>>So why don't we see more extensive damage in 3-500Z's with bent filaments
>>if arcing is the real cause?
>>
>>I've asked this question at least twice and no one has responded to it
>>yet. So I am asking it again.
>>
>How much damage should you expect? I don't know.
>
>Nobody has come up with a real explanation of how the forces necessary
>to bend a filament are generated, applying the same principles as an
>electric motor.
>
>The other question that's still unanswered is what was the state of the
>filament just before the event? Was it properly centered in the grid
>cage... or was it already bent, so that even a small movement would
>cause it to touch?
It still doesn't answer the fundamental question:
* According to literature (as posted by John Lyles), it is stated that
gas arcs usually cause SEVERE damage to a tube, as in melted grids, fused
grids, etc. "Bent" grids are not mentioned although, I assume they are
possible.
So the question still stands (I'll ask it again):
Is there anyone who has done a post mortem on a 3-500Z who has seen
*EXTENSIVE* damage? And I don't mean in a case where we know there was
an arc. And if this extensive damage has not occured due to arcing, then
why?
>
>The same question can be asked about burned-out resistors etc: what
>state were they in, just *before* the event?
Correct. We have no way of knowing.
>
>I don't think anybody really knows, because even the "amplifier doctors"
>and "post-mortem experts" don't start looking until *after* something
>has gone wrong.
True. Although, neither do morticians, yet they can figure the cause of
human death by working backwards. Splatter brains, a hole in the head
and a bulged piece of lead would indicate a gun shot wound. Melted or
fried grids and arc. Bent grids?????? ARC maybe, parasite - maybe.
73,
Jon
KE9NA
-------------------------------------
Jon Ogden
KE9NA
http://www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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