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ZL3AI > APRDIG 13.12.06 03:42l 260 Lines 8958 Bytes #999 (0) @ WW
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Subj: [APRSSIG] Vol 30 #4, 1/2
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From: ZL3AI@ZL2BAU.#79.NZL.OC
To : APRDIG@WW
Today's Topics:
1. Re: smallest tracker? (Greg Clark)
2. RE: smallest tracker? (Scott Miller)
3. Battery Backup using Astron Supplies... (Kriss A Kliegle)
4. RE: smallest tracker? (Rochte, Robert)
5. RE: smallest tracker? (Scott Miller)
6. Re: backup pwr systems (Joe Della Barba)
7. Sats and ISS (flknbry)
8. Re: Sats and ISS (Rich Walrath)
9. Re: backup pwr systems (Ben Lindner)
10. Re: backup pwr systems (VE7GDH)
11. RE: smallest tracker? (Rochte, Robert)
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Message: 1
Date: Mon, 4 Dec 2006 10:03:42 -0800
From: "Greg Clark" <K7RKT_at_bigredbee.com>
Subject: Re: [aprssig] smallest tracker?
On 12/4/06, Jason Winningham <jdw_at_eng.uah.edu> wrote:
>
>Here's a very low power model meant for the rocketry folks, operates
>on 70cm. I've never seen anything smaller:
>
>http://www.bigredbee.com/BeeLineGPS.htm
Yes, the BeeLine GPS is currently only available in 70cm, although 2Meter
protypes are up and running.. Weight? 2 ounce with battery. Very low
power output, line of site tracking (in the air) in excess of 20 miles.
Battery life 8+ hours
A 2 meter version with amplified (1/2 watt?) output is in the works
-- Greg, K7RKT
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Message: 2
Date: Mon, 4 Dec 2006 10:22:12 -0800
From: "Scott Miller" <scott_at_opentrac.org>
Subject: RE: [aprssig] smallest tracker?
>I still think the TH-D7 with a GPS attached is the best over all portable
>tracker. Of course this excludes balloon projects and the like.
Meh. I think my D7A is great for sending messages and such (I use it all
the time to control Tracker2s) but I'm not terribly impressed with it as a
tracker. No SmartBeaconing, mediocre battery life, clunky form factor. As
a voice radio, I'd much rather carry around my son's VX-150 on my belt than
the D7A. It's useful, but far from perfect.
Scott
N1VG
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Message: 3
Date: Mon, 4 Dec 2006 14:22:36 -0500
From: "Kriss A Kliegle" <kliegle_at_comcast.net>
Subject: [aprssig] Battery Backup using Astron Supplies...
Here's the link I used to modify my Astrons:
http://www.repeater-builder.com/astron/astron-index.html
About halfway down the page is:
Battery Back-up modification for Astron Linear Series Power Supplies...
Here's the schematic:
http://www.repeater-builder.com/astron/astron-rsbatmod.jpg
Enjoy!
Kriss KA1GJU
KA1GJU-3 Solar Powered WX Digi
KA1GJU-7 Truck
KA1GGJU-9 VW Jetta TDI
W1WQM -PCARC Digi
------------------------------
Message: 4
Date: Mon, 4 Dec 2006 14:56:47 -0500
From: "Rochte, Robert" <rrochte_at_gpacademy.org>
Subject: RE: [aprssig] smallest tracker?
>Yes, the BeeLine GPS is currently only available in 70cm, although
>2Meter protypes are up and running.. Weight? 2 ounce with battery.
That's close to what I need - I'm looking for a total system weight of
about 30 grams (about half of the BeeLine, but perhaps it's lighter with a
smaller battery).
Sorry for not clarifying the size requirement in the first place... I'm
considering this for a future student project here at our school - not
solar Montgolfieres this time, but homing pigeons! :)
73,
Robert
------------------------------
Message: 5
Date: Mon, 4 Dec 2006 12:18:08 -0800
From: "Scott Miller" <scott_at_opentrac.org>
Subject: RE: [aprssig] smallest tracker?
Seems like the GPS antenna weight might be a problem - patches are kind of
heavy. You might check out the Sarantel Geohelix P2. Without the sleeve,
it's 7 grams. I've got a tiny SiRF receiver to go with it, but I haven't
put the whole thing together yet. A datalogger would certainly be easier
than an APRS transmitter, if you don't need live updates. Pigeons have
proven their ability to carry multiple gigabytes of data...
WAIKATO TIMES - STORY: Nick Andreef's pigeons are faster than the internet,
but no match for falcons.
In October Mr Andreef -- who runs Waitomo Adventures -- began commercial
operation of what he reckons is a world first -- using homing pigeons to
deliver digital photographs.
