This TV remote control receiver uses a ratchet system to activate an old drum-type selector to change channels. A common system at the time. The circuit is from a Radio Electronics from February 1961.
Molex is using the FFC / FPC Premo-Flex jumpers for inter-board and inter-plate interconnects...
This circuit was found in an American publication from 1968. The transistors are from the time,...
This circuit is from 1971 documentation. It generates a ramp given by the input signal. The FET...