I’m thinking of building a tube headphone amp for my Stax headphones, based on some schematics floating around on the Internet. The headphones requires a bias of 580v to create an electrostatic field. My plan is to build an amplifier with output transformers. One thing I’m not really clear is if there is any relationship between the bias voltage of the headphones and B+ of the amplifier? I’ve heard else where that the B+ shouldn’t be more than the bias voltage, not sure if that was applied to OTL or OPT amplifers? How high with B+ could I go? 580v is “low” voltage to me, considering all my amps were all over 1kV.
Any explations would be much appreciated.
Cheers
Any explations would be much appreciated.
Cheers
Transformers change voltage. If you are going to have "a transformer", you can step-up from a 12V chip-amp or a 100V 25L6 tube to your hundreds of volts around 560V.
So this is not yet A Plan.
However it is awkward to build multiple power supplies. It is synergistic to get the bias from the same supply used to run the amp. This leads naturally to a 560V supply to a center-tapped choke yanked by two high-voltage devices.
So this is not yet A Plan.
However it is awkward to build multiple power supplies. It is synergistic to get the bias from the same supply used to run the amp. This leads naturally to a 560V supply to a center-tapped choke yanked by two high-voltage devices.
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