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Do It Yourself (DIY) paradise for tube and SET project builders.

If you are leaking DC on any of the couplers,that can cause hum.

It can even be 1 volt and cause hum.Take the EL34s out and measure to see if you have an positive B+ at pin 5 of each tube.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken


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