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 fast circuit was found in an ancient American documentation. Output conversion speed is 30 ns and...
The filter shown in the figure can operate with frequencies up to several tens of megahertz thanks...
This audio amplifier has an internal DC volume control with logarithmic characteristics and a...