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So far only the one that mounts inside the Browning Mark 3 SSB transmitter is listed on fleabay: https://www.ebay.com/itm/116884814172?mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5336136228&customid=&toolid=10001&mkevt=1 The version that fits inside the Siltronix 80 or 90 VFO is set up a...

The plus two was famous for a somewhat "shrill" sound. Yours may be worse than normal, but the boosted treble and reduced bass tones were meant to improve "punch". And a shrill woman's voice in an echoey room could make your ears bleed if she used a plus two. 73

I understand the rules and wish to enter the contest. 73

It's one of the displays you can get with the Troy Radio DDS VFO setup. That one fits nicely behind the channel number window on the front of a Browning Mark 4A transmitter, among others. 73

R215 and R213 are in the 10-Volt regulator circuit. This suggests that Q35 and Q37 are damaged, and maybe D72 and D73 as well. Only way to fix that section is to take both transistors, the diode and zener each loose to test. It won't work until all those parts are functioning properly. 73

Found this listing on fleabay: https://www.ebay.com/itm/355777547157?mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5336136228&customid=&toolid=10001&mkevt=1 The one in the listing's picture has the same IR logo as the pic above. 73

Well, okay. Maybe the title is a little over the top. Even so, parts suppliers I have relied on for years are falling by the wayside month by month, year by year. All Electronics was a reliable source of 'second-source' electronic parts. Prices were a fraction of the regular catalog sources...

The ERF9530 was not designed as a RF power amplifier. Its original purpose was to switch DC power-supply current, typically in a switchmode regulator circuit. But it was adapted to use as a RF power amplifier because that type part is produced in large quantities cheap. The MRF300 is a 300-Watt...

It's not quite as simple as "change a crystal" like some radios. The commercial "EXPO 100" channel-expansion kits for this type radio contained an oscillator circuit along with the quartz crystal. It would "force feed" a mixing frequency into the 29's PLL circuit and cause it to lock onto...

You'll need to replace the two unshielded wires on the supplied input cable with coax of some sort. Really needs to be a shielded lead. The tapoff point is TP1 in the original schematic. This would be the hot side of L20's 2-pin side. Don't connect to the 3-pin side of L20. You'll also need a...

The "Satellite Deluxe" is in Sams CB19. 73

My idiot light just came on. Some newer 'scopes have a frequency counter function built in. And many don't. What's your 'scope's model number? 73

Yeah, I'm just another dinosaur waiting for the asteroid. 73

The routine the 1980s instruction sheet recommended is what we use. C163 gets removed. One lead of C87 is pulled out of the pcb, the end leading to IC2. A 22pf disc goes in the hole left by C87. The free ends of C87 and the new cap get lap-soldered together. The kit's white wire is the output...

Inquiring minds can wait. 73

First job I ever had repairing radios I worked for a guy who knew everything I didn't. Mostly. After a particularly baffling fault got fixed I asked out loud "why did it do that?". The boss said "Sherlock Holmes stuff doesn't pay the bills. Don't worry about it and move on to the next one". In...

Setting a frequency adjustment requires some sort of way to measure or compare the frequncy that you're adjusting when you turn the screw. A frequency counter is some folks' tool of choice. I prefer a receiver that has its frequency calibrated to "eavesdrop" on the frequency being adjusted...

TDA6130 is a new name for an old part, same as the Siemens S042. Siemens got out of the chip business and the new owner of the patent issued a number using their own corporate "TD" prefix and part number. Same chip, new number. 40 Watts from a DX2547? He has it confused with the DX2517 model...

Well, something is completing a circuit with the mirror board removed if you still see voltage at TP7 and/or 8. 73

I use a 33pf on the Pride DX300 relay circuit board we sell. And that was a trial-and-error choice for best result. The factory used a "L" network on the antenna socket, with maybe 4-500 nH between the relay and the antenna socket, and 110pf to ground on the center pin of the antenna socket...