• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

801 amp PS

I have the parts to build this amp from Steve Bench: http://members.aol.com/sbench/humbal.html

It's shown as a driver, but with an OPT with a cap, ala parafeed, it will be used as a low power amp for a high eff. horn. Below, I've attached what I am thinking about for a power supply. The first current source represents B+ for the output tubes and the second would power the driver stage. I show about 3mv ripple on PSUD for the power side, much less for the driver. I plan to use a 6ck4 in a hybrid bridge for slow start-up. Not shown, because I wanted to keep the drawing simple for now, is that the ps caps are likely to be 450v pieces in series, except for the driver caps. Also not shown is a bias supply. Haven't gotten to that yet, but all suggestions welcomed.

Comments much appreciated. And don't worry about insults. If it looks like I've got something wrong, it's probably because I have.

A couple of questions too: Size/type recommendations for the final caps before the B+ outputs? Also any thoughts on the transformer cap for the output stage?

Sheldon
 

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