“I have a busted Drake DX-4 and TX-4 “
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Never heard of a DX-4
Do you mean R4 and TX-4 separate RX and TX units?
The transceivers were TR-3 and TR-4. They had external power supply.
Transmitter is TR-4B. External power supply with a speaker in the matching box. Box plug/pin connector to the transmitter, 120 mains to the receiver.
It's been a while since I looked at them.
I just looked at them to confirm with a flashlight... and cried a little inside that they are dead.
I even have a box full of spare tubes for them.
/johnny
/johnny