This circuit was found in a 1980s documentation for amateur radio. The circuit is for 9 MHz signals and values in parentheses for FI of 455 kHz. The circuit can be adapted to other frequencies.
Originally, this 2000 documentation circuit was created to operate as a sensor for the parallel...
This 1968´s amplifier uses a JFET at the input to increase the impedance. Voltage gain is high,...
Suggested by American documentation from 1968, this circuit divides the frequency of synchronized...