This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is intended for loads controlled by triac and the resistors depend on the desired control.
This wireless stapler transmits telephone conversations to an FM receiver at up to 50 meters. The...
This automatic switch for multiple loads was shown in the May 1983 issue of Radio Electronics...
Created to serve as a booster for TV signals in the UHF band, this circuit was found in the March...