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ZL3AI > APRDIG 25.07.03 08:57l 234 Lines 9327 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jul 22, 1/7
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Tuesday, July 22, 2003.
1. Re: APRS IP address
2. Re: APRS IP address
3. Running aprs in the car with a laptop
4. RE: [OZAPRS] Running aprs in the car with a laptop
5. RE: [OZAPRS] Running aprs in the car with a laptop
6. $25 GPS - price includes 1200 bps data Radio !!!!
7. Re: Running aprs in the car with a laptop
8. Re: Running aprs in the car with a laptop
9. Re: $25 GPS - price includes 1200 bps data Radio !!!!
10. Re: $25 GPS - price includes 1200 bps data Radio !!!!
11. Re: $25 GPS - price includes 1200 bps data Radio !!!!
12. aprs2.net Tier 2 Update
13. Re: $25 GPS - price includes 1200 bps data Radio !!!!
14. peet ult 2100 to kpc3+ settings
15. Re: [ Wes Johnston ] Re: APRS IP address
16. Re: Running aprs in the car with a laptop
17. Re: Running aprs in the car with a laptop
18. Re: Running aprs in the car with a laptop
19. Radio question
20. Re: aprs2.net Tier 2 Update
21. RE: peet ult 2100 to kpc3+ settings
22. Re: $25 GPS - price includes 1200 bps data Radio !!!!
23. Re: Running aprs in the car with a laptop
24. Re: aprs2.net Tier 2 Update
25. Running aprs in the car with a laptop
26. Re: Running aprs in the car with a laptop
27. Re: aprs2.net Tier 2 Update
28. Re: aprs2.net Tier 2 Update
29. RE: Running aprs in the car with a laptop
30. Re: Radio question
31. Re: aprs2.net Tier 2 Update
32. Re: Running aprs in the car with a laptop
33. Re: aprs2.net Tier 2 Update
34. Re: aprs2.net Tier 2 Update
35. Re: Running aprs in the car with a laptop
36. Re: aprssig digest: July 21, 2003
37. Re: Running aprs in the car with a laptop
38. RE: Running aprs in the car with a laptop
39. Reality check needed re uptimes and a soapbox rant, like it or not.
40. RE: Reality check needed re uptimes and a soapbox rant, like it or not.
41. Re: Reality check needed re uptimes and a soapbox rant, like it or not.
42. Re: Reality check needed re uptimes and a soapbox rant, like it or not.
43. RE: Reality check needed re uptimes and a soapbox rant, like it or not.
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Subject: Re: APRS IP address
From: Bill Vodall - WA7NWP <wa7nwp@jnos.org>
Date: Mon, 21 Jul 2003 21:50:27 -0700 (PDT)
X-Message-Number: 1
On Mon, 21 Jul 2003, Wes Johnston wrote:
>why is 802.11b any different than tcp/ip @ 9600 or 57,600? It's just the
>transport layer for pete's sake....
Right on. Same as DSL, Cable, T1, landline modem and carrier pigeon.
That's the beauty of it. Separates the application from the transport.
Same applications work on any transport layer as long as there's enough
bandwidth.
Bill - WA7NWP
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Subject: Re: APRS IP address
From: Tim Schall <ka7pbi@fortgirlfriend.ampr.org>
Date: Mon, 21 Jul 2003 23:29:16 -0700
X-Message-Number: 2
Oh for crying out loud. Here we got again. :)
Wether or not there's enough bandwidth depends largely on what compromises
you are willing to make. For instance, (Nothing to do with APRS here but
it's a good example.) those of us that have seen full uncompressed 1.5GBps
high definition video will never ever be convinced that HDTV as it stands
right now looks any good at all.
APRS, as we know it, does a pretty reasonable job of cramming a lot of useful
information into not very much bandwidth at all. Blah. It's a good idea.
Now back to drinking.
On Monday 21 July 2003 21:50, Bill Vodall - WA7NWP wrote:
>Same applications work on any transport layer as long as there's enough
>bandwidth.
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Subject: Running aprs in the car with a laptop
From: "Andrew VK4TEC" <vk4tec@hotmail.com>
Date: Wed, 23 Jul 2003 21:35:27 +1000
X-Message-Number: 3
Does anyone run a laptop in the car ?
I would like suggestions. DC-DC converter or inverter ?
Which is best ?
Andrew vk4tec
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Subject: RE: [OZAPRS] Running aprs in the car with a laptop
From: "Darryl Smith" <Darryl@radio-active.net.au>
Date: Tue, 22 Jul 2003 21:43:20 +1000
X-Message-Number: 4
DC-DC inverter is more expensive than an inverter.
