Magic eye test (T424E)

This circuit tests the 6AF6 magic eye indicator tubes. The circuit is from modern documentation that suggests tube circuits for modern experiments.

Emergency Lighting (CB4321E)
We found this circuit in a 1986 documentation. Its purpose is to power a set of light bulbs (or...
Instrument amplifier (CB20524E)
This circuit to increase the sensitivity of instruments to 100 uA (or close to it) was found in...
Current Monitor (CB5137E)
This circuit was obtained in the manual of the used integrated circuit. Equivalents may be used...