This circuit was found in American documentation from the 90's. The circuit applies to any operational. The power supply can be between 5 and 15 V depending on the operational.
This circuit was obtained from an 80's Radio Electronics. The circuit decodes “scrambled” or...
This circuit uses a JFET at the input to increase the impedance. The circuit has a gain voltage...
Found in a 70s RCA manual, this circuit uses transistors from the era. Equivalent types can be...