These three objects consist of a single sided PCB with a blue plastic connector with 22 flat contacts, the two ends of which are slightly wider riveted to one end of the board. The other three sides are surrounded by a metal frame, also riveted to the board. Six sets of identical transistors, diodes, resistors, and capacitors make up the bulk of the circuitry; a few additional components are common to all of these.
Manufacturer
SRL Data
Identifying Numbers
Model number
GP101
Stamped in the metal frame opposite the connector end.