power supplytroubleshootingvacuum-tube
So I started working with troubleshooting a channel imbalance on the schematic attached, 12ax7 + 6L6GC push pull.
But the problem seems to be a bit different…
My voltages seem to be a bit hot!! (a lot hotter I think…)
V2 is even higher than C16 450V rating :S
Please see attached. Any locations/components I need to check first? Thanks a lot.
Use a vacuum tube time delay relay. (Check Ebay)
Hook it up across the mains, with the NO contacts in series with the HV output.
Then, when you turn on the amp, the heater in the relay will close the contacts some time after the tube filaments/heaters warm up and supply HV when everything is ready for it.
That is not a schematic.
Yes, you can use it, with a full-wave bridge rectifier. Instead of grounding the (nonexistent) center tap of the transformer you ground the minus side of the bridge rectifier.
Similarly one side of the filament should be grounded rather than the (nonexistent) filament winding centre tap.
simulate this circuit – Schematic created using CircuitLab
Be extremely careful and don't electrocute yourself.
Best Answer
After reviewing tube amplifiers with similar power supplies (identical probably) the voltages seem ok. There is a little variation between channels but I think its within normal operation.
From "Peavey-Triumph-Schematic.pdf"