Quote:
Originally Posted by rickfray
Thanks, I'll have to find out where to turn in my EE degrees for not thinking about that. I disconnected the other end so I could remove the chassis. The only markings on the tube is a label that says 21EAP4. Is it still inconclusive whether it's 2.34 or 6 volts until I do the current test?
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In my humble opinion you will not know conclusively until you do a current test. I have seen tubes marked 21EAP4 that turned out to be 6.3V tubes. It's a great feeling when you discover one of these 6.3v tubes that are incorrectly marked because it almost certainly means that someone else passed it up thinking it was dead.