Masco MA25 Schematic (Four 7N7's)

[Leftof88]

Hey folks! I have a Masco MA25 that I am restoring and I am looking for a schematic. I have already obtained the Photofact for this model but it has a different tube lineup from mine and the circuit also differs. I found a second MA25 schematic but it is also not the model I have. The two schematics I have either show two 6S5F's and two 7N7's, OR two 7B4's and two 7N7's, but my amp has four 7N7's. The full tube lineup in my chassis is as follows:

(4) 7N7’s
(2) 6L6GA’s
(1) 5U4G

Does anyone have a photofact or schematic that pertains to this model? Thanks!

Bobby

 

[Wally]

If it has not been modified, you can draw a schematic as you analyze the circuit.

 

[Leftof88]

Thanks Wally - I think that's what I'm going to have to do. Looks all original to me and no one seems to have a schematic. So here goes nothing!