Some people have connected their laptops straight to the 12V of the car
without problems. I have not had the courage to do that
If you use an inverter, just watch your ground potentials.
Darryl
---------
Darryl Smith, VK2TDS POBox 169 Ingleburn NSW 2565 Australia
Mobile Number 0412 929 634 [+61 4 12 929 634 International]
Darryl@radio-active.net.au | www.radio-active.net.au
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Subject: RE: [OZAPRS] Running aprs in the car with a laptop
From: Gerry Creager N5JXS <gerry.creager@tamu.edu>
Date: Tue, 22 Jul 2003 06:59:40 -0500
X-Message-Number: 5
If you are going to connect (a|| most) laptops to 12v directly, remove
the battery. I learned the hard way that the battery charging circuit
is usually expecting 17-20vDC and is unhappy with 12v. My laptops,
however, have run well on 12v with the battery removed.
gerry
--
Gerry Creager -- gerry.creager@tamu.edu
Network Engineering -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
Page: 979.228.0173
Office: 903A Eller Bldg, TAMU, College Station, TX 77843
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Subject: $25 GPS - price includes 1200 bps data Radio !!!!
From: "Sadowski, Allan" <allan.sadowski@ncshp.org>
Date: Tue, 22 Jul 2003 08:04:17 -0400
X-Message-Number: 6
http://www.bayarea.com/mld/mercurynews/business/6349353.htm
Wozniak's latest project: GPS locator tags for everything
By Jon Fortt
Mercury News
Steve Wozniak, the guy who brought us the personal computer, has another
idea. His new company has created a wireless network that he says can help
you find almost anything -- lost keys, lost dog, lost child. His Los Gatos
company -- Wheels of Zeus (WOZ, get it?) -- has designed tags that you can
attach to a child, a dog or just about anything. A handheld monitor uses
global-positioning-system satellites to show where the tagged items are.
The genius behind the idea, called wOzNet, is in the use of a low-power,
long-range wireless protocol that operates at about 1,200 baud. That's
roughly a fifth the speed of a dial-up modem, but fast enough to send a
quick burst of information about an object's location.
Wozniak co-founded Apple Computer nearly 30 years ago. He said this idea
came to life in a Los Gatos coffeehouse about a year and a half ago as
he was sharing ideas with friend Greg Galanos of Mobius Venture Capital.
Galanos started jotting things down on the back of a napkin. Mobius was
the first to invest in the company, putting up $6 million.
Wozniak said his team was trying to come up with a name that had a free
Internet address, but most of their ideas were ``dorky.'' He already
owned WOZ.com, so they came up with ``Wheels of Zeus.''
The company is still very small. Wozniak said he has 17 people, but Gina
Clark, vice president of business development and marketing, jokes that
he's counting some people three times. Aside from Wozniak and Clark, the
executive team includes Rich Rifredi, chief operating officer, and Frank
Canova, vice president of engineering.
Wozniak, who is known in Silicon Valley simply as ``Woz,'' didn't give
many details; the first products based on the technology probably won't
arrive for another year. But he did say the handheld monitor has a radio
that can detect tagged items within a one- or two-mile radius. The range
can be extended through the Internet, with other people's handheld
monitors creating an extended blanket network.
On top of that, he said the company has figured out a way to get a radio
and GPS together for $25 -- that's before the cost of a battery, screen
and all the other parts it takes to make a mobile device.
Wozniak said security is built into wOzNet, so that other people can't
track your things; though he said other people are free to track his
four dogs, if they like.
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Subject: Re: Running aprs in the car with a laptop
From: wes@johnston.net
Date: Tue, 22 Jul 2003 08:12:08 -0400 (EDT)
X-Message-Number: 7
Darryl says to use an inverter.... but I've had problems with RF shutting
down my inverter. Maybe I have a bad / cheap inverter, but it's worth
checking before you can't get money back from a purchase. At the moment
when I want to run a laptop in the car, I take great risks and run my hp800
directly off the cigarette lighter plug. While most laptops require 17 to
18 volts, the hp800 only requires 12v and runs very happily off the 14volts
in my car.
One other thing to watch out for (like Darryl said) is ground potentials.
Some older laptops used to cheat in an effort to get a slight negative
voltage out of their serial ports and they would raise the ground of the
laptop to +3v so that the effect was rs232 ports could swing -3v to +9v. Of
course all now use a charge pump to get +/-12v on their rs232, so this may
be a moot point to you.
Wes
ham callsign: kd4rdb
find me: http://wesvan.zapto.org
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