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10 meter mobile antenna
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November 5th 06, 12:14 AM posted to rec.radio.amateur.antenna
J. Mc Laughlin
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First recorded activity by RadioBanter: Jul 2006
Posts: 172
10 meter mobile antenna
I have seen large coil springs being made. One long steel rod is allowed to
roll down an incline from a hopper of rods. Each end of the rod is grasped
with an electrode and a large amount of current is sent through the rod. In
about 10 or 15 seconds, the rod becomes red hot. The soft rod is then wound
around a cylinder to form a coil. I do not remember what heat treating was
applied.
One could use such a procedure with the SS whip.
73 Mac N8TT
--
J. Mc Laughlin; Michigan U.S.A.
Home:
I once saw a 102" whip on a motor home that had literally been wound
into
a 4 " dia coil about half way up! It looked like one of those CB "big
coil" trucker antennas except it was all in one piece. I can only
surmise that he heated it and wound it around some sort of form. It
shortened the thing down to less that 5 feet. But, then, wouldn't that
take the temper out of the steel and make it flop over the next time it
was hit? There was also no evidence of heating, either; it looked like
it had been formed at the beginning of its life. Anybody ever see
anyone
do this before. If so, how was it done?
73
Jerry
--
Wouldnt be that hard to do, You can retemper the steel if it gets soft
and
the discoloring will buff off.
tempering metal takes some specific knowledge and experience. Ive done
it
to tools and had some success but I have also made them to brittle and
they break.
Of course it may have been one of those big coil antennas
Nope! I went over and looked at it from one foot away. One single CB whip
wound into about a 3-4" coil about halfway up. Looked pretty good, too. I
just don't know how he did it; never seen that done before.
73
Jerry
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