Hum Reduction

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Dave the bass
Amstrad Tower of Power
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Joined: Tue May 22, 2007 4:36 pm
Location: NW Kent, Darn Sarf innit.

Re: Hum Reduction

Post by Dave the bass » Sat Apr 01, 2017 9:24 pm

Wild shot from the back of the class MrC....Have you meaured with a DVM that the earth pin on the mains cable to the amp to a screen on the input Phono socket is 10R and that the metal casework is very low R to the same earth pin?

Then do the same with the Pi connected to the amp whilst the Pi is powered by its PSU.
Dirt eating, low-voltage boy but "'Occasionally phenomenal'"

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