N° of component 

Simple Diodes Tester (CB1498E )

With this circuit general purpose diodes and rectifiers can be tested with ease R has 100 ohm for transformers of 6 V and 470 ohm for transformers of 9 V. The transformers can have currents of 50 to 300 mA.


Circuit Bench

  • Transistor AM Radio (CB1389E)

        The coil of this receiver consists of 100 turns of wire 38 to 30 in a ferrite rod and the...

  • 10 Hour Timer (CB1502E )

         We find this circuit in a 1973 technical documentation. Common transistors may be BC548 and FET or...