Servomotor amplifier (CB20787E)

This circuit from the 70s uses an operational power amplifier from the time. The supply voltage must be according to the motor.

RF Pulse Generator (CB4132E)
This high frequency pulse generator was found in an old American documentation. The circuit makes use...
Amplifier MC14546 (CB20041E)
This small 1 W amplifier uses a Motorola integrated circuit from the 1970s. The integrated circuit...
Triac Heating control (CB21372E)
We found this circuit in a 1966 RCA manual. The integrated circuit is unusual, and the Triac must...