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Welp, I guess I need to put my receiver back on the bench and take a butcher's... Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent with [Proton

I'll have to go and look. I can remember that it was built in 1967 because it has the QC tag with it. Since I reported it to Ron, the s/n is between 6136 and 6968. Mint condition. I bought it from a

Excellent. Yes, I know that removing covers -- especially on the transmitters and transceivers can bump tubes and that can cause them to be intermittent or not work at all. The transmitters and

Thanks, Gary, for the explanation. I replaced my 1K pull-down resistor with a 0.1uf and it seems to work fine. Obviously that point of the oscillator wants to be at RF ground. I feel much better about

Are you saying that the parasitic choke got hot enough to melt solder? Safe bet the tube(s) are bad. Gary W0DVN

That is WAY too high!! The maximum that should be seen at this point is ~15 volts, the high end of 10 meters. 20 volts here would push the VCO to its maximum frequency, if it is running at all. Is

On 2024-12-29 20:37, Jim Shorney via groups.io wrote: The component leads are flat soldered to > the top side. You do need to take care though that you do not rip the > top side traces off. > Space

Thanks Jim! I now have switched +5V from U2301 after replacement. Still no keyed output. The hunt continues. -- Craig/W8CS Greenville, SC

Drake had an error for a short while (like one month) and fixed the schematic with a missing capacitor. From message #65666 "C188 seems to be added to the same BFO circuit in the R-4B. It decouples

Sorry Tom, I hijacked the thread! Of course, my problem did affect all bands. Couldn't resist when I read about a solder joint problem. 73, Dieter DL5RDO Am 30.12.2024 um 14:46 schrieb Tom Smith: Why

Well done, Jim! :-) Am 30.12.2024 um 05:50 schrieb Jim Shorney via groups.io: There are a few areas of concern but the main fracture is pretty obvious.

"The solder joint immediately behind the opening in the middle of the ceramic doesn't look good either..." You got it, Stan! That was the one! No clue how such things happen but it was pretty obvious

Steve, Did the reset thing. The radio is working normally (I forgot that Tune mode is different than CW mode and I adjusted the gain to get the output in CW). I need to get some new DeOxit as the one

A while back, I too, had the same problem with the BFO not working. I checked each and every part in the circuit and couldn’t find a thing wrong with it. My fix? I added a small value electrolytic

Many tnx reply, Steve. Mine is an 11-tube with S/N 6717B. How does it compare in age to yours? It works fine with the pull-down resistor now, before I had to wait many minutes, sometimes forever for

As the problem emerged after removing the covers, a cursory search for things that may have moved initially makes sense. Don’t toss that 12AX7 quite yet (the audiophools have made them far too

Doing some more research on this message list, I replaced V9 with a different 12AX7 and the sidetone and CW works normally now. However, still getting no change on the gain control when trying to

Why would this only affect 40m? It would seem to me that a PTO problem would affect all bands. Thanks and happy new year to all!

I never did figure out why. The receiver (11-tube and late s/n) is still working fine.

Gary I just checked that voltage again with the band switch on 10 meters and the DC voltage at that RFC505 is 20.52 DC. Hope that helps. Jim VE1RB [email protected]> wrote: