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Old March 24th 05, 05:41 PM
 
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Mark, You may have a point about the dipole being better, especially
for portable operation. I just want to experiment with the aluminum
poles I have. I may take your advice and use them to create a
portable tower in the long-run. But first I think I will try out the
vertical.


You could probably rig it up to do either, if the vertical
is stout enough to support a dipole/s. I have a couple of
drive on masts that I use with the fence rail masting.
Two of those makes 20 ft, and a good support for dipoles,
or other antennas. For industrial use, I have a tower and
beam I can drag around...I've drug it to the last four field
days...Wonder if I'm gonna make it five..?? It's a lot of
work for a two day deal....:/ I'm almost tempted to take a
field day vacation for a year...Have to see...MK

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Old March 25th 05, 03:22 PM
J. Mc Laughlin
 
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Dear "Asimov" w/o a call sign:

If you look closely, you will see that the "coiled up ribbon" is a
transmission line or a pair of transmission lines. By elevating the
antenna, which must be connected to the truck through at least one
transmission line, much improved transmission range is effected.

73 Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
Home:

"Asimov" wrote in message
...
" bravely wrote to "All" (24 Mar 05 09:41:39)
--- on the heady topic of " Loading Coil Q"

snip

Lately I've seen TV media trucks with a type of rather wide pole of
what seems to consist of a large coiled up ribbon. When they get to a
location they unfurl the tube and it raises the microwave antenna.
They seem to be made out of plastic or carbon, not sure. The one I saw
went up about 30 feet. It seems very lightweight in any case. Anyone
here know what it is?

A*s*i*m*o*v




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