I got my tube extender made. Now I can test the voltages on tubes where
you can't access the bottom of the socket. All of the tube sockets in
the Navy TCS set are inaccessible, so I will use this jig to
troubleshoot it.
Working on the backup TCS receiver. This one is very dirty... I fired it up with all of the tubes from the original TCS, and no dice. Same symptoms, no audio at all. So it is either a problem with the tubes or with the power supply :(
Read some of the manual again and figured out that I had one of the knobs on the wrong position. I did hear a squeal on one frequency, so it's not stone dead. But definitely an issue going on.
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