"Steven Swift" wrote in message
...
Over the past few weeks, I have seen postings requesting schematics for
variable tube supplies. I finally took a few minutes to scan in a
couple from the GE Essential Characteristics Book from 1969, and
to convert a hand-drawn schematic to .pdf.

I doubt that these schematics are definitive, but I built two of them
and they work on my bench. The GE 1-compactron supply also exists as a
totally solid-state version as a dedicated BC-312 supply (MosFet as
pass element and a MPSA42 as the gain stage).

I put the schematics, along with a brief explanation, up on:

http://novatech-instr.com/Fun/ge_ps.pdf

I am pretty sure the last schematic violates the specs for a 12GB3, but
it seems to be working.

Comments are welcomed.

Steve.

--
Steven D. Swift, , http://www.novatech-instr.com
NOVATECH INSTRUMENTS, INC. P.O. Box 55997
206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA

Hello Steve,

Thanks for the interesting PS links. I'm not sure of their HT current
capabilities. I've been wanting to make a good bench HT, Fil, & Bias supply,
for a while now. I have a few ham radio PS that don't quite make it.. The
major drawback is that the Xfrs are only capable of 100ma. At times I could
use a little more that 400ma. Hopefully, someone reading this thread will
come up with a viable suggestion.

Cordially,
west