| |
ZL3AI > APRDIG 25.07.03 08:53l 274 Lines 10744 Bytes #999 (0) @ WW
BID : 1662-ZL3AI
Read: GUEST
Subj: TAPR Digest, Jul 22, 3/7
Path: DB0FHN<DB0RGB<OK0PPL<DB0RES<ON0AR<VK6HGR<ZL2BAU<ZL3VML
Sent: 030724/1108Z @:ZL3VML.#80.NZL.OC #:4917 [Chch-NZ] FBB7.00i $:1662-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Running aprs in the car with a laptop
From: "Roy Bost" <rbost@itexas.net>
Date: Tue, 22 Jul 2003 14:26:26 -0500
X-Message-Number: 18
I use an old Panasonic Toughbook with the Panasonic dc-dc converter. But
in the case of the Panasonic, it is not necessary to run a dc-dc converter
and here's why. The battery in the laptop is 10.8v and the output of the
ac-dc converter is 15v. I checked with the Panasonic tech folks and was
told that as long as the input voltage was greater than the battery
voltage, everything was ok. Only one problem arises, the lower the input
voltage the longer it takes to charge the battery. My second question to
the tech folks was about leaving the computer hooked into a power source
24/7. I ruined a PC battery doing that...ok with the Panasonic. Try to
use TFT screens....other types dont like the heat and cold in a car.
----------------------------------------------------------------------
Subject: Radio question
From: "Scott Miller" <scott@opentrac.org>
Date: Tue, 22 Jul 2003 13:13:15 -0700
X-Message-Number: 19
Anyone used an IC-2350H for digital work? A ham across the hall is getting
rid of his to make room for a D700 and I could use a decent dual-bander.
And where might I find out what it's worth? I usually check eBay, but can't
find any in the completed auctions. He's asking $xxx, which seems
reasonable.
Scott
N1VG
----------------------------------------------------------------------
Subject: Re: aprs2.net Tier 2 Update
From: Adi Linden <adil@adis.on.ca>
Date: Tue, 22 Jul 2003 15:19:10 -0500 (CDT)
X-Message-Number: 20
>arizona.aprs2.net (APRSWEST)- Port 14579=West US, Port 14578=East US
>socal.aprs2.net (APRSCA)- Port 14579=California
>texas.aprs2.net (APRSTAMU)- Port 14579=Central US, Port 14578=Texas
>knoxville.aprs2.net (APRSKNOX)- Port 14579=East US
>uk.aprs2.net
Question, what does aprs2.net do? How does it relate to second.aprs.net,
etc.?
Thanks,
Adi
--
Adi Linden | va3adi | va3adi@adis.ca | http://adis.ca
+-----------------------------------------------------------------+
IRLP Node 2590 in Sioux Lookout, Ontario
----------------------------------------------------------------------
Subject: RE: peet ult 2100 to kpc3+ settings
From: "stanzepa@earthlink.net" <stanzepa@earthlink.net>
Date: Tue, 22 Jul 2003 16:19:30 -0400
X-Message-Number: 21
http://www.tapr.org/%7ewa1lou/tnc_settings.html
Original Message:
-----------------
From: Dennis walkerdh@telusplanet.net
Date: Tue, 22 Jul 2003 12:42:14 -0600
To: aprssig@lists.tapr.org
Subject: [aprssig] peet ult 2100 to kpc3+ settings
Hi all.
Helping a freind setup his Peet Ult 2100 and Kpc3+ to output our local wx to
aprs. I could use some help with
the settings in the kpc3+. If someone could send me their
settings , off the sig I would appreciate it. TIA.
dennis (ve6dhw
----------------------------------------------------------------------
Subject: Re: $25 GPS - price includes 1200 bps data Radio !!!!
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Tue, 22 Jul 2003 15:40:12 -0500
X-Message-Number: 22
At 01:40 PM 7/22/2003, Scott Miller wrote:
>Yes, the system is known as Assisted GPS, and it's used in the T720
>cellphone on my belt right now. See
>http://www.lucent.com/livelink/090094038000e51f_White_paper.pdf.
Didn't we just have this conversation about 2 weeks ago?
http://www.cdmatech.com/solutions/position_location.jsp?L2=position_location
BTW, I just got an automated severe weather statement on the text messaging
side of my Assisted-GPS LG VX4400 cellphone - Funnel Clouds sited in area -
then by pressing a few buttons forwarded it on to another person I know
with text messaging...and he replied "Thx for the warning"...
I feel like Buck Rogers (the cartoon hero, not K4ABT)
73,
Mark
KC7BXS
----------------------------------------------------------------------
Subject: Re: Running aprs in the car with a laptop
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Tue, 22 Jul 2003 15:35:28 -0500
X-Message-Number: 23
My only objections to running an inverter is that it adds to the "python"
of wiring already in the vehicle. AND most inverters want to see well
above 12 volts. My puny 75 watt inverter will alarm and shut off if the 50
watt transceiver TX's when the engine isn't running. And I have one of
these Deep Cycle Marine spiral cell batteries...
