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[aprssig] Help with Interfacing a GPSto Kantronics KPC-3

Stephen H. Smith wa8lmf2 at aol.com
Wed Jan 3 21:16:59 UTC 2007

john.maetta at boeing.com wrote:
> Hi Bob,
> Thanks for the reply.  I have yet to hook a transmitter up to the KPC-3.
> So 'On the Air' testing has not been tried yet.
> I am trying to get the basics working first, then I'll interface the
> KPC-3 to my transceiver. What I wanted to see was the Xmit LED
> illuminate every 10 and 20 seconds to demonstrate that my system is
> working.  
> 73
> John N6VMO

The transmitting of raw NMEA strings over the air in routine APRS 
beacons is highly discouraged in California.  Raw NMEA strings occupy up 
to TEN times more air  time than the most compact encoding format for 
APRS (Mic-E);  a luxury we can ill-afford on the overloaded 144.39 
frequency in most of California.       Real-time off-the-air channel 
loading data for southern Cal is here:

    < http://webs.lanset.com/wa8lmf/uitraffic/trafficlive.htm >

If you want to run a transmit-only "dumb tracker" consider using a 
TinyTrack  < http://byonics.com > or Opentracker < 
http://n1vg.net/opentracker > instead.   Both these approx $35 kits 
transmit far shorter strings than an ordinary TNC in tracker mode and 
are smaller, lighter and consume less power than a full TNC.     Not to 
mention saving an expensive $200+ TNC for more elaborate 
transmit/receive applications at a home station.


Stephen H. Smith    wa8lmf (at) aol.com
EchoLink Node:      14400    [Think bottom of the 2M band]
Home Page:          http://wa8lmf.com  --OR--   http://wa8lmf.net

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