Quote:
Originally Posted by old_coot88
Definitely not normal. If the glow uniformly fills the entire space inside the tube, it indicates a gassy condition. And the tube will usually run abnormally hot.
|
I wouldn't say that the entire envelope is filled. By looking up into the cage from below you get a good viewing angle of the rectifier. The glow is inside the thimble shaped portion (plate?)
I want to add that I didn't even realize what kind of an expert is helping me here. I have seen some amazingly well done videos by you on Youtube. It started when I was looking for and acquiring an old tuning eye capacitor tester so I can properly test my old caps. I ended up with a Heathkit C-3, but I am completely jealous of the out of this world unit that you demonstrate in a video. I can't recall the brand, but it had voltage and current meters and you give one heck of a demo!
Also, I remember you admiring your Hickok 209-A VTVM as one of the best pieces that you had on hand. I have one that I really want to get going. Like most older equipment I imagine I will have to replace a lot of capacitors to get it to function well. As it stands nothing about mine is accurate.
Glad to have you on my side in this Zenith project! Maybe I will start a Hickok 209 thread next!
