Servo amplifier (T454E)

Found in a MIT publication from the 1940s, this circuit shows use in a servo amplifier. The supply is made with different voltages.

25W Transistor Amplifier (CB1321E)
We found this complementary simetry configuration in a1980s documentation. Transistors, which are...
MKP1847H AC Filter Capacitors
June 2017 - Mouser Electronics has in stock the new AC Metallized Polypropylene Film Capacitors...
Monostable Using the 4047 (I) (CB134E)
The 4047 is a monostable/astable CMOS multivibrator. The basic con- figuration is triggered by the...