RH84 amp power supply

[mdpaudio]

I’ve switched to SS rectifiers a long time ago. It has many pluses, no real voltage drop compared to tube rectifiers, the ability to use larger caps as C1. They are much cheaper, and don’t need a filament winding on the power transformer which lessens the load on it. That results in less heat in the transformer and that of the rectifier tubes heat.If you are drawing a lot of current newer rectifier tubes are less reliable in general compared to vintage ones. With enough of a capacitor bank they can be very quiet and have almost no sag. Some people say they are evil and must never be used in a tube amp, I’m not that fanatical. Try em it’s cheap enough.

 

[Chris Hornbeck]

ways to mitigate the ringing, but still using semi-con rectifiers, by RC dampers and such. See especially Mark Johnson's work, ref: "Quasimodo".

Also see earlier work by Morgan Jones in LA vol5 and Mark Johnson in LA vol10. This is a subject where generalizations can mislead us and Truth lies in the details, dwelling along side God and the Devil.

All good fortune,
Chris

 

[6A3sUMMER]

vlodek3055,

Good Point. Single Ended Amplifiers, Yes.

Class A Single Ended . . . B+ Generalizations:

For the same Constant DC Load current:
The power transformer that powers a Choke input B+ filter, runs Cooler
The power transformer that powers a Capacitor input B+ filter, runs Hotter

For the same Constant DC Load current:
B+ ground loops:
A Choke input filter has smaller transient current, with slower rise time, and creating much Lower harmonic interference.
A Capacitor input filter has larger transient current, faster rise time, and creates much Higher harmonic interference.