[aprssig] TWO-WAY trackers!

[Arno Verhoeven (PE1ICQ)]

> I agree, transmitting without listening isn't good amateur practice.
>   

Well if we start talking about decency, then I think that we should 
include output power in the discussion. I personally think that the 
TM-D700 and TM-D710 have a too big mouth. I believe that 6 to 10W is 
plenty for a tracker.

I also believe that in some circumstances it is perfectly OK to use a 
low power transmit-only tracker. After all, how many collisions do you 
really avoid with a tracker that listens for channel occupancy?
Sure, you will hear the digi, and nearby stations, but the digi itself 
will most likely hear a constant stream of data from lots of (distant) 
stations that your mobile tracker will not hear. So even you listen if 
the channel is free, chances are that you packets will still collide.
But a big mouth TM-D7x0 with 50W will solve that problem... right?

-- 
73, PE1ICQ  Arno Verhoeven