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Old April 2nd 06, 10:09 PM posted to rec.radio.amateur.antenna
Richard Clark
 
Posts: n/a
Default Current through coils

On Sun, 2 Apr 2006 16:00:16 -0400, "Yuri Blanarovich"
wrote:

I am sorry to beeing away for a zilion of posts, but real life is more
important and I am trying to be in touch. I will try to find the W8JI
response to my first (start from scratch) post in order to find where I went
wrong, if he will engage in some technical discussion. I hate to be wrong.


Didn't you start a new thread to clear out the cobwebs? That seems to
have gone the way of the dodo.


Hi Yuri,

Instead of chewing old gum over and over again, why not simply fulfill
a promise offered two years ago?

I hope it warms up, so I can get out, dig the car from the snow and do some
experimenting.

First experiment will be with 80m Hustler coil in order to use "standard"
(lousy) typical coil. I will paste LCD strip thermometers on the coil to
measure temperature changes at various positions, ends, middle.

Experiment #1:
I will drive DC current through the coil in order to generate heat and observe
the temperatures across the coil. I predict that thermometers will be tracking
each other very closely or be identical (ideal case).

Experiment #2:
I will insert the same coil in the Hustler mobile antenna, tune to resonance
and fire 100W to it. I will observe temperatures between the end and center and
between two ends. I expect difference indicating difference in current at
various points.

This will be the least disturbing measurement setup, no conductive nothing
disturbing the coil or antenna. I am assuming LCD thermometer is RF transparent
and I will verify that it does not detune the antenna/coil. Perhaps not very
accurate, but sufficient to demonstrate the debated differences.
The next measurements will be with current probes and RF ammeters. This will
give more accurate values.

Any problems with that?

Yuri, K3BU.us


No problems with that, but no results either.

73's
Richard Clark, KB7QHC