New GSG build. Wood base. 6B4G. pics

2nd harmonics for the masses

New GSG build. Wood base. 6B4G. pics

Postby denverartist » Tue May 27, 2014 9:23 am

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

Postby Shannon Parks » Wed May 28, 2014 5:33 am

The rear chassis vent is oh so old school! Love it. What was it re-purposed from, Pete?

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

Postby denverartist » Wed May 28, 2014 10:18 am

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
Last edited by denverartist on Tue Jun 10, 2014 6:16 pm, edited 1 time in total.
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Re: New GSG build. Underneath

Postby denverartist » Mon Jun 02, 2014 2:06 pm

A picture of the underside, in case anyone's interested.
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