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 Hartley telegraphy oscillator operates with the transmitter signal generating a tone in a...
This circuit is used to test a triac and also to teach how it works. The load is an incandescent...
The purpose of this circuit is to re-trigger slow scan circuits used in the 1980s on low frequency...