Hello all; I thought I would throw this annoying little problem out to the
group and see if anyone has any suggestions. First a description of the
system: this is a 4 hi stack of M2 7 el 10 mtr yagis 7/7/7/7 @
140/105/70/35 fed with equal lengths (80 ft) of RG 213 to a WX0B
Stackmaster then LMR600 to the shack. Top rotates 360 deg and bottom 3
rotate 300 deg on swing arms. The problem is the same regardless of
direction any or all are pointed. The problem: swr on all individual
antennas is a perfect 1:1; swr is 1:1 on any combination of 3 antennas; but,
any combination of 2 antennas or all 4 results in a swr of 2.3:1. I have
swapped out all the StackMaster controls and added an extra 6 feet to each
feedline as possible fixes but had no effect. The tower is Rohn 25 guyed 3
ways 4 times. The antennas are mounted just above each guy point which gave
plenty of rotating room. Any ideas or solutions? Thanks and 73's Cort
Courtney Judd K4WI / NA4W
2300 County Road 61
Uniontown, Al. 36786
Check out my web site:
http://home.earthlink.net/~k4wi/k4wi/
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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