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New GSG build. Wood base. 6B4G. pics

PostPosted: Tue May 27, 2014 9:23 am
by denverartist
This my GSG build using various vintage parts for the base and chassis. I didn't want to crowd onto a small space. Fun to build.

Pete

Re: New GSG build. Wood base. 6B4G. pics

PostPosted: Wed May 28, 2014 5:33 am
by Shannon Parks
The rear chassis vent is oh so old school! Love it. What was it re-purposed from, Pete?

Shannon

Re: New GSG build. Wood base. 6B4G. pics

PostPosted: Wed May 28, 2014 10:18 am
by denverartist
Thanks.
The metal plate was cut from the lid of an older Marconi lab instrument, thick aluminum, but easy to drill.

My B+ and other DC voltages downstream are about 18-20V low, though my transformer is the recommended Triode and the PS parts only vary by a little (2.3Hy choke, 20uf film cap first position off rectifier, etc.) I may try another 6AX5 rectifier tube.
EDIT: Voltages now spot-on with better GE 6AX5GT rectifier tube.

It is settling in very well, and sounds great. For now, using my non-Hi-eff speakers while building new Hi-eff speakers.

Using the original grounding scheme - no connection between floating ground on board and earth on AC plug. And no turn on pops.

Really like it.

Pete

Re: New GSG build. Underneath

PostPosted: Mon Jun 02, 2014 2:06 pm
by denverartist
A picture of the underside, in case anyone's interested.