Low noise amplifier (T466E)

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

SCR Delay Circuit (CB14713E)
With the capacitor used, this circuit provides delays of 40 to 60 seconds. Larger capacitors can...
Stepper Motor Control (CB21247E)
Found in an Electronic Design from the 90's, this circuit generates signals for stepper motor...
Tunnel Diode Oscillaor (CB4602E)
The circuit shown in the figure can generate signals up to 1.6 GHz. Coil L1 and capacitor C2 are...