Jay's results: http://www.w1vd.com/BAreceivertest.html
Jay's methods: http://www.w1vd.com/Receivermeasurementbasics.html
Discussion: https://www.antiqueradios.com/forums/viewtopic.php?t=96872
Serving the worldwide community of radio-electronic homebrewers. Providing blog support to the SolderSmoke podcast: http://soldersmoke.com
Jay's results: http://www.w1vd.com/BAreceivertest.html
Jay's methods: http://www.w1vd.com/Receivermeasurementbasics.html
Discussion: https://www.antiqueradios.com/forums/viewtopic.php?t=96872
In Part II I'll show you how this thing sounds and what it is like to use it for SWL, CW, SSB and AM.
Oh man, we've all been there: OBSESSION with ham radio. Shep went over the top and didn't sleep all weekend when his homebrew transmitter was finally neutralized and started to put out a decent signal on 40 meter CW.
One of my favorite lines in this episode is about how, before the neutralization, the transmitter had had so many parasitics that it would continue to transmit for two hours AFTER Shep turned it off, "and all on the wrong frequencies."
I found this while searching for other Shep references to Johnny Anderson, the guy who built the TV receiver. Please let me know if you know of any other Shep references to Johnny.
Here is the program. Skip ahead to 20:50
EXCELSIOR!
I heard about this video while trying to track down information on John Stanley Anderson's 1939 television receiver. "Patrolling the Ether" is kind of hard to find. It is not really on YouTube. But there is a good BARC Vimeo video about WWII RDF efforts that includes at the end the full "Patrolling the Ether" video.
Here it is:
Thanks to BARC and to Brian Harrison for putting this together.
In the video, they discuss the invention of the Panadaptor by Dr. Marcel Wallace F3HM during World War II. I set up a very crude Panadaptor using Wallace's principals:
https://soldersmoke.blogspot.com/2019/05/diy-waterfall-quick-and-easy-panadaptor.html
The video above shows one application of the principal, but be sure to check out the IEEE article:
Speaking of 75 meters, Scott sent me this picture of his latest effort: re-building a Heathkit HW-12. FB. This is a way of experiencing (or re-experiencing) the construction of a Heathkit. I did something similar, but much less complicated) with a Heathkit VF-1. Scott did a wonderful job taking this old rig apart. That PC board looks great (see photo below).
Scott's e-mail:
Hi Bill and Grayson, I’m glad to hear of your good results with the 6EA8’s in your MMMrx! I had similar results when I finally got rid of the 6U8’s with their iffy performance and went with the 6EA8’s. I did put a set of 6GH8A’s and tried it out, it worked, but I don’t have any data on performance improvements. After completing the outboard power supply and audio amplifier, I’ve taken a break from my MMMRx and it’s sitting there on the bench. I’ll get back to it in a while.
In the meantime I’ve started a new project where I’m re-kitting a Heathkit HW-12 eighty meter transceiver. I have completed the disassembly process including the pcb. I bought a Hakko vacuum desoldering iron for taking all (ALL) parts off of the pcb, and it’s bare now. I’m planning to start rebuilding this coming week. 73 Scott WA9WFA
Phil W1PJE managed to hear and record some of the 2021 transmission (Thanks Phil). Listen here:
https://drive.google.com/file/
Phil also sent this spectrogram of the signal.
Rarely if ever will we come across a high quality NETFLIX series built around a shortwave broadcast transmitter. But that is what we have in Gloria. It is really good. We were especially interested in it because we lived in Portugal for three years. In addition to all the intrigue and drama you will catch glimpses of broadcast antennas, big transmitting tubes, and one out-of-focus shot of what appears to be a Hallicrafters receiver (SX-42?)
More info here:
Here's the NETFLIX link:
https://www.netflix.com/title/81073977
Thanks to Thomas K4SWL of SWLing Post for the heads up.
I was led to this magnificent receiver by the very humble 6U8 tube. Scott WA9WFA and I have been learning (mostly from Grayson KJ7UM) that the much used and sometimes loved 6U8s (three of them in our "Mates for the Mighty Midget") might be a bit long in the tooth, old even by Thermatron standards. I was worried when I remembered that my Drake 2-B has a 6U8 in it -- V2, the first mixer. So I Googled for more info and was led to this amazing receiver, a 2018 creation by KG7TR. How did we NOT see this for almost four years?
Here is more info and pictures:
http://www.kg7tr.com/75s-2b-receiver.html
Here is Mike's write-up of the project:
Mike KG7TR's web site:
As for the 6U8s, well Grayson says the tube has been getting something of a bum rap. And KG7TR has two of them in this receiver, so I will obviously have to give the 6U8 another chance.
--------------------
I didn't know that Lew McCoy had his own crystal and crystal filter company:
This is Scott WA9WFA's first homebrew construction project. He did an amazing job on a very complex project: a 13 tube superhet receiver. It features plug-in coils for multi-band coverage, dual conversion with IFs at 1600 kHz and 100 kHz, and several regenerative stages. Scott's construction is top notch. He tells us that he had been working on this receiver for several years, so long in fact that some of his friends began to wonder if it really existed. Well wonder no more. Retirement has provided Scott with the time to finish this project.
SolderSmoke Podcast #233 is available.
http://soldersmoke.com/soldersmoke233.mp3
Travelogue: Cape Cod. SST. Marconi Site.
The WFSRA: The World Friendship Society of Radio Amateurs.
Pete's Bench:
The Pimp.
The NCX rig.
The Collins.
The many DC receivers built worldwide.
The parts shortages are real! Several key radios on hold. Si5351 sub.
Talk to G-QRP convention
Bill's Bench:
FT-8. Not for me. I tried it.
Novice Station Rebuild.
Globe V-10 VFO Deluxe.
Selenium rectifier removal CONTROVERSY?
Not crazy about my Novice station. Not crazy about CW.
Mate for the Mighty Midget. Again.
Mike W6MAB -- Detector problems LTSPICE Check
One more mod for MMM RX. Ceramic filter at 455.
Dropped screw inside tubular cap on Millen 61455 transformer.
Talk to the Vienna Wireless Society
Thinking of a Moxon or a Hex beam.
BOOK REVIEW Chuck Penson WA7ZZE New Heathkit Book. http://wa7zze.com
Mailbag
-- New SPRAT is out! Hooray!
-- Todd K7TFC sent me copy of Shopcraft as Soulcraft. FB.
-- Dean KK4DAS building an EI9GQ 16 W amp. FB.
-- Jack NG2E Getting close on Pete's DC receiver.
-- JF1OZL's website is BACK!
-- Tony K3DY sent link to cool books.
-- Sheldon VK2XZS thinking of building a phasing receiver.
-- Peter VK2EMU has joined the WFSRA. FB!
-- Ned KH7JJ from Honolulu spotted the Sideband Myth in the AWA video.
-- Chris M0LGX looking at the ET-2, asks about the variometer.
-- Pete Eaton Nov 64 anti HB rant in november 1964 QST. Wow.
-- Josh Lambert Hurley spreading FMLA stickers in the UK. FB
-- Stephen VE6STA getting ready to melt solder.
-- Got a great picture of Rogier PA1ZZ back on Bonaire.
-- Farhan reading the manual of Hans's new digital rig.
-- Paul G0OER wonders if FMLA getting ready to move on 5 meters.