Originally Posted by: Dennis LoganI have a Fender 25R amplifier.
More and more often, especially when I first turn it on, I get a buzz.
I can disconnect everything and I sometimes I still have the buzz.
Sometimes if I pick up the amp or rock it back and forth, there will be a loud pop and the buzz stops. Sometimes it comes back. It seem the longer the amp is turned on the better it gets.

What could be causing this buzz?