This is a Simple TR Circuit Diagram. TR is a circuit breaker test equipment . It is a simple and fast operating equipment for the maintenance and commissioning in testing. This circuit use R1 and R2 are Va or Vi W carbon composition resistors. K1 is a 12 V DPDT DIP relay. Illustration A shows how to connect the relay contacts for use with a separate transmitter-receiver combination. The circuit at is for amplifier use with a transceiver. Cl and C2 are disc ceramic.
Simple TR Circuit Diagram
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