6146 blue glow

[Bill Turner]

On Sun, 18 Jan 1998 07:21:41 -0800, Steve Lords /WA7ISL
<sklords at sprynet.com> wrote:

>greetings
>  other then a gassy tube, it there any
>reason why a 6146 has a blue glow
>when under load..
>
>thanks
>steve
>wa7isl  :)
>
_______________________________________________________________
Depends on where the blue is.  Many tubes will show a faint blue glow
on the inside surface of the glass, which is normal.  I was told years
ago that it was an x-ray effect, but I don't know that for sure.
Anyway, it IS  normal and not a sign of trouble.  On the other hand,
if the blue glow is in between the working elements, the tube is gassy
and is on its way out.

73, Bill W7TI

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