I like this discussion; I hope everyone involved remains objective in their
responses. I have no doubt whatsoever that Rich has seen what he claims,
yet his proposed physical process so far seems not to fully explain the
mechanism behind what he's seen. This is a common occurrence in my field,
where we often see events generated by unknown processes. Many theories are
proposed and Occam's Razor slowly whittles them down to those that are both
simplest and most plausible (this process does not always reduce the number
of candidates to one, however). I'm curious about what physical
mechanism(s) will result form this process.
Kim Elmore, N5OP
At 02:54 PM 2/4/2003 +0000, you wrote:
>2 wrote:
>>The grid wires in all of the shorted 3-500Z and 3-400Z tubes that I have
>>autopsied appear to be straight. I have never seen a bent grid. The bent
>>element is the thoriated-tungsten filament helix.
>>
>>>you will have to come up with another mechanism, one that can generate some
>>REAL
>>>force.
>>There is no doubt that real force did the bending because real force is
>>required to bend a bent filament straight. It typically takes 11-G for
>>c. 40-seconds, with the filament operating at c. 5.6V, to straighten the
>>filament.
>
>Fine - so where *did* the force come from that bent it? Eric has just
>shown that the EM force between two parallel wires is about 1/1000 of an
>ounce for the conditions he assumed (two 1in wires separated by 1mm, each
>carrying 10A). Even if you dispute the value of the current, you're still
>adrift by several orders of magnitude.
>
>>- Eric -- How do you explain:
>>1. the grid-filament short often seen in 3-500Zs often follows a big-bang?
>
>And just before the event, the grid and filament were already how close?
>Nobody knows, because only totally dead tubes are ever autopsied.
>
>>2. the simultaneous burnout of a grid choke made from 28ga Cu wire?
>That shows that considerable grid current had flowed - but nothing more.
>You still don't know whether the blown choke and the grid-filament short
>were both caused by the "main event" at the same time; or whether that
>event only caused the grid-filament short, which then blew the choke as a
>follow-on.
>
>Also there is conflicting evidence. On the one hand, enough grid current
>has flowed (somehow) to burn out the choke. On the other hand, it's not
>the grid that has bent - it's the filament.
>
>
>I'm sorry, but the evidence about this whole topic certainly does *not*
>"speak for itself"... at least, I can't hear the voices :-)
>
>We're back again to the limitations of autopsy evidence, and the need to
>sometimes return an Open Verdict.
>
>
>--
>73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
> Editor, 'The VHF/UHF DX Book'
>http://www.ifwtech.co.uk/g3sek
>_______________________________________________
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>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
Kim Elmore, Ph.D.
University of Oklahoma
Cooperative Institute for Mesoscale Meteorological Studies
"All of weather is divided into three parts: Yes, No, and Maybe. The
greatest of these is Maybe" The original Latin appears to be garbled.
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