[Xastir] A good time for APRS at 9600?

Guy Story kc5goi at gmail.com
Fri Nov 11 23:20:59 EST 2011


This  question comes up every so often.  I use to wonder the same thing years ago.  If memory serves me correctly, and I know this is not verbatim, WB4APR said that given the length of a posit in relation to the transmit time and the txdelay, 9600 does not really pay off.  The txdelay would eat up more time than the actual posit.  

I do need to quantify something.  APRS traffic that has any real length to it, say a weather report, messages, or long beacons, would benefit.  A backbone between digipeaters where multiple stations are in a packet would benefit too.

Sent from Guy's iPhone

On Nov 11, 2011, at 9:32 PM, "David A. Ranch" <xastir at trinnet.net> wrote:

> 
> This has been on my mind for a while now so I thought I'd throw it out there for at least an interesting discussion..
> 
> Here in the Bay Area, the 144.390 APRS frequency can get pretty congested.  We fortunately also have a lot of great high level Digis and Igates that eventually gets things out.  I imagine other metro areas are similar.  With understanding all that, I'm curious why 9600 baud APRS isn't more popular?  I know that 9600 packet is a lot more sensitive to tuning and with the lack of local Igates, that didn'r work out all that well but for APRS in the day in age of D700/710s, D7A/D72s, FT350s, VX8G/Rs, etc. with factory tuned TNC to radio interfaces/levels, sure seems like it would work.
> 
> Maybe there's something I'm missing but could it be the right time for 9600 baud APRS? 
> 73s
> --David
> KI6ZHD
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