>Bill:
>
> My explanation is quite simple, and believable. Like many other
>issues
>confronted here, the actual analysis requires crunching some real-world
>numbers. But I don't think it is an atomic physics issue.
>
> You are assuming a constant E-field in the tube, which is not a good
>assumption. At any contours, edges, or radii the electric field can grow
>considerably. This is basic electrostatics in operation. Just like the
>corona
>that happens at the end of antenna elements, where sharp edges occur, and is
>traditionally counteracted by increasing the radius of curvature (i.e.
>putting balls on the end).
>
> There are no doubt areas in the tube, possibly around the filament if
>it is a wound helix, which exactly fit the bill.
** Not quite exactly, Eric. The 3-500Z filament is a double-helix that
resembles DNA. The plural of helix is helices or helixes. The filament
is made from one piece of 3% thorium/ 97% tungsten wire.
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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