Why not keep the ladder line all the way into the shack and put a tuner on
it to conveniently cover the bands of interest. To run the open wire into
the shack (like go through walls or windows, etc.), use some equal length,
short runs of coax, and connect two coax lines in parallel, center
conductors connected to the openwire, then direct into the tuner - ground
the braids together of the two parallel lines.
Stay away from the baluns - creates loss.
OR, Consider a simple 3 element tribander pointed south (30 or 40 ft. high)
and an inverted vee for 40 M on that tower - either a relay on the tower to
one feedline (coax) or two feed lines. Don't think you will benefit much
with a wire on 10 or 15 and still be competitve to the south.
Regards,
Mark, K1RX
GALE STEWARD <k3nd@yahoo.com>@contesting.com on 08/20/2001 03:33:11 PM
Sent by: owner-towertalk@contesting.com
To: towertalk reflector <towertalk@contesting.com>
cc:
Subject: [TowerTalk] Ladder Line and Coax
Have been thinking of installing a simple antenna to
cover the SE in contests and as a backup in general.
Was considering a inverted vee hung from the tower and
fed with ladder line & tuner. I want to cover only 10
thru 40. My question is this: my tower is about 100
ft ftom the house and want to feed this antenna with
ladder line near the ground, how do I handle that
transition to coax? A 4:1 balun, a 9:1 balun, other?
Is it even worth doing with the losses incurred due to
the mismatch in 100 ft of coax? Maybe a trap dipole
or inverted vee would be more appropriate? I just
wondered if anyone had tried something similiar and
how it all worked out.
73, Stew K3ND
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