An article in Radio Electronics magazine from November 1958 showed the construction of this tube audio oscillator. Note the use of lamps as a stabilizer to obtain better sinusoidal signals.
This circuit inverts the signal of any logic using a general purpose PNP transistor. The supply...
We found this conventional version of a single-transistor oscillator in the January 1996 issue of...
The circuit is from a 1978 publication and the transistor may be the BC558. The transformer is...