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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:

Plus 20.61 Volts DC. Or did you want RF volts? I don't have an RF probe. Jim VE1RB [email protected]> wrote:

I dove into my original TR-5 (s/n 1051) to try to figure out why it stopped txing. I decided to start with a full re-aligment as per the manual. While looking through the manual, I discovered the BPF

Hello everyone, I am getting prepared for SKN so I decided to finally put the blue LEDs from Radio Lab Works into the T4XB. Prior to this, the twins worked fine on both SSB and CW. After replacing the

There are a few areas of concern but the main fracture is pretty obvious. "Stan Gammons via groups.io" <buttercup11421@...> wrote: -- 73 -Jim NU0C

It should come off if all the screws are out. Your heatsink goop may have turned into cement. You could probably loosen it up by applying heat to the heat sink with a heat gun or hair dryer. If the

Yes I see it. That one is pretty obvious. The one I found had the cut end of a component lead in the same area that was bent over a little like it was struck by something. From convenient angles it

The big glob under the coil doesn't look good or does the connections through the ceramic under the coil. The solder joint immediately behind the opening in the middle of the ceramic doesn't look good

Steve, did you ever figure out this behavior? My R-4A BFO has identical symptoms to yours. I fixed it by adding a 1K resistor to pull down the Vcc on Q6, but why does the transistor oscillate at 6V

Lead next to the screw bottom left. Looks like a piece is clipped off. -- Richard Knoppow Los Angeles WB6KBL SKCC 19998