[amsat-bb] AO-85 Uplink

Paul Stoetzer n8hm at arrl.net
Mon Dec 7 20:31:28 UTC 2015

At AOS, you should be around 160 and then tune up in 5 kHz increments as
needed to 180 at LOS. That has worked the best for me. If you are computer
controlled, then set your center frequency to 435.172 MHz.

Uplink polarity makes a massive difference as well. If you're fixed
vertical or horizonal polarity, you'll find times when you cannot access
the satellite.

200W EIRP is the recommendation for full quieting horizon to horizon, but
remember that trees cause losses on 70cm, so you may have to increase your
uplink power to get through trees or compensate for polarity.


Paul, N8HM

On Mon, Dec 7, 2015 at 3:26 PM, Greg <gjd1958 at verizon.net> wrote:

> Having a little trouble getting into the bird.  I noted that the uplink is
> 435.180 with a 67.0 tone.  However, I read that due to temperature
> variations the uplink is closer to 435.172.  Tried the 180 w/out luck.
>  Any suggestions on the successful uplink frequency?  Tested the 435
> antenna on receive and having no problem hearing in that band, so I am
> assuming I am missing the bird frequency on my uplink.
> Thanks
> Greg
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

More information about the AMSAT-BB mailing list