6AC7 Amplifier (T450E)

Obtained in MIT documentation, this 4-stage circuit has high gain for small signals. The power supply sources 150 V.

Shutdown for exhausted battery (CB8387S)
When the 24 V battery voltage drops below 18 V, this circuit cuts off its discharge. The circuit...
Source for Electrolytic Recovery (CB12857E)
High voltage electrolytic capacitors can be recovered by applying high voltage to their terminals. This...
High-speed optocoupler (CB12759E)
This shield circuit is suggested by Motorola, using a 4N26 type coupler and an MC1733 type...