CurtZHP
Well-known member
ruffrecords said:I thought you had them connected to separate secondaries - or was that a different thread???
Anyway, there is no way you can have two separate bridge rectifiers operating off the same winding - it will cause horrible hum.
Cheers
Ian
As it sits right now, I've got two 15VAC secondaries. One is feeding a bridge rectifier for the filament supply. The other feeding the voltage multi for the phantom AND the step-up transformer for the plate supply.
Now, I don't know if this matters or not, but the bridge rectifier for the filament supply and the bridge rectifier for the plate supply share a common ground.
As I was drawing out the grounding scheme to better illustrate the problem, I came across something that might be the cause. There was a jumper wire going from the ground of the phantom supply to the ground(s) of the tube supplies.
Two issues here:
1. When I followed that path with a pencil on paper, it formed a loop. (Not surprising...)
2. It puts me back in the same boat I was earlier, when I had the multi on the same winding as the filament rectifier, which caused a nasty short.
I need to eliminate that jumper!