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In Reply to: RE: grounding questions.... posted by vinnie2 on April 28, 2015 at 05:23:34
What started out as a simple little project to convert my old 300B amp into a test mule has blossomed into a major undertaking. I really do want to have the B+ adjustable for trying different designs, but even if I was willing to pluck down the $100 plus they want for one skookum enough to do the trick, there is no room on the old psu chassis for it. I suppose I could build a variac module and use that, but I already have a good variac.
Soooooooo it looks like I will have to go with 4 chassis instead of just two; one for the B+, one for the filaments and two others for the right and left channel tube and opt modules. Fortunately I have the last two already made from a previous breadboard project, so that will help.
Thought I would make one last plea for any other ideas anyone might have that would allow me to use just the two chassis from the old amp instead.
Edits: 04/29/15Follow Ups:
What you are up against is that you have not sorted out what direction you really want to go and so are trying to be all things to all tubes.
What you want is something like an old tube Kepco power supply like the one at the link. That way you can mule out to anything.
Yep, that is it in a nut shell. I guess I will just have to go with the 4 chassis. I think I will skip the bias voltage and just pull that with a voltage divider when I need it.
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