Re: [amsat-bb] Any sats with mixed polarity for 2M and 70cm?

["OZ1MY" <oz1my@xxxxxxxxx>]

Hi Freeman,
To get the most out of switching between RHCP and LHCP I would
advice you to have two switches.
If you look at FO-29 - on paper it says that both antennas are RHCP
- but in reality it depends upon the attitude of the satellite.
Sometimes I work FO-29 with opposite polarisation on 2 meters and 70 cm.

Even if AO-27 has linear antennas sometimes I get the best result with
opposite polarity on uplink and downlink.

Just my observations.

73 OZ1MY
Ib
----- Original Message ----- 
From: "Freeman P. Pascal IV" <pascal@pascal.org>
To: "amsat-bb" <amsat-bb@AMSAT.Org>
Sent: Saturday, October 16, 2004 7:07 AM
Subject: [amsat-bb] Any sats with mixed polarity for 2M and 70cm?


> I'm about to install my KLM 2M-14C and 435-18C tomorrow.  I have only
> one switch available in my manual station control network and I was
> thinking of wiring both relays to the same switch.  Does anyone know if
> there are any mixed polarity satellites in orbit where if I switch the
> downlink to LHCP I will suffer the 20db loss on the uplink due to it
> being the opposite polarity at the satellite?
> 
> Do I even need to worry about the uplink polarity?
> 
> 
> -Freeman, N5FPP
> ----
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