PTT or Push to Talk is the control that switches the speak-hear function on a transceiver. This circuit was found in the magazine of radio amateurs 73, in an edition of the 90s.
This circuit is from old American documentation, but the components used can still be found quite...
This FM transmitter was found in a 1997 magazine but can still be easily assembled. 18-wire in the...
This circuit uses two diodes in a doubling configuration to receive medium-wave range signals. The...