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

[Ray Wells]

Stephen H. Smith wrote:
> 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.   
7036.0 LSB with 1600/1800Hz tones.
>
> [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". ]   
It's a long time since I tuned around 40m. My rig is occupied 24/7 on 
40m with the BBS (7035.33 USB with 2025/2225Hz tones)
>
>> 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.

That's Mother Nature for you, she's one smart cookie!

Ray vk2tv
>
>
>
> ------------------------------------------------------------------------
>
>
> --
>
> 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:
>
>