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Re: [VHFcontesting] coax for 50 and 144 questions

To: vhfcontesting@contesting.com
Subject: Re: [VHFcontesting] coax for 50 and 144 questions
From: STeve Andre' <andres@msu.edu>
Date: Sun, 9 Jul 2006 03:21:34 -0400
List-post: <mailto:vhfcontesting@contesting.com>
On Sunday 09 July 2006 01:35, David Ashworth wrote:
>  Hi to all, thank you for the answers to my previous questions about
> stacking and rotors.  I learned a lot.  Now, a couple of questions and
> wonder what you are using that works.  Here is the statement and the
> questions:  Have some 9913 that feeds a multi-band vertical for 5 years or
> more.  Heard that it may suck up water, no troubles yet.  Now, we write a
> clean slate. Say I would like to put up beams on a new mast for 50 and 144.
> What coax would the group recommend?  I am curious, I have heard about this
> LMR-400, etc,  but have not seen any of it.  If it is like 9913, it would
> not like to turn around and around.   What connector from the high dollar
> run (LMR)  to the pigtail coax that likes motion would you advise? What
> type of coax would you use for the pig tail?  Just full of questions.  The
> run would be 100'. Thank you much for your assistance, Dave, NC6P.

I really like 9913F7.  It isn't air filled like 9913, so water isn't going to
run down inside. 

However, you can also find *great* deals on Andrew LDF4-50 and
sometimes, LDF5-50.  The 1/4" LDF4-50 loses about .8dB per 100
feet, and LDF5-50 about .45dB per 100 feet on 2M.  If you look
around you can sometimes find 4-50 for $1/foot, and 5-50 for $2
a foot.  Granted  you have to scrounge, but new Heliax at this
prices are possible; I've done it three times now.  The connectors
are harder to find, but at Dayton this year there were 4-50 N
connectors in the $10 range.

The loss at 2M for 9913F7 isn't bad, but if you start climbing up
the bands you'll appreciate Heliax more.

--STeve Andre'
wb8wsf  en82
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