Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz. Modern equivalent transistors can be used.
The SCA is a signal superimposed on the FM signals that make it possible to eliminate...
This circuit was found in the 1969 RCA thyristor manual. The circuit has a limiter (clipping) with two 12...
The transistor of this constant current source may be the BC548 or equivalent. Resistor R2 may be...