• 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.

Preamp hum again

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
I did a long search on this and will try and redo my ground wires. I do have one question, the hum gets much worse if I move my hand closer to the output wires. Or if I put the metal top on the preamp that gets pretty close to the output wires. Is this a "classic" sign of something. I have never had this happen on any other project. The output wires are twisted but not shielded.

Thanks
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.