This circuit uses a resonant reed switch at the trigger frequency. The circuit is from General Electric in a 1966 documentation. This type of component is rare today.
This receiver for optical signals is optimized for operation in high noise locations. We find it...
This configuration is from the 70s, having been found in an American documentation. The...
We found this circuit in a 1998 documentation. L1 has 3 turns of wire 16 in the form of 8 mm...