[Amps] 4-400A Plate

[Bill Fuqua]

Sure this is not Alex again.. "mark" <mark@sandlabs.com>
73
Bill wa4lav


At 11:07 AM 11/11/2002 -0500, mark wrote:
>I dought very much that the Anode is made of pure Tantalum, as this
>materiakl is veri brittle in this form.
>Also VERY expensive :)
>For more about Tantalum go to :
>http://www.tanb.org/
>
>Most of the Tatalum today, (99%) is used in the fabrication of high
>capacity, small form factor capacitors.
>Pure tantlaum sells for about 125 usd an lb in ingot or cap grade powder.
>
>A pure Tantalum Anode to resist the "white hot" temperature (a bit under
>2996 deg. C) should cost around
>$1000 :)
>
>Mark
>
>----- Original Message -----
>From: "Peter Chadwick" <Peter.Chadwick@zarlink.com>
>To: "amps" <amps@contesting.com>; "'Bill Fuqua'" <wlfuqu00@uky.edu>;
>"'mark'" <mark@sandlabs.com>
>Sent: Monday, November 11, 2002 10:24 AM
>Subject: RE: [Amps] 4-400A Plate
>
>
> > Mark said:
> >
> > >What is the use of the "glow" ??? Just wated energy :)
> >
> > In the case of a tantalum anode tube, the glow means that the plate is hot
> > enough to absorb gas - a few metals have this property - so tantalum anode
>tubes
> > are meant to be run so hot.
> >
> > In any case, there's no more waste of energy than in a tube running at the
>same
> > efficiency and RF output with no glow.
> >
> > 73
> >
> > Peter G3RZP
>
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