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Old November 3rd 06, 12:48 AM posted to rec.radio.amateur.antenna
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Posts: 47
Default 10 meter mobile antenna


"Jimmie D" wrote in message
.. .

"Jerry" wrote in message
...

"Merlin-7 KI4ILB" wrote in message
. ..
Ok which one would you recommend?

http://www.mouser.com/search/Refine.... f&N=1323038+0

Thanks
joe



I've been able to mail order most any electrical part from Mouser. No
minimum order. And it puts you on the list for their huge catalog.

bob
k5qwg



vertical without having to cut it.

I did exactly this (20 years ago). I used a variable compression
trimmer
capacitor to check that I could actually get a low SWR, measured it,
and
fitted the nearest value disc ceramic (rated at 500VDC). I think it
was
330pF. No problems with 40W.
Ian.



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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Old November 5th 06, 12:14 AM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jul 2006
Posts: 172
Default 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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