Mr Andreef's company runs tours through a network of caves spread across a
20km radius.
A spin-off from the trips is for customers to buy pictures of their
adventures.
But by the time tourists were bussed back from their caving adventure to
base office, they often did not have time to wait for photos to be
downloaded and printed.
Mr Andreef said he rattled his brain to think of a way staff could work on
the digital images before the tourists got back.
"We don't have phone lines and telephone exchanges of sufficient quality to
transmit the data, so we came up with the pigeon concept."
Caving guides took the memory stick from their cameras and attached it to a
velcro pack on the pigeon.
"It only takes the pigeons about six minutes for their journey," said Mr
Andreef.
"They can transfer three gigs over 20km faster than the internet."
Some tourists were sceptical -- but the pigeons were 99 per cent reliable,
Mr Andreef said. "They also work for peanuts."
The concept had just hit a snag however.
Nesting karearea (native falcons) have attacked and killed some of the
pigeons mid-flight.
"A pigeon can fly at a cruising speed of 65km/h, 100km/h when pushed," said
Mr Andreef. "But native falcons fly at up to 250km/h."
Once he discovered what was happening to his birds Mr Andreef grounded his
50-pigeon operation.
He expected the falcons' nesting season to finish within the next few weeks.
>-----Original Message-----
>
>>Yes, the BeeLine GPS is currently only available in 70cm, although
>>2Meter protypes are up and running.. Weight? 2 ounce with battery.
>
>That's close to what I need - I'm looking for a total system weight of about
>30 grams (about half of the BeeLine, but perhaps it's lighter with a smaller
>battery).
>
>Sorry for not clarifying the size requirement in the first place... I'm
>considering this for a future student project here at our school - not solar
>Montgolfieres this time, but homing pigeons! :)
>
>73,
>Robert
------------------------------
Message: 6
Date: Mon, 04 Dec 2006 18:27:48 -0500
From: Joe Della Barba <joe_at_dellabarba.com>
Subject: Re: [aprssig] backup pwr systems
Are you talking about a radio (original post) or an entire house?
For a house a genset is the only way to go IMHO. Plenty of them out
there in gas, diesel, and propane.
73
Joe N3HGB
VE7GDH wrote:
>Joe N3HGB wrote...
>
>>You guys are making this way too complicated. You just described a boat
>>plugged into shore power. The battery charger charges the batteries that
>>run the radio. When you unplug the cord and leave the dock, then you are
>>on battery power unless the engine is running. Just go buy a nice big
>>battery, gel or AGM preferred for indoors, and a decent battery charger.
>>The nice part is the battery charger only needs to keep up with the
>>average load, not the peak load.
>
>You're right! I should unplug the widescreen TV, TV satellite receiver, AV
>amp, AC supplies for radios in two different rooms not overly close to the
>deep cycle battery bank & inverter, as well as the fridge and microwave
>oven and all the lights throughout the house and get a small battery and
>charger and some candles to go with it and uncomplicate my backup power
>system <g> but then I wouldn't be able to keep several computers humming
>along when the power was off which was the real reason for my backup
>system. It's an added bonus that all the radios and related equipment keep
>running as well. Everyone should base their backup power system on what
>they need to keep running. Some people are happy waiting in the dark.
>Others will be satisfied if they can get a flashlight out and hook up a 2M
>radio and no APRS equipment and listen on the local repeater (if it's still
>running) to everyone commenting on how the power is off, but I like to be
>able to keep everything running. Everyone's needs are different. I just wish
>I had a boat as well - hi!
>
>73 es cul - Keith VE7GDH
------------------------------
Message: 7
Date: Mon, 4 Dec 2006 20:07:22 -0600
From: "flknbry" <flknbry_at_netzero.net>
Subject: [aprssig] Sats and ISS
Hi
Are any of the Satelites sent aloft for Aprs still downlinking on
144.390.And is the International space station still operating on 144.390?.
quentin
------------------------------
Message: 8
Date: Tue, 05 Dec 2006 02:52:40 +0000
From: "Rich Walrath" <rich_wal_at_rwpservice.com>
Subject: Re: [aprssig] Sats and ISS
As of today, I believe that the ISS is operating SIMPLEX on 145.8. Check
out the ISS Fanclub at http://www.issfanclub.com/ for the latest. When it
was overhead yesterday and this morning, there was a wonderful signal in
Guam.
73
Rich
N0PBQ
-----Original Message-----
>Are any of the Satelites sent aloft for Aprs still downlinking on
>144.390.And is the International space station still operating on 144.390?.
>quentin
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