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 oscillator has the output sine waveforms stabilized by a MOSFET. Equivalent types can be...
We found this synchrodyne receiver for the medium or short-wave band in the Radio Electronics...
This amplifier is suggested by Sanyo, for radio and recorder applications and makes use of a...