Voltage amplifier with the 37 tube (T392E)

Found in a modern design book with tubes, this stage with the triode 37 has a plate current of 3.7 mA.

1 Transistor MW Radio (CB18393E)
This elementary receiver with a crystal earphone was found in Japanese documentation from the...
20 MHz Oscillator (CB14153E)
This stable 20 MHz oscillator was suggested by the National Semiconductor's Linear Applications Handbook...
Modulated Power Supply For LASER Pointer (CB1184E)
This circuit allows controlling a LASER pointer with an input logic signal. R has 10 ohm for 3 V...