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Old October 31st 03, 04:07 AM
w4jle
 
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Current through a coil in an antenna.

If we feed an antenna at the current point, the current decreases as the
voltage increases along the antenna element from feed point to end..

That being said, a coil replacing a segment of an antenna (in order to
physically shorten it) will exhibit the same properties (relating to
currents) as the segment it replaced.



"Richard Clark" wrote in message
...
On 30 Oct 2003 22:59:26 GMT, oSaddam (Yuri Blanarovich)
wrote:

If we suppose the loading coil is heating up equally


Hi Yuri,

You have already testified twice that it does not - so why IF it
around?
1.)
If you trasmit for short period of time (not
enough for heat to equalize) and feel it, or use thermal strips to check
temperature, you would see the taper in the current from bottom to top.

It is
in order of 50%, not negligible.

2.)
Put 500W to it for longer period and watch the heatshrink tubing
shrivel from the bottom up.


73's
Richard Clark, KB7QHC



 
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