On Fri, 5 Apr 2002 12:34:38 EST K7LXC@aol.com writes:
> In a message dated 4/5/02 8:36:55 AM Pacific Standard Time,
> w5vx@hiline.net
> writes:
>
> > 1. I stacked a Cushcraft XM240 at 131' and Force 12 C3E at 120
> feet. I used the rule of thumb that the stacking distance should be at
least
> 1/2 the boom length of the higher frequency antenna. (C3E has a boom
of 18
> feet). This is not a good rule of thumb for these two antennas. Both
the XM240
> and the C3E were significantly detuned from the specifications. The
120'
> tower has non-conductive guys on the top three sets so that couldn't
have
> been the problem. We turned the C3E 90 degrees from the XM240 and both
> antennas play fine. Not my favorite idea but it works.
>
> Yes, I had the same problem with the XM240 and a TH11.
> Turning them 90 degrees made it WORSE so we tried to get
> distance between them - it helped.
>
> K7LXC
Did you (or anyone) try connecting the XM240 Reflector to the boom
(similar to the 402CD) ?
Did you (or anyone) try changing the termination on the XM240
feedline (short to open, open to short, change length) ?
Tom N4KG
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