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vecher
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#1

07-19-2019, 09:29 PM
How do you test a 0A3 Tube.. Its not listed for my Hickok 600A

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mikethedruid
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#2

07-19-2019, 10:48 PM
The 0A3 is a cold cathode voltage regulating tube. It operates a bit like a neon bulb, and will glow when in operation. You can check if it is working by measuring the voltage between pins 2 and 5 while it is in operation. The voltage shouyld be about 75 volts.
Here is a link to the data sheet: https://frank.pocnet.net/sheets/049/0/0A3.pdf
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morzh
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#3

07-19-2019, 10:56 PM
It is same as Zener for solid state.
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  1. The PHILCO Phorum
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