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.

TRIAC Test Using the Oscilloscope (MSB080E)
This circuit is used to test a triac and also to teach how it works. The load is an incandescent...
Monostable Using Transistors (CB927E)
I found this circuit in an ond publication from 1958. The transistors are germanium types but the...
300 mW to 1 W Amplifiier (CB399)
This circuit can be powered from 4 to 12 V sources. Pin 6 is the positive supply. See more about...