The signals from this circuit obtained from the 1965 Radio Shack documentation are picked up from a medium wave receiver. L1 and L2 have 80 to 100 turns of yarn 28 on a ferrite rod.
This circuit is from a 1980s documentation featuring two time constants for sound decoding. The...
This circuit alternates the activation of two pumps depending on the position of the float. The...
This circuit was obtained from the December 1985 issue of Radio Electronics magazine. The circuit...