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ZL3AI > APRDIG 26.07.03 09:12l 259 Lines 9582 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jul 23, 6/8
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Stations Heard: Portable in Bimini /C6A
From: Rich Garcia <k4gps@bellsouth.net>
Date: 23 Jul 2003 15:00:34 -0400
X-Message-Number: 32
During a fishing trip this past week on Bimini I operated as K4GPS-
KC4HDK/C6A with a very VERY modest station. Here is the stats for anyone
who is interested.
Rig: IC-706 W/AutoTuner
Antenna: 30M dipole center conductor @6ft on a wood fence,shield laying
in the Caribian Ocean.
Software: MixW using homebrew interface
Path: Echo,Gate,WIDE,WIDE
Stations Heard and digi'ed through: PJ6DM-1 K1PIG, W1ON-3, C6AGH
On VHF my buddy did not connect the VHF PTT on the ACC plug so I was
only able to monitor.
Antenna: Diamond Dual Band Mobile with Antennex Ground Plane kit @8ft
hooked on the rain gutter.
Stations Heard: K4PKT-3 in WPB FL and N4HHP-2 in Ft. Lauderdale.
K4PKT-3 was solid while N4HHP-2 only came in at certain times of the
day. This is very impressive considering I was on the east side of the
island behind a ridge. If I walked up the ridge (50ft or so?) I was able
to hear the packets on my Icom HT.
There is no ham activity on this small island, I don't know how rare it
is for IOTA but it may be. Possibly next year we will plan a
mini-DXpidition with some better antennas and eqipment. It was crowded
and overloaded with 6 people on a 28ft Parker and supplies for 6 days
for 10 people.
Rich K4GPS
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Subject: Re: Running aprs in the car with a laptop
From: Joe Mayenschein <mayen1@mwt.net>
Date: Wed, 23 Jul 2003 15:14:11 -0500
X-Message-Number: 33
Plus a lot of "Electronics don't like the inverters, because of the usual
square wave output, nasty nasty,,
if the laptop can run on 12 to 15 vdc I'd go straight to the battery (with
fuses of course) and forget the rest.
Bill Herrmann wrote:
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Subject: Re: HF data question
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 23 Jul 2003 16:23:07 -0400 (EDT)
X-Message-Number: 34
On Mon, 21 Jul 2003, Scott Miller wrote:
>My weekend trip to Sequoia National Park... The lack of connectivity of
>any sort deep in the park got me thinking about HF data modes.
Actually what it makes me think of is my posting after I went to the Grand
Canyon, that has 10,000 visitors a day meaning 500 hams a day in the park.
But NO APRS support. At that time I posted that we the APRS community
need to think about WHERE travelers cluster and where APRS coverage is
NEEDED, not just making sure we have coverage in our basements.
This means, big parks, big tourist areas in remote places, and AIRPORTS.
etc... should all have a digi...
Bob
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Subject: Re: APRS IP address
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 23 Jul 2003 16:28:04 -0400 (EDT)
X-Message-Number: 35
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....
Thats easy. Because you can go to Kmart and buy one for $50...
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Subject: Re: HF data question
From: WA8LMF2@aol.com
Date: Wed, 23 Jul 2003 17:13:31 EDT
X-Message-Number: 36
In a message dated 7/23/2003 1:29:58 PM Pacific Daylight Time,
bruninga@usna.edu writes:
>At that time I posted that we the APRS community
>need to think about WHERE travelers cluster and where APRS coverage is
>NEEDED, not just making sure we have coverage in our basements.
>
>This means, big parks, big tourist areas in remote places, and AIRPORTS.
>etc... should all have a digi...
For what it's worth
When i visited Yosemite Park in the CA Sierras last month I was suprised to
hear an APRS digi beaconing at regular intervals. (Yosemite Valley is a
completely closed-in area surrounded by sheer granite walls thousands of
feet higher and is totally "RF-proof"). I heard it's beacons but couldn't
hear my own transmissions get repeated (or anyone else in the California
central valley outside the park).
I have been told the configuration is screwed up and non-functional, but
the operator can't reach it (it's on some really remote peak) to reset it.
So it continues to confound vistors that hear it's beacon but can't get
repeated by it.
