[Phlogiston]

I posted a video on my blog of a gassy 280 that is so gassy that it forms an ion cloud as I switch from side to side (plate to plate). This is also a great demonstration for a beginning radio fixer of what gas looks like in a tube. I do this for my own entertainment (yeah it does not take much) and it usually takes up to 7 or 8V on the filament of a gassy rectifier to get it to conduct at all. The purple glow is usually contained within the plate structure.

For your amusement:

http://www.russoldradios.com/blog

[klondike98]

Cool...

[Radioroslyn]

Tried beano???
Terry

[Phlogiston]

I'll bet yours doesn't glow in the dark.

I have tried putting them in the oven at 500 deg for 2 hours to reactivate the getter. Doesn't help.

Edit: with the Bakelite bases removed.

[KCMike]

Good Picture and useful info. I like the rest of the site also.

[Arran]

 I have a gassy balloon type 24 (or 224) that produces a nice glow like that, not to mention pegging the meter on the tube tester. Since it was supposed to be a good testing tube when I bought it, along with a #47, the seller sent me a refund. With regard to reactivating the getter I think that you would have to use an induction heater since that's what they used originally. For all the glory of globe style tubes you seem to run into more gassy ones then with ST style tubes, not that ST style tubes are immune of course.
Regards
Arran

[Jayce]

That's exactly what that 80 was doing in my 118H when I got it and on my tester. Didn't even have to watch the video to know what you were talking about! Sadly, my current tester does not have a gas test like my other one did, but that 80 was doing that same bit at the regular voltage and it was causing the transformer on the radio to overheat.

[Phlogiston]

That's exactly what that 80 was doing in my 118H when I got it and on my tester. Didn't even have to watch the video to know what you were talking about! Sadly, my current tester does not have a gas test like my other one did, but that 80 was doing that same bit at the regular voltage and it was causing the transformer on the radio to overheat.

Mine all do have gas test(ers). I really would not count on them. better to look for the purple glow and low or what seems to be really good performance (be suspicious if the meter pegs as mentioned).