Power source for tubes (T384E)

This experimental bench source was found in a modern book on tubes. The components used can be easily obtained.

Colpitts Oscillator (CB6185E)
This circuit was obtained from an American 1980s documentation. The frequency depends on the...
Current to voltage converter (CB5094E)
This circuit was found in an American documentation. Its purpose is to allow the use of a digital...
Microwave Field Strength Meter (CB5187E)
The sensor diode used in this circuit is the common type of germanium. Experiments may be made...