"BH" wrote in message
...
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.

Its very common to see a blue glow on the envelope when
there is fairly high voltage on the tube. I've forgotten the
mechanism but its not gas. Gas can cause a glow between
elements.
AFAIK, there is no way to re-flash the getter.


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Richard Knoppow
Los Angeles, CA, USA