Low noise amplifier (T466E)

Found in 1948 MIT documentation, this 4-tube amplifier is characterized by its low noise level.

Regulated Inverter (CB5144E)
This DC / DC converter was found in an American 1980s documentation. It provides a negative...
Optical relay activator (CB8395E)
Found in a 80s American documentation, this circuit pulses a lamp for optical relay tests. The...
Instrument Amplifier (CB393E)
This circuit has very high input impedance and a differential input. The gain is 1,000 and the...