Electronic testing devices namely, testing and indicating circuits for displaying visually the existence and direction of electrical current flow in magnetic recording circuits by selectively energizing one of a pair of lights for each recording circuit, said circuit especially for use in billing tape recorders.
Electronic testing devices namely, testing and indicating circuits for displaying visually the existence and direction of electrical current flow in magnetic recording circuits by selectively energizing one of a pair of lights for each recording circuit, said circuit especially for use in billing tape recorders.
Electronic testing devices namely, testing and indicating circuits for...
