Re: Buzz

D.M. Procida wrote:
I get a buzz, which seems to be something to do with the light dimmer
switch, through my Fender Champ amplifier.

I can make it go away by touching the strings or the metal parts of the
amp. There's a circuit between those and the earth pin on the plug.

How can my body soak up a hum that the earth can't?

Daniele

There are two main sources for hum. The amplifier itself produces some and some is radiated by other appliances (mostly via the guitar).

When you earth the metal parts of the guitar by touching them, you are directing the radiated hum (that the guitar is receiving) to ground before it has a chance to enter the amp's circuitry - and prevention is better than cure.
.

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