Quote:
Originally Posted by Electronic M
N701 appears to be a neon bulb...They are supposed to glow orange. They were often used like zezer diodes are now. A gas regulator diode tube (0Z4 for instance) is basically a fancy version of that.
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Just a minor quibble and off topic, but a NE-2 does not pull enough current to function as a supply regulator. A for-purpose tube (like the 0B2) has to shunt a large enough percentage of the supply current in order to regulate.
0Z4 is a cold cathode rectifier for car radios (though possibly it could be re-purposed as a regulator in some one-off project.