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'[OT] HOT ANTENNA'
1999\05\04@110844 by Wagner Lipnharski

picon face
I apologize for the bandwidth, but...
Searching help from the radio amateurs colleagues:

I need to produce a hot rod, 3 inches long, 1 mm diameter (this is the
killer), vertical or horizontal mounting, solid material as copper -
brass - steel - ceramic - etc., to achieve aprox 300-400¡C, mechanical
mounting at one side (tip and 3 inches free in the air). Temperature
should be uniform all along the 3".  After several failures using lots
of crazy ideas (since just the rod should be heated, not the rod
mounting base), I thought about radio frequency heating.  What happens
if an antenna is made of resistive wire? with or without wavelength
match, applying high power RF to this "dipole" (or monopole since just
one rod would be used) the antenna element would heat?  There is nothing
close to the rod for more than 4 ft, except for the mounting base.

As this subject doesn't interest the list at all, please email me
directly.
Thank you and regards,

Wagner.

1999\05\04@162250 by wwl

picon face
On Tue, 4 May 1999 11:08:19 -0400, you wrote:

>I apologize for the bandwidth, but...
>Searching help from the radio amateurs colleagues:
>
>I need to produce a hot rod, 3 inches long, 1 mm diameter (this is the
>killer), vertical or horizontal mounting, solid material as copper -
>brass - steel - ceramic - etc., to achieve aprox 300-400¡C, mechanical
>mounting at one side (tip and 3 inches free in the air). Temperature
>should be uniform all along the 3".  After several failures using lots
>of crazy ideas (since just the rod should be heated, not the rod
>mounting base), I thought about radio frequency heating.  What happens
>if an antenna is made of resistive wire? with or without wavelength
>match, applying high power RF to this "dipole" (or monopole since just
>one rod would be used) the antenna element would heat?  There is nothing
>close to the rod for more than 4 ft, except for the mounting base.
>
>As this subject doesn't interest the list at all, please email me
>directly.
>Thank you and regards,
>
>Wagner.
Ceramic tube with 'V' of resistance wire inside.
Use a semi-circular section, and bend or join the end so your 'rod' is
actually two conductors, joined at the tip.

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