Tube power supply

[scorron]

I have a couple tube projects in mind, including a build of the Valve Wizard's phono stage. I'll be designing toward powering that circuit, first, but would like to have the power supply stand-alone in a separate chassis, so I might recycle at a later date, for another project.

I've repaired several tube amps, radios, an oscilloscope, but never designed anything myself, other than to tinker with coupling capacitor values in my amp (http://seancorron.com/blog/2020/01/30/my-latest-project/).

I've got a salvaged tube transformer from an RCA WO-88 oscilloscope (had an "average power consumption of 40 watts"). It seems to have two 6.3v windings (one center tapped, so 12.6v available I think?) various HT taps, and a shield. Schematic and photos of the transformer attached.

Would this transformer be good for this?

Can anyone recommend a power supply circuit? Other than copying the power supply section from the 'scope and modifying for the voltages I desire, what other things might I want to consider?

Is a rectified heater supply always preferred?

Thanks for any tips you might be able to provide!
Sean

 

[rayma]

I'd copy either the Heathkit IP-17 or the IP-32 HV supply. They are simple circuits with
variable output voltage that are reliable and work well.

 

[v4lve lover]

I'd take the tube rect part from the manual, after that a simple regulator with EF184/6EJ7 85A2 and EL84/6BQ5

 

[scorron]

Thanks for the thoughts. The Heathkit might be a bit higher component than I'm aiming for. I don't mind a little redesigning if I repurpose the power supply for a later project.

Any suggestions for a high voltage cable between the power supply and phono stage? Ideally something detachable.

I have a couple full wave rectifier tubes lying around, but would a bridge rectifier be a better choice?