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[aprssig] Doubling APRS messaging in ham radio overnight

Ronny Julian k4rjj at bellsouth.net
Tue Jan 27 17:57:04 UTC 2009


Works for me!  I'll be in touch off list since we are getting out of the 
APRS realm.  Ronny K4RJJ


Scott Miller wrote:
> How about not doing conversions?  I've found pager suppliers who specify 
> broad frequency ranges across several bands, including 2 meters.  I can 
> inquire and find out how large an order would be needed to get a custom 
> frequency.  (Too bad they're not likely to be easy to hack to work on AX.25)
>
> I already know of one outfit that'd probably be able to do it for a 500 
> unit minimum order.  That's a little more than I'd like to sink into 
> such a project right away, though, unless they're really cheap.
>
> Scott
> N1VG
>
> Dave Baxter wrote:
>   
>> I like that idea!
>>
>> Not sure how easy/dificult the pager conversion is, but over hear, I
>> think they use RF arround 175MHz, so not too far from 2m.   Can they be
>> made to monitor more than one frequency?  Like, scan for a signal?
>>
>> Finding a suitable frequency to use could be "interesting", we only have
>> 2MHz to play with, and most of that is band-planed, what isn't has all
>> sorts of "little private nets on", but only when you want to experiment
>> do they come out of the noise and complain..  Nothing new there then by
>> the sound of it!
>>
>> There are also "still some issues" putting up new stuff on 70cms these
>> days.
>>
>> Cheers.
>>
>> Dave G0WBX.
>>  
>>
>>     
>>> -----Original Message-----
>>> From: Ben Jackson [mailto:bbj at innismir.net] 
>>> Sent: 26 January 2009 13:48
>>> To: bruninga at usna.edu; aprssig at tapr.org; bruninga at usna.edu; 
>>> TAPR APRS Mailing List
>>> Subject: Re: [aprssig] Doubling APRS messaging in ham radio overnight
>>>
>>>
>>> On 1/24/2009, "Robert Bruninga" <bruninga at usna.edu> wrote:
>>>
>>>       
>>>> What we really need is someone to take on the simple task of a PIC 
>>>> converter to convert APRS messages to DTMF PAGING text 
>>>>         
>>> messages so that 
>>>       
>>>> those dozens of THOUSANDS of existing amateur radio DTMF paging HT's 
>>>> can be used to receive and send APRS messages.
>>>>         
>>> Bob, while the number of FT-51s and TH-78s might outnumber 
>>> THD7s, I think the question that needs to be asked is are the 
>>> owners interested in such a service? Instead of focusing on 
>>> older HTs that people may or may not have. Has anyone ever 
>>> looked at a APRS -> POCSAG[1] Gateway?
>>>
>>> Older, working pagers are a dime a dozen on the used market 
>>> and there are some people who have refitted them to work on 
>>> Amateur bands[2]. With the fact that there (quite literally) 
>>> buckets full of working pagers at HamFests, why not have a 
>>> "messagegate" that takes APRS messages to stations and 
>>> translates them to a message destined for a POCSAG compatible 
>>> pager. There were certain KAM TNCs that could encode POCSAG natively
>>>
>>> Comments? Laughter? Rotten tomatoes? :)
>>>
>>> ~Ben
>>>
>>> [1] http://en.wikipedia.org/wiki/POCSAG
>>> [2] http://www.qsl.net/kb9mwr/projects/pager/plan.html
>>>
>>>
>>>
>>>       
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>>     
>
>
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