[amsat-bb] non-doppler correction on linear sats

[k6vug at sbcglobal.net]

Hans,
The funny thing is that if both stations don't auto-correct for doppler they can stay in QSO for much longer since both will "walk" the satellite's pass band.  I guess this is how it worked in the good old days.  
 
So, when I faced this situation, I would tune to the calling station then turn OFF my auto-correction and adjust only the uplink slightly to hear myself when transmitting.  It worked in most cases.  If the calling station puts out a very short CQ, like in FM sats, just TX and ask them to do a longer call.  
 
 
GL es 73! 
Umesh, k6vug 
 
 
   On Thursday, May 9, 2019, 1:08:16 AM PDT, Hans BX2ABT via AMSAT-BB <amsat-bb at amsat.org> wrote:  
 
 How to deal with signals (CW/SSB) where the other party doesn't seem to 
do doppler correction? I use an Airspy/IC820H combo to receive (2m) and 
transmit (70cm) and both are controlled by Gpredict so that uplink and 
downlink on linear sats stay in tune. However, I hear many stations that 
apparently don't do this and their signals "walk" up very fast, right 
out of my passband. Difficult to get their call, let alone have a QSO. 
So what should be my strategy to deal with this?

73 de Hans

BX2ABT