[aprssig] New Writeup On HF APRS Posted To My Website

[Stephen H. Smith]

Ray Wells wrote:
> Stephen,
>
> Good information.
>
> Like Canada, Australia also has a vast interior with no VHF 
> infrastructure. A not insignificant percentage of our major highways 
> also have no VHF infrastructure, resulting in substantial use of HF, 
> principally on 30m, but there is now also a 40m frequency receiving a 
> bit of attention and success. 

What frequency are you using on 40?   I'll add it to the write up.  Who 
knows -- with the impending re-alignment of 40 meters to move 
international broadcast out of the ham band, we may start being able to 
actually hear something on 40 at night.   

[Currently, the  entire upper half of the 40M band in most of North 
America at night is a howling mess of  S9+20  heterodyning  carriers 
and  sideband splatter from dozens of megawatt shortwave stations in 
Europe, the Middle East and South America , rendering it totally 
unusable by hams.   Don't know if you hear anything remotely like this 
"down under". ]   

> The latter emerged as a result of one licence class not being 
> permitted to use 30m.
> Given the large number of HF Igates around the world, one could almost 
> argue against the need for WIDE2-1 in a HF beacon.

Not almost.    TOTALLY argue against......

> I regularly (almost daily) have two US stations in my heard list and I 
> was gating a /MM station in the Caribbean a couple of years back. This 
> morning I see WB9OTW, VE4GLS and EA8ADH-9 on my 30m port. I'm on the 
> east coast of Australian between Sydney and Brisbane.
>

Good God!!   I regularly see VE4GLS on my 30M APRS map at:

     <http://wa8lmf.dyndns.org:14439>   

monitored off-the-air  in Los Angeles, but I had no idea he was getting 
clear across the Pacific.  I wonder how many KW he is using and what 
kind of miracle antenna he has???

I'm amazed you are hearing these stations that have a long (presumabley 
lossy) path over the North American landmass before they even reach the 
Pacific, rather than stations on the California coast and Vancouver, B.C.



------------------------------------------------------------------------


--

Stephen H. Smith    wa8lmf (at) aol.com
EchoLink Node:      WA8LMF  or 14400    [Think bottom of the 2M band]
Skype:        WA8LMF
Home Page:          http://wa8lmf.net

NEW!  HF APRS Notes & Guide
  http://wa8lmf.net/aprs/HF_APRS_Notes.htm

"APRS 101"  Explanation of APRS Path Selection & Digipeating
  http://wa8lmf.net/DigiPaths

Updated "Rev H" APRS            http://wa8lmf.net/aprs
Symbols Set for UI-View,
UIpoint and APRSplus:


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