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Re: X or +



Hi Bert,

I didn't drill any more holes in the 70cm antenna boom.  I used a square
aluminum plate and four U-bolts the same way the KLM 2M antenna is
mounted.  Two U-bolts around the EL boom through the plate and two U-bolts
around the antenna boom through the plate.  The EL boom on top of the plate
and the antenna boom beneath it.  This allows you to rotate the antenna
boom on its axis to any position and additionally strengthens the mounting
to avoid skewing and slipping of the antenna position.

Bert McClellan wrote:
> 
> I found the comments on mounting the sat antennas as a X or
> +  interesting.  I used the Hi Gain sat antennas for about
> 7-8 years with good luck. They were mounted as a X. When
> they started going bad I changed to KLM, for one reason they
> were made about 10 miles from where I live. The KLM antennas
> are mounted as a  +.  Always looking for a better mouse
> trap, I thought I would try changing to a X mount.
> 
> The manual on each antenna shows the + mount. I found that
> to change to a X mount I would have to drill new holes in
> the 435-40CX antenna as the mounting holes are pre drilled
> for a + mount.
> 
> I found on the 2M-22CM antenna I would have to move the
> antenna aprox.. 6 inches back as at the balance point has a
> element  in line with the fiberglass boom. (This is most
> likely because I have the coax running down the antenna and
> do not  have the heavy weight of the coax hanging off the
> back.) This would throw the balance off unless I installed a
> counter weight on the front end.
> 
> On another subject of having the coax hang off the back as
> almost all pictures show ( KLM also says to hang it off the
> back) I also do as Roy mentioned about routing it down the
> boom and the antenna. After a couple years of repairing
> cables that caught on things, I tried running it down the
> boom and antenna and have found nothing wrong with it. In
> fact once in a while the antenna will go past 90 degree and
> no more fouled cables.
> 
> I really would like to talk to KLM about the mounting, but
> as you know they are no longer in business and I do not know
> if Bruce and Bob are still ion  the area.
> 
> I am not a antenna specialist and definitely do not want to
> start anything. Just another comment.
> 
> Bert    N7TKO    Gold Bar, WA
> 
> Amsat 24279
> 
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-- 
73, Roy

Internet: w0sl@amsat.org
Home Page: http://home.swbell.net/rdwelch
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