On Jun 25, 7:12*pm, wrote:
The following web page shows several photos of vacuum tubes that glow
because they’re either gassy or induce florescence in the their glass
bulbs. *Although the English is a little choppy, the narrative and
pictures are informative:

* *http://www.jacmusic.com/html/article...w/blueglow.htm

The author claims he’s revived gassy tubes by re-heating the getters.
Has anyone tried this?

-Dave Drumheller, K3WQ

Sounds like hog wash. No blue or blue in tubes is probably normal.
Magenta is probably gas.