This circuit with an unusual configuration was found in the January 1974 issue of Radio Electronics magazine. The frequency is given by L1/C1, and the transistors admit equivalents.
This circuit from the 70's used germanium transistors and operated in the range of medium and...
Found in a 1965 Electronic Design, this circuit produces a signal with the waveform shown in the...
Unlike the previous detector circuit, this includes the inverter not requiring a high voltage...