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

[Jim Walls]

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 
full-duplex. 
  
 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 
ends.
  
 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
 K6CCC