05-10-2018, 06:31 PM
To flesh out what I said above, this amp seems to have three ground point:
1. The preamp is grounded to a tab on the cap can.
2. The 6V6 cathode resister and bypass are grounded to a different cap can tab.
3. The trem is grounded to a tab on the input jack.
Also, the volume, tone, and intensity pots are grounded to themselves.
Now, here's the rub. The cathode resister for V1b (trem) runs through the foot switch and is grounded to the preamp ground. That is the correct ground for the reverb, but not for the trem. The cathode bypass cap for V1b is grounded to the trem ground: the input jack. This seems like a problem, as the V1b cathode has two grounds on opposite ends of the chassis. I'm not quite sure what the best way to address this is, so I'm going to sleep on it.
1. The preamp is grounded to a tab on the cap can.
2. The 6V6 cathode resister and bypass are grounded to a different cap can tab.
3. The trem is grounded to a tab on the input jack.
Also, the volume, tone, and intensity pots are grounded to themselves.
Now, here's the rub. The cathode resister for V1b (trem) runs through the foot switch and is grounded to the preamp ground. That is the correct ground for the reverb, but not for the trem. The cathode bypass cap for V1b is grounded to the trem ground: the input jack. This seems like a problem, as the V1b cathode has two grounds on opposite ends of the chassis. I'm not quite sure what the best way to address this is, so I'm going to sleep on it.