[SMCARA] Antenna Setup
Bill Jones
merc669 at gmail.com
Tue Nov 25 09:44:40 EST 2014
I was going to ask your #2 also since I have the end-fed to a post and
thought of just extending it by 100feet what the downside would be if
I barreled connected it and then sealed it with coax seal rather than
pull a new cable from the shack to the new antenna I was thinking of
to replace the end-fed next year.
Bill
On Tue, Nov 25, 2014 at 8:37 AM, Daniel Metcalf <kb3uun at gmail.com> wrote:
> Good Morning All,
>
> Just wanted to get some thoughts on a personal antenna installation that
> I have been considering. Please let me know what you think.
>
> Earlier this year I purchased a 160 sloper from Jim (KJ4WAS) but have
> not installed it yet for a couple reasons. First, I needed to get
> everything together to do the install and Secondly, I needed to wait for
> the leaves clear off of the tree that seems to be the best candidate for
> the installation. Lastly, having two back surgeries in a single year
> have limited my ability to get it done.
>
> A couple things have been ringing in my head as possible issues so when
> my launcher failed (line broke and I lost the weight on launch) last
> night I was not too heart broken.
>
> Possible Issues:
>
> 1) Between my house and the tree in which I would like to do the install
> is my vertical antenna and radial field. I have been considering the
> effects that could be caused by running the new feed-line either over or
> under the existing radial field.
>
> 2) The tree in which I would like to do the install is ~60ft tall and
> greater than 100ft from the house so I am seeing that I am going to need
> ~200ft of coax (which I already have) the thing that I have been
> considering is if I should leave the feed-line as one piece or put in an
> in-line adapter at the base of the tree.
>
> My current thinking is that Issue #1 is going to be the bigger issue. So
> much so that I might need to consider a different tree or would be
> inclined to move the vertical antenna to another part of the back yard.
> Which for anyone who has installed a vertical would know how much of a
> pain that would be especially with buried radials, coax and an 8ft
> galvanized pipe driven in the ground as the base.
>
> For Issue #2 I am thinking of just leaving the coax as a single piece to
> avoid any possibility of water getting into the connectors. The losses
> for the coax at 200ft is only ~0.66 db on 40m to ~1.76db at 6m based on
> JefaTech's Website and based on needing the full 200ft of LL400 so the
> distance is not that big of an issue.
>
> Any thoughts?
>
>
> Thanks,
> Dan Metcalf -- KB3UUN
>
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KC3DEZ
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