#1
I am modding an old gibson 10" combo, a Maestro M-201. I have replaced the electrolytic caps, and added a tone stack from a champ schematic. I have also replace the output transformer and speaker.

Here is the original schematic:



And here is the modded schematic:



I tried it out last night, and got nothing more than a very faint hum. (I have the original speaker in it now, because even though it has a tear in it, i wan't to make sure everything is in order before i hook up the ridiculously expenzive new one.) When i switched it off though, you could suddenly hear what i was playing, though still faint, it was there for a second then faded.

Does this symptom set off any obvious areas to troubleshoot? Is there something wrong with my circuit design? Any help is appreciated.