Quote:
Originally Posted by vortalexfan
Unfortunately I have a sad update on this old DuMont TV, The 19AP4 Tube is a dud, I went to try and test it with my old picture tube tester and the tube filiments weren't glowing, so I'm guessing the tube must of went to air...   |
Before you declare it dead check the heater pins for continuity. Sometimes the solder in the pins fails or the wire outside the glass corrodes open...Both are usually fixable (the latter with a fair bit more effort than the former). If you have heater continuity and with 6.3V applied it doesn't glow but the neck gets very warm very fast then you can be confident it's gassy.