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 also makes use of a field effect transistor (JFET) which can be the BF245 and has an...
This Hartley oscillator can be used in tests or as a signal injector. The transformer is the type...
This circuit is from a 1981 publication. The DC supply can be made with voltages from 6 to 12 V...