Just to note about amps input impedance and the guitars output impedance. Your guitar's output impedance might be somewhere between... lets say... 9-17k ohms. In the manual of the amp that you have built it states the input impedance is 150k ohms. So, even a Fender G15 has a 1M ohms as its input impedance. So your amp is low comparably to many amps and not higher impedance. (Note: I hope that can help us get away from that being the cause of the hum.) I hope my information is accurate too. :duh
One thing that I would want to know is the amp able to be hooked up to only one channel? I would want to know if the problems is still occurring if only channel of the amp is connected at a time.
Edit: One thing to note about that manual is that it is called "Input Sensitivity" and I took that as being input impedance. Please forgive my ignorance if that is not accurate, thanks.
One thing that I would want to know is the amp able to be hooked up to only one channel? I would want to know if the problems is still occurring if only channel of the amp is connected at a time.
Edit: One thing to note about that manual is that it is called "Input Sensitivity" and I took that as being input impedance. Please forgive my ignorance if that is not accurate, thanks.