Hi Bob,
I think you are new to the satellites, since I haven't heard you on the birds yet. Welcome to the fun world of sat's.
Now to your question. AO-27 is on a timer sequence, 20 seconds of digital - then 7 minutes of voice - then back to 1 full minute of digital - then off.
You may be hearing it switch back to digital mode at the end of the 7 minute repeater mode. Just my guess. There are a number of sites that give you the times for the daily passes. One of them, http://www.ao27.org/AO27/listing.shtml is currently about ten minutes off. (late) Another one you may want to check out is http://sites.google.com/site/ao27satellitescheduler/ a program you can download and use on the daily bases.
I hope this helps and we all will look for you in the future.
73, Rick WA4NVM
The last couple of passes that I have tried seemed to start well - I hear stations using the repeater - but then some sort of digital signal takes over and no other voice activity is heard. Is this some command work being done by the ground controllers?
Thanks
Bob, WA9JDR
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