This squelch circuit is placed at the input of the single receiver audio amplifier stage. Its purpose is to silence background noise. The circuit is from an 80's documentation.
This circuit is more elaborate than the previous one, employing an integrated amplifier circuit of the...
This is a possible circuit for the receiver of the previous circuit. Other circuits can be found...
Static charges in objects Dan be detected by this sensitive electroscope. The meter indicates when the...