The difference between this circuit and the previous one is that it uses PNP transistors. The circuit is from Radio Electronics magazine from July 1968. The frequency depends on R1 and C1.
Using an era germanium transistor, this 1960s circuit reverses the phase of relatively low...
This circuit uses amplifiers from the 60's American company Microlin. The circuit can be designed...
The idea of this circuit found in a Radio Electronics from January 1966. The idea of the...