This was a two evening project, I did the chassis over the weekend,
and last night when the Mouser order arrived, I put together three
circuit boards and finished this amp up. I have some of the old
Johnson style ceramic octal sockets too, so it will be a simple process
to switch to 6B4G's by changing the sockets, which mount in the
same footprint, and paralleling a 1.5 ohm filament dropping resistor
across each channel to bring the voltage up to 6.3 for the 6B4G's.
Definitely a sweet sound - the bass is incredible!
more pix at http://tmamps.com