[amsat-bb] New M2 LEO Antenna System

[Alan]

Jeff,

I had precisely the same arrangement with no problems for 20+ years.  When something did slip, I reset
it, and tightened the bolts another 5 inch-lbs.  Eventually nothing slipped.

It did come down one night, but due to a gust of hurricane force winds and an unseen rusted bracket
which brought down the entire tower in about 5 seconds.

73s,

Alan
WA4SCA


<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of kb2m at arrl.net
<Sent: Monday, March 09, 2015 4:12 PM
<To: amsat-bb at amsat.org
<Subject: Re: [amsat-bb] New M2 LEO Antenna System
<
< I would not worry about wind loading, or weight with the yagi's John. When
<you have a need to put a 1+ meter dish on your cross boom, then you will
<worry about wind load. My last property in SNJ overlooking a 200 acre field
<near the ocean had some very windy conditions and it would catch the dish
<and move me off azimuth on several occasions. I thought it better to have a
<little give in the system rather than thru bolt everything. Much easier on
<the rotor system at 50+ MPH winds.
< I had my large KLM's plus a 55 L 1.2gig loop yagi, along with the 1 meter
<dish for almost 15 years with no issues...
<
<73 Jeff kb2m
<
<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of John Becker
<Sent: Monday, March 09, 2015 11:24 AM
<To: amsat-bb at amsat.org
<Subject: Re: [amsat-bb] New M2 LEO Antenna System
<
<
<
<On 3/9/2015 9:25 AM, Bruce wrote:
<> i have had the m2 11x2 2m circular and 15x2 70cm circular big antennas
<> since 1993 and they have been great. however, this new antenna is even
<> better as they are mounted by the end instead of the center of the
<> boom. that means there should be almost zero clearance needed between
<> the bottom of your rotor and the ground or a roof. although not
<> ao-10/13 or ao-40 class antennas, there is no need for that much gain
<> or directionality. just ordered one of these antennas and the
<> crossboom is part of the kit. what could be better... well, they could
<> come install them for me.
<
<Hard to do with the larger antennas due to weight load on a rotor.
<I did think about it but with the 22 element 2 meter and 44element UHF was
<just to much weight hanging on the rotor. Not to mention any wind load.
<We here is Missouri do get very strong winds at times.
<
<John, W0JAB
<
<
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<_______________________________________________
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<to all interested persons worldwide without requiring membership. Opinions expressed
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