Found in a QST magazine from the 90s, this powerful unit is intended to supply a VHF transceiver for the 144 MHz band with 1.2 kW of power.
This VCA was found in the July 1988 issue of Radio Electronics magazine. It uses an OTA op amp and...
Found in US documentation, this circuit changes the waveform and phase of a sine signal. The...
Found in an American amateur radio documentation by the name of “antennascope” this circuit is...