Bitty
Let it roll
I was wondering if anyone would know what this might be. Out of the blue listening to radio I started to hear a loud hum. I disconnected all components its still there. I swapped out all the front tubes even the ones in the back corner still there ( did not mess with radio ones). I tried different cables still there. I tried my amp with a device on it's own and that works fine on its own. This hum is on every input its constant loudness for the most part. I can turn it all the way down it's gone. But just a smidgen up it's loud and doesn't really get louder kind of does not sure then dips down a little then comes back up. If I try to stay in that dip though it creeps back up. Still that is still to loud there as well. Its kind of a lower hum not super low, but lower. I switched directions of the plug as well. My amp is plugged into it, and thats how I tested the amp with the volume all the way down on the preamp.