This sensitive two-transistor circuit was found in the June 1965 Radio Electronics magazine. The circuit has low drift and uses an analog instrument. The input resistance is high.
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...