[amsat-bb] AO-85 & HT

Bob WB4SON at gmail.com
Mon May 30 18:29:16 UTC 2016

>From this post on the AMSAT.ORG website:  http://www.amsat.org/?p=4726

"Probably the most notable observations about AO-85 are an apparent lack of
sensitivity and difficulty in turning on the repeater with the 67 Hz CTCSS
when it is not yet activated, or holding it on by the presence of the
CTCSS.  We have determined a probable cause for the sensitivity issue and
while that can’t be fixed on AO-85 we are taking steps to prevent similar
issues on the rest of the Fox-1 CubeSats.  The tone detection threshold
along with the receive sensitivity issue makes it hard to bring up the

But like Bill said, you aren't wasting your time -- you will just find it
harder to work through AO-85 than SO-50.  Trying to work it with low power
and linear antennas when it is low on the horizon won't be a great return
on the time invested.

On the other hand, if you can't hear it then perhaps you have other RX
issues -- AO-85's TX signal is quite strong (the voice ID will be picked up
even without other activity).

73, Bob, WB4SON

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