[aprssig] TWO-WAY trackers!
Brian B. Riley
brianbr at mac.com
Tue Sep 25 13:08:36 CDT 2007
Thats easy to say when you live in Europe where a long afternoon's
drive could easily cover three or four countries and a bunch of
digis... but here in the US we have places where an afternoon's drive
won't even cross one state and digis are sometimes farther apart than
you countries are wide ... 50 watts then can be highly appropriate.
You are focusing on the wrong evil, it's not the equipment, it's the
operator. The TMD7x0 has three power settings (5 , 25, 50) and they
are the choice of the operator. Education, not prohibition is the
cheers ... 73 de brian riley, n1bq , underhill center, vermont
<http://web.mac.com/brianbr/> Tech Blog
Home of the
K107 Serial LCD Controller Kit FT817 Power Conditioner Kit
Tab Robot Laser Tag Kit MSP430 Chips and Connectors
Propeller Robot Controller SX48 "Tech Board" Kit
PICAXE chips and accesspries Freeduino systems
On Sep 22, 2007, at 1:52 PM, Arno Verhoeven (PE1ICQ) wrote:
>> 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?
More information about the aprssig