[TowerTalk] Simpler Version of Shunt Fed Tower - 80M?
howk2 at hotmail.com
Sat Feb 4 21:28:18 EST 2006
Jerry and Brian,
I have an 80ft self supporting tower with two 4 el SteppIR's. I shunt feed
it for 80 and 160 using two separate feeds. Both circuits are gamma matches
with vacuum varariable capacitors. The gamma lines are 3/4 inch copper pipe
with pvc standoffs. I retract the elements whenever I am on 80 and 160. I
have been doing this for almost 3 years without (my fingers are crossed) a
problem. I believe Brian had some concern about the cost of the caps. There
are good buys on E-Bay as well as some not so good. You have to keep
looking. I paid under $100 for each.
--Original Message Follows----
From: "K4SAV" <RadioIR at charter.net>
To: <towertalk at contesting.com>
Subject: Re: [TowerTalk] Simpler Version of Shunt Fed Tower - 80M?
Date: Sat, 4 Feb 2006 21:02:23 -0500
Now, having said all that, I know that some have tried this. Maybe
those guinea pigs will offer their results. I would like to know anyone
experienced any of the problems listed above.
Brian Maynard wrote:
>This is a question for the group. Thanks for reading and responding
>as you can. Brian, K1NW
>I have a USTowers 55' crank up with a 4-L SteppIR. I would like to
>put up a shunt fed wire for 80M only. I have read up on this and
>despite it being called a "poor-man's vertical" I find the ~$400+
>price tag for vacuum variable capacitors to be very prohibitive.
>My question is:
>If I am only looking for resonance on 80M can I just use high power
>capacitors (recommendations welcome) and skip the vacuum variables?
>Also I am using the standoffs for my feed and control lines, and
>could not possibly tie the cables for these to the tower legs (I
>raise and lower the tower regularly) - how will this affect
>performance of the 80M wire?
>TowerTalk mailing list
>TowerTalk at contesting.com
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