Low noise amplifier (T466E)

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

Transistor Intercom (CB1382E )
n be assembled with BC558 transistors for low power transistors and a BD136 for the output. The...
Variable Capacitance Multiplier (CB14130E)
We found this circuit in the 1994 Linear Applications Handbook from National Semiconductor. The...
Binary Watch (CB17669E)
It is an ideal assembly to be implemented as work by students of digital electronics courses, as...