• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tube preamp problem

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@mot

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Joined 2004
pedroskova said:


Then it's probably coming from within. Any solid state critters lurking in your chassis? Maybe some chip or ss rectifier is spewing RFI.

Also, have you tried shielded signal wire? Sorry if this has been hashed over somewhere else in the thread.
Click to expand...

Well, you have just solved my problem. There is also some electronics for relay control,delay, and display. I disconected display power suply and poof.... All problems gone in just one move. All of those electronics is my design so probably I look over something.
Thanks!!!
 
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