I have a Kustom "Frankenstein" style head whic I can't ID. It does not appear to have any numbers on the PCBs. It is very bare bones, two channels, Treb, Bass, Volume each channel, six TO-3 RCA transistors on the back labelled 36892. No "200" on the front plate, just "Kustom", but I am assuming that's what it is. It looks all original, everything coated in a fine layer of grease, it works but has odd intermittent bursts of noise, kind of like an AM radio during a lightning strike, almost like dirty pots but it happens on both channels and is independent if turning any of the controls. The controls do what they are supposed, volume makes it louder, bass makes it brassier, treble makes it trebly. I haven't made any measurements yet, because I am hoping you guys might steer me to the closest PCB schematic. I assume there is a lot of similarity in the boards?