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 double T oscillator configuration can employ operational diamonds and the symmetrical supply...
We found this interesting transistor generator in European documentation from the 1980s. The...
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...