Got the amp working without the schematic, shorted 12 volt zener.
The lighted power / polarity switch is intermittent.
Anyone know of a replacement part for this?
Isn't it a 3 position, center off, push-in, black rocker with a red neon pilot lamp? Maybe Mouser?
And mathes-amps, it would help if you include PC board numbers in your requests for schematics, as Kustom used the same boards in many of the amps of this era. Although the zeners are only shown on the main wiring layout of the power supply.