Hi everyone, I have an idea for a High voltage PSU that uses voltage direct from the mains without a transformer but I doubt its safety. If it were used it would most likely be in an audio valve circuit to provide about 330VDC to the plates.
A 6.3V transformer would be used to power the heater filaments on AC and the input signal would be decoupled from DC (in the case of a fault) using a line level 1:1 audio transformer driven by an op amp. The live and neutral are on a completely separate circuit to the safety earth which would be connected to an aluminium chassis.
I can't find any examples similar to this design so I'm wondering if its safe practice?
A 6.3V transformer would be used to power the heater filaments on AC and the input signal would be decoupled from DC (in the case of a fault) using a line level 1:1 audio transformer driven by an op amp. The live and neutral are on a completely separate circuit to the safety earth which would be connected to an aluminium chassis.
I can't find any examples similar to this design so I'm wondering if its safe practice?