Stephen H. Smith wa8lmf (at) aol.com
Home Page: http://wa8lmf.com
Ham Radio/Mobile SSTV page: http://members.aol.com/wa8lmf/ham
APRS Stuff
http://members.aol.com/wa8lmf/aprs
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Subject: Re: Running aprs in the car with a laptop
From: "Mike Yetsko" <myetsko@insydesw.com>
Date: Wed, 23 Jul 2003 17:26:25 -0400
X-Message-Number: 37
From: "Joe Mayenschein" <mayen1@mwt.net>
>Plus a lot of "Electronics don't like the inverters, because of the usual
>square wave output, nasty nasty,,
>
>if the laptop can run on 12 to 15 vdc I'd go straight to the battery (with
>fuses of course) and forget the rest.
Be aware of other issues...
My ThinkPad takes about 18v. It works just fine all the way down to 12v.
Mostly. I can run it in the lighter at 14 or so volts.
So I thought no problem, and ran it off a gel cell when we had repeated
thunderstorms yesterday and my power went off 6 times.
It WORKS fine, but gets hotter than my stove at 12v. So hot, the case is a
bit 'warped' right now...
Mike
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Subject: DOS decoding of raw TNC data
From: Mark Earle <wa2mct@mearle.com>
Date: Wed, 23 Jul 2003 17:01:52 -0500
X-Message-Number: 38
Hello,
I am looking for a program which will decode and display, in text, data
from the tnc which would be monitoring the 144.39 APRS frequency. In
particular, decode/ display the MIC-E packets, etc. It would be nice if it
would output:
Lat/Lon Speed/Heading Remarks Beacon info Messages
The application is to use this from a couple of 4.77 Mhz v-20 processor
palm sized computers (Zeos Pocket PC). I already have softwaer which will
decode and display nicely, NMEA/ GPS data.
It would also be nice if itd display the
data from that.. instead of just from the serial input real-time.
Note: APRS-DOS will not run on this palmtop.. APRS-DOS seems to require a
VGA or better display, which this PC does not have. Also only 340k or so of
storage (about the amount on a 5.25" floppy.
If you know of something that will work, please let me know! Thanks.
) ) de WA2MCT Mark
( (
) ) You will be assimilated... oooh, coffee!!
_|****| http://www.findu.com/cgi-bin/find.cgi?wa2mct-8 Home
( | | http://www.findu.com/cgi-bin/find.cgi?wa2mct-9 Mobile
`|____| wa2mct@mearle.com wa2mct@juno.com www.mearle.com/mark
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Subject: Re: DOS decoding of raw TNC data
From: "Curt Mills, WE7U" <hacker@tc.fluke.com>
Date: Wed, 23 Jul 2003 15:12:26 -0700 (PDT)
X-Message-Number: 39
Well, you could merge a couple of programs together to do this. Lane
Holdcroft and I wrote "gps.pl" which displays gps data like you're
describing. Actually it displays the different pieces in fixed places on
the display. Runs on DOS and Linux and is written in Perl. Uses text
output only.
The guy who put together the APRS spec, Ian, wrote an APRS decoder in Perl.
It uses text-mode only.
Combine the two and you'd have something nice. One problem with DOS though
is that the serial drivers suck. We solved that by loading in some Fossil
drivers first.
Look around my ftp site. There's a link to it from
www.eskimo.com/~archer (on the left). You'll find gps.pl there.
--
Curt Mills, WE7U hacker_NO_SPAM_@tc.fluke.com
Senior Methods Engineer/SysAdmin
"Lotto: A tax on people who are bad at math!"
"Windows: Microsoft's tax on computer illiterates!" -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
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Subject: Re: running a laptop in the car
From: rwf <rwf@bsrg.org>
Date: Wed, 23 Jul 2003 19:18:50 -0400
X-Message-Number: 40
I think I have run a laptop in the car about since APRS began, and I will
tell you what I have learned.
110V Laptops
If the laptop MUST run on 110V (like some of the Compaqs that the AC plug
terminates right into), then you have no choice but an inverter.
Use one just large enough for the load and make sure it will disconnect
itself from the battery when the voltage drops too low.
The efficiency is very high with the new units, but they'll still suck a
battery dry if the car's off.
DC powered laptops
NEVER NEVER NEVER power it right off the car's 12V. The PC supply was
designed to run on a certain voltage and why risk the damage? You may
think that because your PC runs on this or that voltage and because that's
pretty close to what the NOMINAL car voltage is, that you can get away with
it. And you might... for a while.
Use the proper 12V adapter recommended for that PC. Usually they are DC/DC
converters and will do a good job with really good efficiency. They are all
over Ebay.
I use one I got from Xtend in Irvine CA. It is called a Microbolt. Many of
you have seen my units and have bought units like it.
Good luck
Ralph N4NEQ
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