As I said in my closing remark in an earlier post:
"I realize that we'd like to eak out every dB we can, but in the end, it
makes little to no difference on HF."
If one can match the load, using what ever means and equipment, then energy
will be transferred. On receiving, atomospheric and man made noise will
overtake any losses in the antenna system and will over ride most all
receiver noise.
73
Bob, K4TAX
----- Original Message -----
From: "Stuart Rohre" <rohre@arlut.utexas.edu>
To: <tentec@contesting.com>
Sent: Friday, August 02, 2013 2:56 PM
Subject: Re: [TenTec] OT: Openwire/Window Line and Bad Wx
Actual parallel line experience: One Field Day we arrived at our usual
site to put up a 300 foot around horizontal loop. We usually corner fed
the Delta shaped loop at a corner with 450 ohm line we keep in Field Day
stocks. About 50 feet at most was our usual feed, but we had a big wooden
spool of various parallel ladder line lengths 450 and 300 ohms.
There had been and continued to be off and on, huge rains. We could not
set up the tent on the ground that was flooded. The closest paved area
was over 200 feet away. We tied off ladder line to trees and spliced more
in with wire nuts, and even added in a stock of 300 ohm ladder line, until
we reached the new location of the tent. The Dentron Super Tuner as
always with that loop; was hooked up with a 4:1 balun external to the
Tuner. Static discharge resistors of 150 k ohms went to a ground rod from
each conductor right at the balun balanced side.
We found that the Tuner had no trouble matching the mixed up combination
of differing impedance ladder lines, nor did we detect any signal losses
compared to the usual shorter ladder line feed.
-Stuart
K5KVH
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