[TowerTalk] Is anyone using the 3 feedline approach on the C31XRfor SO2R?

[Dave Hachadorian]

----- Original Message ----- 
From: "Barry" <w2up at mindspring.com>
To: <towertalk at contesting.com>
Sent: Tuesday, June 05, 2007 6:45 AM
Subject: [TowerTalk] Is anyone using the 3 feedline approach
on the C31XRfor SO2R?


> Another C31XR question...
>
> Force 12 says you can use 3 feedlines on the C31XR for
> SO2R.  Does
> anyone actually use it this way.  Can sufficient
> attenuation
> realistically be obtained with elements in such close
> proximity?


I believe 5B4AGN is doing this successfully at 1500 watts.
Effective stubs and filters are absolutely required.
http://www.5b4agn.net/

His web site does not specifically say how the nine
feedlines from his three c-31xr's are handled, but I
remember from his previous postings that he had successfully
overcome the isolation issues feeding one antenna on two
bands for SO2R. Keep in mind that the bandpass filters need
to be bandswitched to follow the radios, but the stubs do
not need to be switched, since you have access to the three
individual feedlines.

Dave Hachadorian, K6LL
Yuma, AZ
































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