National (Valco) 1215 amp layout

[Doclinz]

Picked up ‘52 National 1215 tube “project” amp. No tubes were installed in the amp. I have a schematic and could likely figure out what goes where re proximity to other components / pin config, but…if anyone out there has one of these amps and could help with tube layout, this would be greatly appreciated.

[Stevem]

There is s early and late version of this amp.
One uses all large 8pin tubes sockets, and the in the other two of the sockets are the smaller 9 pin type .

Which version do you have?

[Doclinz]

All large sockets. On closer inspection, I’m finding engraved tube designations on 5 of the 8 sockets.

6JS7 on the 2 closest to L side (one directly behind the other).
Moving along the back ‘row’ to the R:
6SN7
6SL7G (schematic shows 6SL7)
6SN7
In front of the 6SN7 and the PT are 3 unmarked sockets,which must be the 5U4G rectifier & 2 6L6G tubes.

I guess I may be stuck doing a bit of circuit tracing regardless, but it should be easier than I had imagined.

Can consider this one closed. I’ll post a layout when I determine the remaining mystery sockets.

[martin manning]

I guess I may be stuck doing a bit of circuit tracing regardless, but it should be easier than I had imagined.

Piece of cake. The rectifier is easy to identify. Only four of the eight pins are connected, and all but one of the leads will go to the power transformer..

[Phil_S]

6SL7G (schematic shows 6SL7)

"G" means glass tube rather than metal jacket. Either will be OK, as long as you have a good tube.

[Doclinz]

Got it!

Fairly easy and intuitive. Thanks for the tips.