Dear Dean KK4DAS:
Serving the worldwide community of radio-electronic homebrewers. Providing blog support to the SolderSmoke podcast: http://soldersmoke.com
Dear Dean KK4DAS:
The delay was caused by my being at SolderSmoke Shack South and not having an Audacity audio editor in my ancient Chrome book. Thanks to Dean KK4DAS for doing the editing, and for stripping the audio from the YouTube video. I am getting a better computer so things should be back to normal soon.
Here is the link to the audio podcast:
http://soldersmoke.com/soldersmoke252.mp3
Hello Bill and Pete,
-- This is the first podcast from SolderSmoke Shack South: Eastern tip of Island of Hispaniola. Cap Cana, DR, 70 feet up, 1 mile from Mona Channel. Seventh floor shack with view of the ocean. Antennas: Dipoles for now, maybe Moxons or Hex later. STARLINK
- The San Francisco case against me. One guy thinks we DESERVE prosecution! Get off of my lawn!
But one fellow wrote letter to the mayor asking for leniency. Proposes "Bill Meara Day in SF." FB! I fell victim myself this year: Mike WU2D got me with WA1HLR on SSB video. https://www.youtube.com/watch?v=NLvCNJ_OnEc
-- Dean: Fighting a spur in the sBITX. Filters?
-- Dean: Exploring Class A, Class AB and the RD06HHF1
-- Dean: Extensive work on getting flat gain from FETs up through 10 meters.
-hh- Dean and Bill: OIP3 measurement and setting the bias on an RD06HHF1
-- Pete: Discovers for all of us "RF Man" In spite of all the CB stuff, he is the THE MAN! On YouTube:https://www.youtube.com/@rfmanchannel6915
-- Pete fixes Dean's relay chattering problem: SUBTHRESHOLD CONDUCTION! Yikes!
-- Pete's refurb and rejuvenation of the Drake Twins,
-- MXM news. New docs, and ads from WD5L. All on the blog. 7030 crystals. Why MXM? Chuck Adam's mods, Joh DL6ID's questions about VFO. Yes! VFO from RX. Was Bruce Williams an early Swan Designer?
-- Weird paradox with 25 MHz filter: Low profile xtals have higher Q, but produce more rounded passbands. Why? I note that Minima's 20 MHz filter also had curved passband.
-- Allison's wisdom on filters at higher frequencies. The importance of physical layout. Diodes in the dark! It is indeed more difficult up there. But don't let the perfct be the enemy of the good!
-- Is Bill the only one to ever build a 10-15 Dual Bander using a 25 MHz crystal filter. Why? Farhan's Minima has a 20 MHz 6 pole QER crystal filter. And it too had a rounded passband. But it tooc WORKED.
-- Did my receiver sound tinny due to rising frequency response of uBITX Rev 4 amp? Yes! So I put in a TJ DC RX Af amp.
-- Bill BLOWS UP a Tiny SA Ultra. Ooops. But quickly got a new one from R&L Electronics. Very, very useful. I knew 25 MHz IF rigs were inferior, but by how much? How much was the carrier suppressed? Which filters worked better? What was the opposite sideband rejection. TinySA permitted measurement and comparison.
-- Bill quit 15 meter SSB (for a moment) and went to the 1.22 nanometer band with a Wilson Clound Chamber. Videos on the blog.
SHAMELESS COMMERCE: Thanks to new Patreon sponsors. I am sending some additional video content to the sponsors.
MAILBAGg
-- Thanks to Bob Crane W8SX for FDIM interviews. I will get them out!
--Wes -- W7ZOI has a new TIA amp with variable gain on his web site: https://w7zoi.net/
-- Geoff N6GWB's Rad Receiver https://soldersmoke.blogspot.com/2024/04/the-rad-receiver-from-n6gwb.html
-- Dave K1KA sent Ensemble RTX SDR parts. Thanks Dave.
-- Chuck Adams AA7FO provided good background on my MXM rig, including the meaning of MXM (1990) . Again, great to hear from Chuck, a true homebrew hero.
