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.
The standard lamps consist of features of great importance for the test and repair bench. It is...
This good power amplifier was found in a Japanese magazine from the 1970s. The circuit uses...
This circuit for incandescent lamps was found in a 70s documentation. The circuit uses an SCR...