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.
This circuit, which uses common components even today, was found in a 2001 documentation. It is an...
This circuit of old American documentation (1965) can be applied to any transistor. | Clique na...
Found in British documentation two years 70, this circuit generates two beats, being one of 800 Hz...