Dear Wayne (no call sign given): The use of "it" causes an ambiguity. If
the antenna tuner is "at" the antenna feed point, then 25 feet of RG-58
running to the shack will contribute very little to the overall loss of the
system.

A colleague has had success with an insulated wire on his roof fed in the
middle with an auto-tuner. The coax from the tuner has several type 31
chokes to kill common mode and the coax itself contributes very little to
the performance of the system.

On the other hand, such a short antenna as you are using (on the lower
bands) fed with RG-58 from a tuner in the shack is expected to have
significant losses. If this is the case, moving the tuner outside should be
tried.

73, Mac N8TT

"Wayne" wrote in message ...

I am using a whip antenna mounted on a metal patio cover. Results are good
on 10 and 12 meters, and contacts have been made down to 40 meters.
(Matches were not obtained on 15 or 30 meters) The whip is 8.5 ft long (a
longer whip is under consideration). It is fed through an antenna tuner and
about 25 feet of RG-58. I'm about to replace that with RG-8.

Any comments on how to hold down feedline losses. One suggestion is to use
two parallel lengths of RG-8 so that half the current runs through each.
Also, site geometry would allow open wire feed.

Possibilities?


J. C. Mc Laughlin
Michigan U.S.A.
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