-- Gerardo HI8P collecting info on the other HI8P, my friend Pericles (SK)
-- Alvin N5VZH picked up a Silktronix CB VFO. What to do?
-- Jorgen SM4WWG listening from Sweden, and making PCBs. FB!
-- Mike WN2A Wondered about opposite sideband rejection of MXM. Not great.
-- George WB5OYP loaned me a book from Elmer Bucher. THE Elmer? https://k9zw.wordpress.com/2020/01/24/on-the-origins-of-elmer-a-reasonable-theory/
-- Wes W7ZOI, Farhan VU2ESE -- Thanks for help on filter issue. Thanks too to Alan W2AEW and G3UUR
-- Josh G3MOT -- Nice message of support in our "struggle" with SF authorities. Going portable to Vancouver island in August. VE7/G3MOT
-- Paul VK3HN -- Antipodean solidarity. Thanks Paul.
-- Rogier PA1ZZ -- great input and help. Thanks
-- Tony G4WIF reminded me of G3ROO's parasets. See Blog
-- Pavel CO7WT His experiences (building, freezing, heating) the VFO in the Jaguey DSB rig.
-- Grayson KJ7UM Sent latest ER with his Collins 51S-1 story. Thanks Grayson.
-- Allison KB1GMX Commiserating on higher freq crystal filters. Thanks Allison
-- Wes W4JYK Notes that Dewey, Cheatam and Howe are based in SF. Can they help with sticky sticker problem?
Mike WU2D put out this nice video (above) about whether or not he should part out his Heath SG-6 signal generator, using the parts in a Paraset construction project. I faced a similar question years ago:
https://soldersmoke.blogspot.com/search?q=SG-6
I just solid stated the SG-6. I was influenced by Farhan and the drinking straws that he picked up with his kids at a McDonalds in Hyderabad.
As with the QF-1, I say to Mike: GO FOR IT OM! You need those parts for other projects. Don't feel bad about the SG-6. But keep that switched coil assembly -- it is quite useful.
At one point they are laughing at old magic eye tubes! They wonder if there is a digital way of recreating this tube in digital form. Sorry fellows, that has already been done:
https://hackaday.com/2023/04/12/the-eyes-have-it-with-this-solid-state-magic-eye/
Even an analog guy like me spotted that one.
Here is the show:
https://workbench.libsyn.com/hrwb-213-radio-rejuvenation-with-dan-quigley-n7hq
But hey, like I always say: To each his own. I'm sure many people like this approach. It is just not for me.
https://www.qsotoday.com/podcasts/KI4POV
Will has appeared on this blog and podcast before:
https://soldersmoke.blogspot.com/search?q=KI4POV
There were a lot points in Eric's interview with Will that resonated with me:
-- Will told about how his very understanding and perceptive wife KNOWS when a homebrew project is not going well. Yea, we have the same situation here!
-- Will mentions the wisdom of Wes Hayward, Doug Demaw, and Pete Juliano.
-- Eric mentioned that there is a bit of his own blood in most of his homebrew projects. One slip of he screwdriver is often enough. My projects also often have a bit of my A+ in them. This adds soul to the new machine.
-- Will spoke of S-38s and HW-8s. I have both these devices here with me in the Dominican Republic. I have used both of them here.
-- Will mentioned the magic that comes when you listen with a receiver you built yourself. Yes.
-- NanoVNA. Yes, very useful.
Lots more great stuff in this interview. Thanks Eric and thanks Will.
The new shack is coming together in HI7 land. I will need a shelf for the test gear -- I am looking for something thatcan sit on the main workbench -- the wall behind the bench is drywall and won't support any weight. I will have to get some plywood to protect the nice woodwork. I have melted some solder already -- I had to fix the little magnifying lamp -- it felt good to get back in the game.
The AM radio station that was providing background music was from just across the Mona passage -- they were in Cabo Rojo, Puerto Rico. My S38-E shows the frequency as being a bit above 700 kHz, but as with most things S38-E, this readout is suspect. Can anyone tell me the call sign of this station?
