Now that my 91A amp is operational I am turning my old 300B into a test mule for future bread board experiments. It will consist of three chassis as follows:A psu chassis that has transformers for B+, 5 vac and 6.3 vac.
A tube chassis that carries a bunch of 8 pin relay sockets. I will make adapters for what ever tubes I work with. I already have them for 4 and 5 pin tubes.
A opt chassis that has opt's for pp and se amps.
I have the psu chassis mostly complete, but am unsure about how to handle the grounding. The 5 and 6.3 vac transformers each have their own switch and fuse so that I may use either or both. I also want them on their own mains power so that I can use a variac to adjust the B+ without affecting the filament voltages.
My plan for doing this is to have a multiple outlet plugged into my isolation transformer and then have the variac plugged into the multiple outlet and a mains chord going from it to the psu chassis and another mains chord from the multiple outlet to the psu chassis separate from the variac.
The psu chassis is set up with a ground bus bar right now, and I am wondering how to handle the ground of the other mains socket that I need to install for the filament transformers. Should I put a separate bus bar in for that outlet too? It would be connected back through the multiple outlet to the mains supply, but I am worried about a ground loop.
Anyone have any experience with this type of thing?
Edits: 04/28/15 04/28/15
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Topic - grounding questions.... - vinnie2 05:23:34 04/28/15 (13)
- well phooey! - vinnie2 11:59:15 04/29/15 (2)
- RE: well phooey! - Ralph 08:29:20 04/30/15 (1)
- RE: well phooey! - vinnie2 09:09:55 04/30/15 (0)
- what about a rheostat? - vinnie2 13:18:06 04/28/15 (3)
- RE: what about a rheostat? - TimeConstant 06:19:24 04/30/15 (2)
- RE: what about a rheostat? - vinnie2 09:11:39 04/30/15 (1)
- RE: what about a rheostat? - TimeConstant 10:33:39 04/30/15 (0)
- RE: grounding questions.... - Tom Bavis 11:46:07 04/28/15 (1)
- RE: grounding questions.... - vinnie2 12:19:45 04/28/15 (0)
- RE: grounding questions.... - Chip647 06:59:40 04/28/15 (3)
- RE: grounding questions.... - vinnie2 08:58:19 04/28/15 (2)
- RE: grounding questions.... - Chip647 11:39:53 04/28/15 (1)
- RE: grounding questions.... - vinnie2 12:21:58 04/28/15 (0)