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RE: AO-40 status report by DJ4ZC



Hi Richard,

I havn't worked the numbers, but ONCE I worked myself (when I was the only
land mass in the footprint), on AO-13 Mode S on a 16 turn G3RUH helix on
SSB, and it was S9. Given the increased power of AO-40 I'd say that a 16
turn helix is all you need. I'm receiving AO-40 with CRC ok 2m telem on an
M2 eggbeater at apogee, ... and the bird is still on the omnis.... once the
high gains come on I might only need the feedline <grin>.

I'm not a mechanical engineer, my 16 turn helix would make G3RUH groan if he
saw it, BUT it worked fine on AO-13. And its sitting here on the tripod
ready to start tests!

Cheers
Paul, VP9MU

-----Original Message-----
From: Richard@g3rwl.demon.co.uk
To: amsat-bb@AMSAT.Org
Sent: 11/22/00 3:17 PM
Subject: Re: [amsat-bb] AO-40 status report by DJ4ZC

Dumb question after reading the mail: 

> >The fact is that S-band works and works well according to the control
team.
> >So for those who have two meter reception problems, S band is
certainly a
> >good option and one that you certainly favor.
> 
> That's certainly true; once you allow steerable ground antennas,
> S-band emerges as the clear winner over both 2m and 70cm. It's just
> that this raises the newcomer's barrier somewhat compared to an omni
> antenna on 70cm, that's all.

Since they say the S-Band will be so strong, has anyone worked the
numbers 
to prove that directional antennas *are* needed there ?

73
Richard W L Limebear G3RWL
g3rwl@amsat.org
FOC # 1188

          So many beautiful girls ..... (sob) so little time
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