Receiver troubleshooting

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Did some more troubleshooting on the TCS. All of the tubes are warm, but the audio tube is super hot, like 200 degrees hot... I'm going to have to test the voltages and resistance if the tube pins. However the socket is not accessible from the bottom.
So I'm going to build a tube socket extender and tester. Some are available in ebay, but I dont want to pay $150 for one, so I'll just build it out of my junk box parts.



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