OTOH, my Radio Shack DC-to-DC adapter will still pump out a regulated 18
volts even of the input voltage drops to 10 volts or so. Yeah, I have a
manual transmission and I can push start my car... :)
73,
Mark
KC7BXS
----------------------------------------------------------------------
Subject: Re: aprs2.net Tier 2 Update
From: "Phil Pacier, AD6NH" <ad6nh@arrl.net>
Date: Tue, 22 Jul 2003 15:47:3
X-Message-Number: 24
aprs2.net is the domain name of the Tier 2 network. Now, I'll preface this
by saying that this is but one approach to structuring the APRS IS, but in
our opinion it is the better choice. second.aprs.net, et al are the "Core"
server network; basically the end-all of the APRS-IS. The Tier concept
states that only Tier 2 servers should connect to these core servers. The
end users (Igates, weather stations, whatever) connect to the Tier 2
servers. Using this template, the aprs2.net servers connect to a single
core server (first, second, etc.) The servers on the aprs2.net network
offer many port choices that the core servers don't, such as regional feeds
and the 14580 user-definable filter port (yes, second and fourth also offer
this port). Basically that's all there is to it. The idea is that a user
can put the said list of aprs2.net servers in their internet settings, and
the client program (UI-View, SA, whatever) will rotate between these
servers if a connection is lost for any reason, providing near-100% uptime.
That is the concept in a very small nutshell. 73
Phillip Pacier - AD6NH
socal.aprs2.net
http://www.aprsca.net
----------------------------------------------------------------------
Subject: Running aprs in the car with a laptop
From: Gonzales Andy <agonzales@arc.nasa.gov>
Date: Tue, 22 Jul 2003 13:52:36 -0700
X-Message-Number: 25
I am about to try that on a medium distance trip from San Jose, CA to
San Luis Obispo, CA --- TODAY from 3 PM to 8 PM including breaks for
a meal and to adjust my rig. During the intial phase, I will be
driving with a D7 running in stand-alone APRS. During the middle part
of the trip, my 18 year old son will be driving. I'll be operating
WinAPRS and Street ATLAS 2003 in parallel(APRS+SA doesn;t work with
2003 version). I'll be attempting to send emails and even cell phone
text messages via email. My wife will be watching at home.
I have tried several short distance shakedown cruises but was
handicapped by being alone. You certainly need to pay attention to
driving and not try to multi-task in APRS ! I'll be returning
Saturday from 2 PM to 7 PM.
My laptop is a used Dell from EBAY and the biggest problem has been
keeping the port connections in. It also gets hot with its metal
case and can "thermal out" if left in the sun in a warm car.
Running all the wires, even neatly tied, makes the passenger side a
little cozy.
More when I get back.
Look / listen for me . KG6RWO-1
--
Andy Gonzales
NASA / Ames Research Center
Moffett Field, CA 94035-1000
Bldg. N-244, Rm. 240
MS 244-19
agonzales@arc.nasa.gov
650-604-0309
----------------------------------------------------------------------
Subject: Re: Running aprs in the car with a laptop
From: Gonzales Andy <agonzales@arc.nasa.gov>
Date: Tue, 22 Jul 2003 14:00:48 -0700
X-Message-Number: 26
Oh, on the power question. I use vrious device adapaters that connect
to the dedicated power port in my Ford Escape, which is always on.
Newer cars have them, I have one in the back too, older cars may not
have them.I also use the lighter adapter. The laptop, GPS, and D7 are
on the power port. A cell phone is on the lighter which is not always
on/ The power port is protected by a 20 A fuse in the main power
distribution block and a 10 A fuse in-line with the triple adapter.
So far no problems but I will watch the heating. The laptop alwasy
runs hot, even when its internal batteries.
--
Andy Gonzales
NASA / Ames Research Center
Moffett Field, CA 94035-1000
Bldg. N-244, Rm. 240
MS 244-19
agonzales@arc.nasa.gov
650-604-0309
----------------------------------------------------------------------
Subject: Re: aprs2.net Tier 2 Update
From: Steve Dimse <k4hg@tapr.org>
Date: Tue, 22 Jul 2003 17:06:48 -0400
X-Message-Number: 27
On 7/22/03 at 3:19 PM Adi Linden <adil@adis.on.ca> sent:
>>arizona.aprs2.net (APRSWEST)- Port 14579=West US, Port 14578=East US
>>socal.aprs2.net (APRSCA)- Port 14579=California
>>texas.aprs2.net (APRSTAMU)- Port 14579=Central US, Port 14578=Texas
>>knoxville.aprs2.net (APRSKNOX)- Port 14579=East US
>>uk.aprs2.net
>
>Question, what does aprs2.net do? How does it relate to second.aprs.net,
>etc.?
The tier two network was set up by and for those people who felt that the
central hub concept and/or implementation was flawed.
I feel there is certainly nothing wrong with the concept of the central hub
network, and the only thing wrong with the implementation is that one of
the hubs has a connection limit below the level it ought to be. At present
there are 4 hubs, first, second, third, and fourth.aprs.net, of which only
third has a low connection limit.
For a client wishing to connect, the simplest way is to simply use the name
"rotate.aprs.net" on port 23. This name randomly returns one of the 4
central servers when looked for in DNS. For those clients that support list
of multiple servers, I recommend putting all 4 in the connection list (1,
2, 3, and 4.aprs.net can be used rather than first, second, third, and
fourth.aprs.net if you prefer to save a few keystrokes!)
My biggest objection to the second tier concept is it increases the maximum
number of hubs the packet must travel though between two users, to 4 from
2. This added complexity serves no useful purpose I can see, it only adds
more points of failure to the APRS Internet System. If the problem is
simply one of inadequate capacity (which is presently not the problem,
third seems to be down, but there are still more than 200 open slots), I
see the answer as adding additional central hubs (or moving the existing
ones to sites where they can support higher connection limits) rather than
adding an entire additional layer.
Steve K4HG
----------------------------------------------------------------------
Read previous mail | Read next mail
| |
