Indicated for alarm applications, this circuit was found in the December 1976 issue of Radio Electronics magazine. The circuit is for 12 V car applications.
This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit...
This squelch is activated by its own noise, acting automatically. It is used in communications...
In this circuit of the 1980s, the T1 transformer has 30 turns of 28 primary wire and the secondary...