[amsat-bb] Re: AO-51 downlink power ?

Andrew Glasbrenner glasbrenner at mindspring.com
Mon Jun 18 07:24:10 PDT 2007

The command team has been adjusting the power output on the two downlink transmitters to match the changing eclipse times and the changing loads. The 435.300 transmitter tripped on a low voltage watchdog yesterday, but was restored halfway through the 1st pass over the eastern US. Ocasionally during the lead up to Field Day, the L/U downlink on 435.150 may be briefly switched to data to allow the command team to check telemetry.

We were actually running 770 milliwatts for Kids Day, which is almost twice the normal output, so you should not have had any issues hearing the satellite. How are you hearing the other satellites with 435 downlinks? 

73, Drew KO4MA

-----Original Message-----
>From: John Price <n4qwf1 at gmail.com>
>Sent: Jun 18, 2007 9:00 AM
>To: AMSAT-BB <AMSAT-BB at amsat.org>
>Subject: [amsat-bb]  AO-51 downlink power ?
>Has the transmitter been set to lower power output? I worked the
>satellite with the handheld and the arrow last week and this week I
>can't seem to access it with my AO-13 class station. Signals are very
>weak here. Everything seems to be working fine as I just worked AO-07
>mode U/v with a 5.7 report from K3SZH and he was as good back to me.
>Also worked KD8SY on the same pass. Good signal as well. Anyone know
>what might be going on?
>73's << John
>N4QWF Amateur Radio Operator
>Internet N4QWF at AMSAT.ORG
>Formerly KC4AHW  VK3FEZ
>Amsat Member #27845
>DXCC #33,478
>VUCC SAT #135
>WAS SAT #296
>51 on 51 #13
>LON -79.25 LAT 37.45 Grid FM07
>>From the Foothills of the Blueridge
>Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
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