In Reply to: RE: Regulated power supply? posted by drlowmu on January 25, 2012 at 09:01:23:
.
At first I had problems with bias drifting along with the line voltage drifts. I am using stacked supplies so when B+ drifts with the line voltage the bias drifts.
Solution, use an AC regenerator. I bought a Crown pro audio 600W amp on sale, a low distortion sine wave generator, and a 3:1 power transformer hooked up backwards to the speaker outputs on the Crown to get a very stable, very clean, 120VAC. Added benefit you can control B+ and play with varying the input frequency.
I know there are off the shelf solutions but that's no fun and more expensive.
Oh, I can't generate enough juice to run the filaments too so they run off their own transformers hooked to the wall, not the regenrator.
.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- I make my own AC to solve that problem - bwb 11:12:38 01/27/12 (0)