiography be?
Sunday, June 8, 2025
Phil W1PJE, Director of MIT's Haystack Observatory, visits SolderSmoke East, Talks Radio with N2CQR and KK4DAS
Saturday, May 17, 2025
MIT's Haystack Observatory and Dr. Herb Weiss
He spent the bulk of his career developing radar when there was none in the United States. He joined the Radiation Lab at MIT, which was just being established to support the war effort during World War II, designing radars for ships and aircraft. In 1942, when England was in the throes of its air war with the Nazis, Herb went to England and installed radar in planes with a novel navigation system that he and a team had designed for the Royal Air Force. He later spent three years at the Los Alamos, New Mexico, laboratory improving instruments for the A-bomb. After seeing the need for a continental defense network against the Soviet missile threat, he returned to MIT to build it. If not for Herb, there also likely would be no MIT Haystack Observatory, a pioneering radio science and research facility."
Okay. I was born in New Jersey, and my first acquaintance with electronics was about the age of 12 or 13. We had a battery-operated radio, which didn't work, and I asked around about what do we do about it. They referred me to a man two blocks away, who was a radio ham it turned out. So I carried this monster with the big horn and, I guess, the dog sitting on the speaker to his house. We went down in the basement, and I was just fascinated. I was hooked right then and there. A year later I became a radio ham at the age of 13, 14 and literally have been in the field ever since, until I retired. I was fortunate enough to go to MIT as an undergraduate, and most of the people I ran into of that vintage didn't really have a hands-on feeling for electronics. By the time I got to MIT, I had built all kinds of things, including a TV set. Then it turned out that NBC was just trying to get their TV set on the air in New York on top of the Empire State Building."
Phil Erickson
Monday, May 5, 2025
I admit it. I am not 100% homebrew. I hang my head in shame.
Walter KA4KXX and Mike WN2A and I were recently talking about the degree to which we are 100% homebrew. Both these guys come a lot closer to this goal than I do. Here is my assessment of my gear:
I fall far from a state of 100% homebrew grace:
Tuesday, February 4, 2025
Mr. Carlson Restores a BC-348 -- But 40 Meters Sounds Very Weak. Why?
Friday, January 31, 2025
Radio Antenna Fundamentals Part 1 -- 1947 USAF Film
Sunday, December 22, 2024
SolderSmoke Shack South -- with Mythbuster II and AN762 .1 kW Linear
Saturday, December 21, 2024
KE5HPY's Altoids Direct-Conversion Receiver for 40 Meters
It is a thing of beauty. You can see all four stages in there. There is the Bandpass Filter in the upper left. Below that is the VFO. In the center you can see the SBL-1 mixer. Off to the right is the audio amplifier. FB Chuck!
Chuck KE5HPY writes:
Allow me to add an endorsement of the joy and practicality of the DC receiver. Whether XTO, VFO or DDS, ring diode mixer, or Polykov, the DC IF concept is a real winner. They really deliver wonderful audio and clarity that is very satisfying for homebrew builder.
Wednesday, November 13, 2024
SolderSmoke #254 (Audio and Video Versions): Australian Hex Beam Eaters, Fake Wires, Hybrid Rig, Antennas, Mythbuster II Transceiver, Mailbag
November 13, 2024
SolderSmoke Podcast #254 is available:
Audio Version here: http://soldersmoke.com/soldersmoke254.mp3
Video Version here: https://www.youtube.com/watch?v=ZiZwWY1CQgI
Opening: Disturbing news from Australia! VK5RS reports that his Hex beam was EATEN by Cockatoos! So stop whining about your HOA problems, OK? It could be much worse!
FAKE WIRES FROM CHINA! Oh no! Even the wires? There is a good video from Mattias. I have it on the SolderSmoke blog. https://soldersmoke.blogspot.com/2024/11/clip-leads-made-with-fake-wire-buy-good.html Important to note that Parts Candy doen't have this problem. Buy your test clip leads from our sponsor, Parts Candy. Link in the column on the right or go to partscandy (that's one word).com
Bill's appearance on the Ham Radio Workbench. (Bill made some overly harsh comments about radio rejuvenation, and was trying to make amends.) But now we throw down the gauntlet. WE CHALLENGE the HRWB guys to build -- to homebrew - our TJ DC RX. They will experience JOO, JVO and the elite status that comes with having built their own ham radio receiver. And if they go on to build a 10 minute transmitter, they can use it for CW contacts. Like on POTA (Thomas!)
Anniversary approaching: In August 2025 we will mark 20 years of the SolderSmoke podcast. And we have already passed TEN YEARS OF JULIANISMO! Pete joined the podcast on May 26, 2013. Thanks Pete!
Question for the group: Which SSB transceivers did Doug DeMaw build?
Pete's Bench: Thermatron-Transistor Hybrid Goodness. https://n6qw.blogspot.com/2024/10/blog-post_20.html
Dean's Bench: The new Hex Beam (watch out for Cockatoos!) Now that Dean and I both have Hex Beams, we plan on pointing them at Southern California in an effort to talk to an elusive RADIO GENIUS. Stay tuned!
SHAMELESS COMMERCE: Please link to our blog and podcast! Please become a Patreon supporter (I have been posting special content there). Be sure to make use of the great boards, parts and kits available at Mostly DIY RF. Still use the Amazon link on the SolderSmoke blog page.
Bill's Bench: The new Mythbuster II (20 meters only). Built in about 3 weeks. On-the-air, while still on the bench! Worked Euope and South Africa QRP. https://www.youtube.com/watch?v=6o9QerQ7jzg
Getting another CCI amp for the Dominican Republic.
MAILBAG:
-- Paul VK3HN, talks about the nice sound of the Mythbuster II's receiver, and a new QRP rig from Dave Benson K1SWL.
-- Rick N3FJZ sent some very kind words in support of the SolderSmoke podcast. Thanks Rick.
-- Chris KD4PBJ sent us a very nice message. Thanks Chris.
-- Kevin from Belgium sent a nice blog post in support of SolderSmoke.
-- John WB4BTL spotted his old call (from 1974) in my Novice Log.
-- Dave KD2E spotted his Novice call in my Novice log: WN2TBB. He also saw a good friend WN2EHE.
-- Mehmet who has the awesome and useful WEBSDR of NA5B helped me with a Facebook problem. Thanks Mehmet!
-- Mike WN2A asked about the Yaesu FT-101 9 MHz VFOs.
-- Phil W1PJE (from MIT!) writes about old broadcast radio shows. And some really nice words of encouragement.
-- Grayson KJ7UM sent kind words of encouragement, and great background on hybrid rigs.
-- Peter VK3TPM writes about the decline of blogging, but notes that blogs are useful repositories.
-- Todd K7TFC sent me some additional Mostly DIY RF boards. Thanks Todd!
-- Ed DD5LP/G8GLM Kind words on SolderSmoke, nice info on the G-QRP 50th edition.
-- Bill AH6FC Encouraging words and good info on solar. Mahalo Bill!
-- Michael AG5VG Building LC VFOs for 7 MHz. FB OM!
-- Bob K7ZB An EE who likes the treatment of mixers in the SolderSmoke book.
Tuesday, October 15, 2024
Two Great (but Old) Videos about Waves












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