Gentlemen,
A previous post mentions a phenomenon wherein is written
"parasitic oscillation" and what I deduce as filament sag.
Is it possible that these two conditions are related?
It is understood how a strong magnetic field within the tube envelope
can perhaps alter the filament geometry, but can this happen as a result
of a VHF "excursion?"
Respectfully,
Hal Mandel
W4HBM
[SNIP]
> Hundreds of empirical observations from all makes of amplifiers must be
> wrong. Clearly, the problems must be the mysterious parasitic
> oscillation, which obviously is pushing the filament sideways.
[SNIP]
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