With frequency control and active cycle, this circuit was found in General Electric documentation from the 1960s. The circuit supports equivalent components.
This receiver for the mid-wave band was found in a documentation from the 60's. The transistors are made...
We found this circuit in a 1977 Radio Handbook. The circuit applies to any JFET and the frequency...
Also suitable for use as a noisy alarm, this Morse Code or telegraph practice oscillator was found...