I have been using the homebrew 15-10 rig, but only in receive mode so far.
I am also doing some VHF scanning, using a Realistic Pro-36 scanner that Bob KD4EBM gave me. So far I am picking up aircraft approaching Santo Domingo from the East. I have the maritime calling freq also programmed in and hope to hear some ships at sea. Thanks Bob.
Dino asked about astronomy. As you can see in the video, the Orion telescope is ready to go, but we are in rainy season here, so the skies aren't too great right now. They will be better in the winter.
Hurricane Beryl is approaching, but current projections are for it to pass to our south on Tuesday. The eye of the storm is not expected to hit this island.
I know there are some readers who dislike Starlink, but I think the technology is interesting. This morning I saw an article about how the Starlink constellation survived the May 2024 G5 solar storm. Note the references to "collision avoidance" and "ion thrusters." Give the devil is due! This is all pretty cool.
https://www.pcmag.com/news/spacex-heres-how-starlink-satellites-weathered-mays-major-solar-storm
Farhan and his son Rayyan with an sBITX
The SolderSmoke crew thought it had a tough time this Field Day: Pete N6QW had hoped to do something, but was stymied by hot California weather. Dean KK4DAS had even worse weather. Bill HI7/N2CQR was at a remote QTH with an HW-8 and a wire antenna -- he managed just ONE contact (W7RN in Nevada on 15 CW). But none of us had as much trouble as our friend Farhan had. In his account of Field Day in Hyderabad, we see an intrepid ham standing up against the slings and arrows of outrageous fortune that Field Day often throws at true radio amateurs. Here is Farhan's Field Day story:
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You asked for it, so here it goes...
Our friend Lex astutely focused on the date of the release of our report about legal prosecution by the City of San Francisco. The truth is that we made almost all of this up. We did put a sticker on a lamp post at Haight and Ashbury. Dave AA7EE did visit the site and report that the sticker had been removed. But all the rest was made up. We did catch several people in this annual April 1 joke. Unfortunately, not everyone who was taken in was outraged by the city's supposed action. In fact, we got one e-mail SUPPORTING the prosecution. This fellow said, essentially, that we were getting what we deserved, that we should take this as a life lesson, and stop with the sticker-vandalism. He was serious. Jeez. APRIL FOOL! We will talk more about this in the next podcast.
I know the podcast has been delayed by a lot, but I am still getting things set up here in HI7 land. I hope we will soon be podcasting with particpation from California (N6QW), Northern Virginia (KK4DAS), and the Dominican Republic (HI7/N2CQR).
Happily, my Dominican ham radio license came through -- I will be HI7/N2CQR for the next year. At some point I hope to take the Dominican exam and get a real Dominican call.
Lex has been our main point of contact in Europe on sticker distribution (aka VANDALISM!). Lex writes:
Hello all,
Walter KA4KXX spotted an error in the schematic of my 2014 "Off the Shelf" regen receiver: The source resistor on the MPF-102 should be 2200 ohms, not 2.7 ohms. See:
https://soldersmoke.blogspot.com/2014/09/schematic-for-off-shelf-regen.htmlhttps://gaodawei.wordpress.com/2024/05/22/2024-ham-radio-in-china-soon-chinese-hams-in-space/
Thanks David!
Version II of the 15-10 rig is mostly done. I did a lot of work on the AF amp, balanced modulator, Mic amp, carrier oscillator, and filter. Dean KK4DAS and I continue to test and measure the RF power amplifier. I describe the brutally simple, non-sequenced T/R switching arrangement, and the spread-out open air construction style.
Version I of this rig is on its way to the Dominican Republic. Version II will stay in Virginia. I have already worked a lot of SSB DX with this rig, including, Thailand, Taiwan, China, India, Kenya, Australia, American Samoa, and others.Thanks Charlie! Be sure to check out the rest of his YouTube channel: https://www.youtube.com/@CharlieMorrisZL2CTM