[amsat-bb] FW: [FWD: RE: Southern CA Satellite Presentations]

Jim Walls jim at k6ccc.org
Tue Jun 28 16:48:00 UTC 2016


First, I said (in part):  

>> "If you're not using full duplex, you blindly
>> keep transmitting and creating interference for the rest of the users."  


Then skriostof at ... said (in part):  

> Not OK. If you're not using full duplex, you LISTEN to see if someone   

> answers your call. It is possible to successfully operate without 
 Not quite.  Repeating my situation of three people making a call after the 
previous conversation ends.
 You are operating full duplex:
 You start transmitting, and hear a hetrodyne, and stop transmitting within 
a second.  Another person successfully makes a call because the hetrodyne 
 You are not operating fulll duplex:
 You start transmitting and speak the callsign of the person you are 
calling followed by your own callsign before you unkey.  No one is heard 
because of the hetrodyne.
 Jim Walls

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