Gee...turn it over and put the truss on the bottom. If it is wire,
change it to aluminum tubing like the HyGain 40-2CD. I have had a pair
of those up for close to 20 years and they have done very well.
K4TO
Bill Parry wrote:
> If you are talking about the Cushcraft XM240 and the C4XSL, I have had some
> experience with a very similar setup. I have had the XM240 and the C3E on a
> 120 foot tower for some time. I initially placed the 40 M beam about 13 feet
> above the C3E. I had severe interaction and the C3E worked poorly on 15 and
> the 40 M yagi was detuned considerably.
>
> I turned the C3E so that they were 90 degrees out of line and the problems
> seemed to go away for the most part. The 40 M beam was still detuned a
> little but still worked fine. I think that the setup you are describing will
> work fine. Remember, if you put the 40 on top there is a truss for the ends
> of the boom that needs to be attached three feet above the antenna. This
> will possibly reduce the amount of spacing you have available. (I am sure
> that you have already thought of this.)
>
> Good Luck,
>
> Bill, W5VX
>
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Gary Slagel
> Sent: Saturday, February 02, 2008 9:10 AM
> To: towertalk@contesting.com
> Subject: [TowerTalk] Interaction between yagis on the same mast
>
> I want to have gain antennas for 10/15/20/40 on top of
> my tower and am trying to decide between a 4 band
> antenna like the Force 12 C4XSL or a tribander and a
> separate 40m yagi on the same mast. Struggling with
> which is worse, interaction from having the 40M
> elements interlaced on the same yagi or interaction
> from having the two antennas stacked vertically.
>
> I'm leaning toward two separate antennas separated by
> about 10 feet and one oriented perpendicular to the
> other.
>
> Does anyone have any opinions?
>
> Thanks,
> Gary
>
>
> Gary Slagel/N0SXX
> Lakewood, CO
> http://marina.fortunecity.com/sanpedro/351
>
>
>
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