[Boatanchors] Smart People: Gassy Tubes Reversable?

[Jim Wilhite]

Dave here is some information about the blue glow.

http://www.thetubestore.com/Resources/Matching-and-other-tube-info/Blue-Glow

http://www.jacmusic.com/techcorner/ARTICLES/English-neu/blueglow/blueglow.htm

Now the wandering frequency in an oscillator can be another story, but there 
can be several causes.

Jim
W5JO



>
> ----- Original Message ----- 
>
> Been doing some work with master oscillators.
> When used in a oscillator stage, gassy tubes "wander around"
> once they heat-up.  The more gas, the more they wander.
> I've had several tubes that show no gas response at all
> on a TV-7 but when installed in-circuit, they "take a walk."
> I believe it's gas because I have a couple of tubes with visible "blue 
> glow" that show one extreme of the effect
> and non-gassy tubes that show the other extreme.