07-19-2019, 09:48 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
Here is a link to the data sheet: https://frank.pocnet.net/sheets/049/0/0A3.pdf
