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KG6BAJ > NWSGRP 28.09.09 22:44l 37 Lines 1199 Bytes #999 (0) @ WW
BID : 12040_N1OES
Read: GUEST
Subj: Open wire feedline
Path: DB0FHN<DB0MRW<DB0ERF<OK0NHD<OK0PHL<OK0PCC<OK0NAG<OK0PPL<DB0RES<DK0WUE<
7M3TJZ<CX2SA<N6RME<KG6BAJ<KG6BAJ
Sent: 090928/1200Z @:KG6BAJ.#NCA.CA.USA.NOAM #:12040 [Grass Valley] InterGate $
** NEWSGROUP: rec.radio.amateur.antenna
** FROM : Ron Walters <w4lde@numail.org>
I am feeding a 80 meter center feed with open wire, about 100ft feed-line.
Due to some new construction work that is going to start on the back of
our home this week I am forced to move the feed-line.
The original installation had about 50 ft vertical from the center of
the dipole and then across and under a raised wood porch and then up to
a second floor shack.
The porch is going and a new covered screened porch is replacing it.
I have three choices during construction, they are:
1. Leave the 100' feed-line coiled out in the yard and not operate.
(Not a great idea)
2. Cut the feed line down to around 50' which would be temporary but
then I would have to splice it later after construction.
3. Coil about 40' near the 4:1 balun, however I am concerned that the
coiled feed line will act a one big inductor and change and or
significantly reduce the antenna efficiency.
#3 is the easiest but I am worried about open wire feed-line coiled,
thoughts please!
73 de
Ron W4LDE
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