[amsat-bb] Re: metal or non metal cross booms
kl7uw at acsalaska.net
Sat Apr 5 22:58:56 PST 2008
A good decision that you made. A study by Kent, WA5VJB, shows that
only some sensitivity of position between elements on the antenna
boom impacts using a metal crossboom if the antenna is mounted in the
"X" confinguration. My satellite antennas are mounted this way.
73 Ed - KL7UW
At 05:50 PM 4/5/2008, Gopal Madhavan wrote:
>I have experimented with both non-metallic and metallic cross booms after
>reading numerous articles on the subject some years ago. With CP antennae
>mounted in X configuration there seems to be hardly any difference in
>performance. I speak of experiments done when AO-40 was active.
>I now use a metallic boom as it gives very good rigidity to mount two CP
>antennae, a small dish for 2.4 GHz, preamps etc. Here in India I do not have
>the option to order a good section of fibre glass cross boom any way, and so
>had made do with PVC tube wrapped in fibre glass, but it eventually sagged
>and I had to periodically rotate it 180 degrees to keep it somewhat level.
>Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
>Not an AMSAT-NA member? Join now to support the amateur satellite program!
>Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB