[OZAPRS] HF Gateways

[Ray Wells]

I wouldn't write off 80m completely, even though its use would be limited.

Yes, the static crashes at night are a downer but if you're looking at 
relatively short range - out to about 400km - and you can erect an 
antenna, daytime 80m is remarkably good. Mind you, a local daytime 
electrical storm has quite an impact too :-(

When I did a lot of travelling with HF onboard, if I could erect a 
dipole, albeit close to the ground, we regularly (read as daily) worked 
out to 400km. Signal levels were often low but there was usually little 
band noise so s/n ratio was high. FM was performance was quite 
impressive compared with SSB. We did some testing with narrow deviation.

VK2AAB and I came very close to resorting to 80m for daytime BBS 
forwarding some months back when 40m (our usual band) completely died 
for quite some weeks. We're nearly 400km apart. 40m came good and we 
didn't have to try 80m.

Ray vk2tv

VK2KFJ wrote:
>  yeh pretty much the noise & static crashes,   and its useless during daytime.
> I remember some guys trying packet radio on 80m years ago and they gave up that it was easier to pick up the microphone to get a message through.
>
> Steve VK2KFJ
>
>
> --- On Thu, 25/6/09, Jamie Campbell - VK2YCJ <vk2ycj at bravo.net.au> wrote:
>
>   
>> From: Jamie Campbell - VK2YCJ <vk2ycj at bravo.net.au>
>> Subject: Re: [OZAPRS] HF Gateways
>> To: "Australian APRS Users" <ozaprs at aprs.net.au>
>> Received: Thursday, 25 June, 2009, 10:49 AM
>> Steve,
>>
>> Thanks for the reply.
>>
>> Would you not bother with 80m because of the noise (mainly
>> at night) or the 
>> relatively short range during the day ?
>>
>> Okay, does that mean that 40m is the most popular at
>> present ?
>>
>> 40m isn't too crash hot now with the sunspot cycle the way
>> it is, although 
>> if there was an abundance of base stations the coverage
>> could be extremely 
>> good.
>>
>> With a few dozen $150 boxes around the place we could have
>> "armchair 
>> coverage" across Australia, haha :)
>>
>>
>>
>> Jamie Campbell
>> vk2ycj at bravo.net.au
>>
>>
>> You'll never reach your greatest potential if you walk
>> past the dishwasher without emptying it or leave your
>> costume on the bathroom floor.
>>
>> (Nancy-Bird Walton, Australian Aviatrix, 1915-2009)
>>
>>
>> ----- Original Message ----- 
>> From: "VK2KFJ" <vk2kfj at yahoo.com.au>
>> To: <Ozaprs at aprs.net.au>;
>> "Australian APRS Users" <ozaprs at aprs.net.au>
>> Sent: Thursday, June 25, 2009 10:28 AM
>> Subject: Re: [OZAPRS] HF Gateways
>>
>>
>>     
>>> Hi Jamie,
>>>
>>> you just wouldn't bother with 80m,
>>>
>>> however, you on the right track at looking at cheap
>>>       
>> dedicated xcvr,
>>     
>>> I have been thinking about it myself,
>>>
>>> so what you could do is take the 80m xcvr and
>>>       
>> modify/adapt it to work on 
>>     
>>> 40m.
>>>
>>> Any radio can be made to work anywhere, its just a
>>>       
>> matter of how much 
>>     
>>> time, money & effort you want to put into it.
>>>
>>> cheers,
>>>
>>> Steve VK2KFJ, Sydney Australia. http://www.qsl.net/vk2kfj/
>>>
>>>
>>> --- On Tue, 23/6/09, Jamie Campbell - VK2YCJ <vk2ycj at bravo.net.au>
>>>       
>> wrote:
>>     
>>>> From: Jamie Campbell - VK2YCJ <vk2ycj at bravo.net.au>
>>>> Subject: [OZAPRS] HF Gateways
>>>> To: Ozaprs at aprs.net.au
>>>> Received: Tuesday, 23 June, 2009, 6:21 PM
>>>> Gudday,
>>>>
>>>> If one was going to build a dedicated box (rx/tx)
>>>>         
>> and
>>     
>>>> antenna system for the car for APRS, what would be
>>>>         
>> the most
>>     
>>>> appropriate HF band to use ? 40m, 30m, 20m
>>>> ?
>>>>
>>>> Does anyone ever use 80m for APRS ? Why
>>>> not ?
>>>>
>>>>
>>>> The boys at the Mid North Coast Amateur Radio Club
>>>>         
>> ( 
>>     
>>>> http://www.mncarg.org ) have recently bought some kits
>>>> for a small 80m 5W SSB Tranceiver. It's a very
>>>>         
>> neat
>>     
>>>> little kit and costs about $150. At that price
>>>>         
>> and
>>     
>>>> size it would be ideal for a standalone APRS box,
>>>>         
>> but I am
>>     
>>>> not sure if the kit is available for other bands.
>>>>
>>>> Any comments or suggestions appreciated.
>>>>
>>>>
>>>> Thanks ...
>>>>
>>>> Jamie Campbell
>>>> vk2ycj at bravo.net.au
>>>>
>>>>
>>>> You'll never reach your greatest potential if you
>>>>         
>> walk
>>     
>>>> past the dishwasher without emptying it or leave
>>>>         
>> your
>>     
>>>> costume on the bathroom floor.
>>>>
>>>> (Nancy-Bird Walton, Australian Aviatrix,
>>>>         
>> 1915-2009)
>>     
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>>>>
>>>>         
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>>     
>
>
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