In a message dated 9/19/01 1:31:15 AM Pacific Daylight Time, K7GCO@aol.com
writes:
<< Another concept is to make it long enough to a "Create 160 Ohm" Rr
feedpoint and match it with 90 ohm coax. This improves the ratio of
Rr/RLoss
for the same radial system and that is always beneficial. (low feedpoint
currents) >>
Oops! That should read a 1/4 wave of 90 ohm coax to match 160 ohms to 50 ohms
for the rest of the way. I used only 1/4 wave of 90 ohm coax as that reached
right to the rig. So that actually was the only coax used and a 50 ohm
bridge read 1:1 SWR. K7GCO
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 100 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|