[OZAPRS] Contest SSB

[Ray Wells]

Hello Philip and all,

Your posting has had me thinking and it raises a few questions.

I've been running a 40m BBS on 7035.8 for some time. Daytime BBS traffic 
can be quite intense with forwarding to two other BBS's, plus user 
activity. Since I use USB I'm wondering if I'm causing any problems due 
to proximity to your aprs frequency. My two tones would fall on 7037.4 
and 7037.6. I run about 35W to a dipole that is end-on to you guys, and 
is mounted high enough that it would be starting to be directional. 
Probably of more concern is if the VK guys on aprs are "hearing" me as a 
problem, because the antenna favours NNE/SSW, looking at VK4, VK3 and 
eastern VK2.

I used to operate a bit lower but I received a request from some VK4 to 
move because I was clobbering their week signal work into Europe. I 
obliged by shifting the crystal as high as it would go.

Looking at band plans, 7.030 to 7.040 is for data/packet according to 
the WIA plan. I see that ZL is currently the same but there is a 
proposal to move to 7.050 to 7.070 (I wish them luck shifting an 
established aprs net!).

The Region 1 band plan differs from Region 3, hence the clash with the 
VK4's.

If I am observed to be causing problems I am prepared to purchase 
another crystal and move a tad higher  (7038 would place my high tone 
200Hz inside the top end of the data/packet segment) and being USB it 
would steer well clear of aprs using LSB on 7036. All other station have 
frequency agility so a move by me would not present a problem.

BTW, my current crystal will not shift that far. It's a commercial spec 
crystal operating to commercial spec in a commercial rig.

I await comment from Philip and the VK guys using 7.036.

Ray vk2tv

Phillip wrote:
> Hi, 
> I have been listening around of late to find out why many data stations are
> not being copied, both in NZ and in VK 
> I have come to the conclusion that there are not enough HF data stations in
> the given band segments. 
>  
> This morning I heard YT8A working contest phone 7036.5 at times 5 / 9 + 10 @
> 7.30 NZT also VK9LA was running hot 
> on 7.030.00, F5BZB on 7035.2 with splatter up to 7037.0 
>  
> While these segments are allocated by gentleman's agreements ( they are here
> in NZ as recommended usage by NZART ) 
> if we don't populate these sections they will be over run with SSB phone. VK
> have similar plans to ours 
>  
> Either we place more stations in these sections or we increase our beacon
> times to at least show some presents in the segments or increase our TX
> power or do we say stuff it and leave it as it is .. 
>  
> To date I haven't copied or heard a ZL on 40 mtrs yet I have copied a couple
> of VKs off and on 
>  
> 73 Phillip
> ZL2TZE
>  
>  
>  
> APRS HF Net Wednesday 19.30 Hrs NZT 3.650.00 +/- QRM
>
> _______________________________________________
> Ozaprs mailing list
> Ozaprs at aprs.net.au
> http://aprs.net.au/mailman/listinfo/ozaprs
>
>   

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