This frequency triple oscillator circuit was found in an American publication in 1967. The FET is current and more detailed information about the coils is not given.
This simple receiver for listening on a crystal phone tunes the range of medium waves. The circuit...
This simple general-purpose circuit was found in a 1987 publication. It is a simple preamplifier powered...
The circuit shown is from a Texas Instruments opto-electronics manual. RE depends on the peak...