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I believe Econco will function test transmitting tubes. You might check with W8JI, too. Hal Mandel W4HBM

Happy New Years Everyone, Its that time of year when I'm spending more time in the shack and am back looking at the LK-500 ZC.? In response to the many (much appreciated ) suggestions that I could

That's a good suggestion Mike, thanks, I'll look into it.

Maybe locate the power amplifier from a Yaesu FT-736 6 meter module. The 736 parts have gotten cheap.

I'd like to acquire a 10 - 50 watt linear power amp to use with a 50 MHz. beacon transmitter. Input must be in the 10-18dBm range. Kit or assembled or "needs repair" is fine. Suggestions? Thanks,

Looking in the MFJ catalog, it looks like the xmfr ( part @406-1109-2C ) has the following ratings: Secondary: 1047 vac? 0.1Adc 22 vac? 1.5Adc? CT 5.2Vac? 15Adc? CT Primary:? 90 - 140?? 205 -

Snap! Yes, it is a specifically designed transformer and I'm sure Tom will have the correct information on it. 73 from sunny Western Australia where we have made it into 2025. Alek VK6APK.

Contact Tom W8JI, he will know for sure! ?He’s the only guy I would rely on for exact data concerning that transfomer. ?Lou Sent from the all new AOL app for iOS

Would Ameritron forward there suppliers info?

I have a transformer company that might be able to assist.? Does anyone know the exact spec of the Ameritron AL-80B power transformer?? ?I'm assuming secondaries are? 9VAC @ 1.5A,? ?3.53VAC @

Alek, QRO Technology made that same mistake with the fan speed switching on the 2500 amp. ?It eventually ruins the switch. ?In one case I had the warm up timer would reset every time the guy changed

I know that the W6PO amps I built for 2 meters and 220 mhz shorted out the resistor for operating bias. But he was a smart guy. :)? Some paperwork I have from? K9EK does the same thing.

In older commercial grounded grid amplifiers, it is common to see a cahngeover relay used to switch between a zener diode or similar bias regulator and a bias cut off resistor. My question is, why did

Before retiring and while still active in the field, precision D.M.M.'s were important, not in themselves, per se, but as a reference point in any possible report ensuing from having to have employed

GM3SEK? Here is a link that turned up. No longer sold it seems, and a quick search for gerbers turned up nothing for me. The schematic is in the manual so one could do a board run if so inclined. Bob

http://www.ifwtech.co.uk/g3sek/

Attached to this email are the manuals for the G3SEK tetrode and triode boards as well as the tetrode board design documentation. Maybe the moderators can add these to the group files section.

Mike, Try this: https://web.archive.org/web/20180408212726/http://www.ifwtech.co.uk/g3sek/boards/tetrode/tetrode-1.htm 73 Bill N4LG

Hi, Would anyone have the G3SEK schematic and PCB drawings for download? The link seems to be broken for me: http://www.ifwtech.co.uk/g3sek/boards/tetrode/tetrode-1.htm Cheers, Mike Peace VK6ADA

I have ran into a couple of those online. Wanted to put one in my Thunderbolt, as it uses the gas filled tubes to regulate the screen, but I was gonna try a string of Zeners soldered into an old tube