This oscillator that generates signals below the audible range (sub audio or infrasound) was found in a 1965 documentation. Transistors are for general use.
) We found this circuit in the November 1992 issue of Radio Electronics magazine. The 30V power...
This circuit is from General Electric documentation from 1965. The SCR and unijunction transistor may be...
Found in a publication from the 50's, this circuit uses a germanium transistor of the time. The...