[amsat-bb] PSK31 Satellite Transponder works!

Tue Oct 20 15:43:50 UTC 2015

> When PSAT launched, the recommended PSK31 TX power was no more than 25W.
> Has that changed?

Yes, he web page now says 100 or what is needed to communicate...

Bob, WB4APR

-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Ted
Sent: Monday, October 19, 2015 7:13 PM
To: 'KO6TZ Bob'; amsat-bb at amsat.org
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!

When launched, the recommended TX power was no more than 25W. Has that
changed?

73, Ted
K7TRK

-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of KO6TZ Bob
Sent: Friday, October 16, 2015 12:04 PM
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!

Bob,

I was just on the 1820u 16Oct15 pass.  10m was high in noise, so the down
link was hard copy of my own signal.  I only saw one other Doppler
corrected station (vertical PSK signal) just before LOS. Could not display
the call sign.

A couple of hints to successful contacts:

1. Do not correct for Doppler by shifting the frequency on your 10m radio.
2. Use the Doppler PSK program, allow it to correct for Doppler by
shifting the PSK-31 frequency.
3. Update the TLE's in the Doppler PSK program (copy / paste) 4. Once you
are able to see your signal on the down link, NEVER stop sending until the
end of the pass.
    "Homestead" that frequency.  Just switch from CQ to the QSO sequences
for a contact.
5. Look for other stations somewhere in the VF pass band.
6. This procedure is different than working PSK-31 on HF.  So is the power
level.

BOB   KO6TZ

 > ON4HTI... will be participating in the... SCR,  > and we always do a
lot of PSK... on 10-15-20m

Don't forget to listen to the PSK31 downlink on PSAT (NO84).  Its FM
downlink is the audio copy of everything the satellite hears on the normal
28.120 MHz ten meter PSK31 terrestrial hangout.

And of course since the downlink (FM) adds no doppler, most signals come
in just fine and can be decoded by any PSK31 clients.

AND of course, being full duplex, it is fun to be transmitting to EVERYONE
in the passband at the same time you are seeing EVERYTHING everyone is
saying.

Try it...

http://aprs.org/psat.html

Bob, WB4aPR

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