Re: [amsat-bb] AO51 APRS digipeat

[<gouldsmi@xxxxxxxxxxxxx>]

HI Paul,

I found the best method while testing this mode was to use the TlmECHO telemetry program to copy the downlink.  I have a 50% to 75% success rate on getting a digipeat depending upon activity and the pass.

My uplink was a D700A running 10W into a J-pole.  Downlink is an 8 element yagi, pre-amp, fixed 25 deg elevation and azimuth tracking via FT-847 into modem then TlmECHO.
Downlink is only 290 mW, so a very good receive system and S/N is needed.

I will be doing some more testing, but haven't been very successful using my TH-D7A and Arrow to copy packets.
I suggest using TlmECHO to get a feel for what you will see and how often then experiment to see what you can copy with other equipment.

Here is some text from the TlmECHO output from a US pass this morning.

My UNPROTO was  ALL via PACB-1


PECHO-60  > WA4AEJ-11:�`­C 
12/24/05 9:52:46 AM
PECHO-11  > QST-1    :<BBS Broadcast> 
12/24/05 9:52:46 AM
PECHO-11  > QST-1    :<BBS Broadcast> 
12/24/05 9:52:47 AM
PECHO-11  > KX4Y-0   :OK KX4Y 
12/24/05 9:52:47 AM
PECHO-11  > QST-1    :<BBS Broadcast> 
12/24/05 9:52:47 AM
PECHO-11  > QST-1    :<BBS Broadcast> 
12/24/05 9:52:47 AM
PECHO-11  > QST-1    :<BBS Broadcast> 
12/24/05 9:52:47 AM
WA4SXM-11 > ALL-48   :��@@ãðDigi   Season's Greetings from WA4SXM via AO-51 
12/24/05 9:52:47 AM

73,
Gould, WA4SXM
> 
> From: "Paul Luggar" <luggsey@hotmail.com>
> Date: 2005/12/24 Sat AM 09:31:59 EST
> To: <amsat-bb@amsat.org>
> Subject: [amsat-bb] AO51 APRS digipeat
> 
> Hi all, Merry Christmas and a happy New Year to all!
> 
> Can anyone tell me why I don't hear my/anyones beacons on AO51?
> 145.860 Up
> 435.150 Down (+/- Doppler)
> Callsign PACB-1
> AEA 2232 set to modem 18 9600 baud fulldup on.
> IC 910 set to 9600
> I had to set the AFSK pot on the 2232 to allow the 910 to TX, it's fussy about
> the signal level, but this now seems ok.
> Am I on the wrong track?
> I thought that APRS beacons would be digipeated?
> 
> Paul Luggar
> 
> Amsat-UK  member 6484
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