I have just bought up about 6 old field coil speakers 30s/40s, and want to use 1 in a custom guitar amp. Going to base it off an old Valco amp design with a 5y3 rectifier and 6v6 in push-pull...
The schematic I am looking at is here: http://music-electronics-forum.com/attachments/27667d1393246245-supremewtonecontrol.jpg
Any idea what the 6v6 plate voltage would be on this one, I am guessing its meant to be about 250?
Main question is, how should I power the field coil?
Using it as a choke in the main power supply seems like it might be asking for a noisy amp, but then that might be where the magic is!
Should I add some additional filtering before the coil, or would it be better to give it a separate power supply, or just keep it as the main filter choke?