This Vox circuit uses a specific Motorola component. We found the circuit in the 1990 Linear Databook of the same company. The transistor must be in accordance with the switched load.
This is one of the many hysteresis comparator circuits the reader may find in this section and on this...
This circuit is from a Radio Electronics from February 1971. The SCR is load controlled and the...
Found a documentation on PCs from 1996, this circuit can be used as a shield. The relay is rated at...