[ForSale-Swap] [Boatanchors] "burning" in tubes

[J. Forster]

There is SOME rational for doing this. Tubes go gassy just sitting on the
shelf, especially if they have been sitting for decades.

Putting them in a circuit with filament/heater and B+ applied, but the
tube biased to cutoff, will help the getter scavange any gas molecules in
the tube.

Note, simply applying filament/heater power w/o B+ is NOT going to work,
because most getters scavange ions, NOT inter gas molecules. Do not leave
the grid floating either.

-John

=============



> A friend of mine says that now that I've put in a new pair of 572B tubes
> in my FL100B amp, I should let it sit, turned on, for 5 hours.  He says
> that burns in or breaks in the tubes before I put it in line on the air.
>
>
>
> True or just one of those old ham tales?
>
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