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[aprssig] APRS outside of ham radio ? (was it Lives)

scott at opentrac.org scott at opentrac.org
Sat Feb 11 21:59:01 UTC 2006


It's 31.25 bps BPSK.  Plain text format, a la PropNet, but without the
checksum (so far).

Scott
N1VG 

> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org 
> [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Andrew Rich
> Sent: Saturday, February 11, 2006 1:54 PM
> To: TAPR APRS Mailing List
> Subject: RE: [aprssig] APRS outside of ham radio ? (was it Lives)
> 
> Scott
> 
> What format of psk31 is your psk31 firmware ?
> 
> 300 baud packet and 1200 baud packet work well
> 
> 
> 
> -----------------------------------------
> Andrew Rich
> Amateur radio callsign VK4TEC
> email: vk4tec at tech-software.net <mailto:vk4tec at tech-software.net>
> web: http://www.tech-software.net
> Brisbane AUSTRALIA
> 
> 
> 
> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org
> [mailto:aprssig-bounces at lists.tapr.org]On Behalf Of scott at opentrac.org
> Sent: Sunday, 12 February 2006 6:43 AM
> To: 'TAPR APRS Mailing List'
> Subject: RE: [aprssig] APRS outside of ham radio ? (was it Lives)
> 
> 
> > The battery is actually a 8.4 V rechargeable at 200 mA
> >
> > The LED off is 12 mA and the LED on is 26 mA.
> 
> You can replace the 78L05 regulator with an LDO regulator 
> like an LM2936 and
> save maybe 2 ma of idle current.  With some minor tweaks and 
> use of the
> still-experimental low-power mode, you can get idle current 
> down to 4 or 5
> ma - this is mostly useful for solar powered 1-wire weather stations,
> because anything with a GPS is going to draw a lot more 
> current anyway.
> 
> > I am wondering what / if are about using the APRS format on
> > other bands
> > besides hams ?
> 
> I don't know what Bob's take on this is these days - I know 
> the license on
> APRSdos is for amateur use only (or was, last I checked) but within my
> limited knowledge of intellectual property law, I know of 
> nothing preventing
> use of the protocol for other uses.  You need to be aware of 
> radio licensing
> restrictions, too - some commercial license classes (in some countries
> anyway) don't include any provisions for data.
> 
> > What is the miniumum callisign length etc ?
> 
> Callsign length in AX.25 is fixed at 6 characters plus a 
> 4-bit SSID.  As for
> legal requirements, you're going to have to check with local 
> laws about what
> constitutes a valid on-air ID.  I know that here you never 
> hear fire or
> police mobiles using a gov't-issued ID, just the base station.
> 
> > FIRE99-9
> >
> > That should give us 99 trucks
> 
> For SAR, I've used callsigns like 31R14 for 31 Rescue 14 (home station
> number, type, and unit number.)  Or just plain R14, so it 
> matches the big
> numbers on the roof of the truck.  For fire, it might be 
> company and engine
> number - whatever makes sense for whoever's got to look at the map.
> 
> For Aussie-specific rules, Darryl Smith might be able to help 
> you out.  I'm
> sure there are others on the SIG as well who might know.
> 
> Scott
> N1VG
> 
> 
> 
> 
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