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ZL3AI > APRDIG 15.05.04 20:53l 266 Lines 10809 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Apr 30, 4/6
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: 802.11x two serial ports.... 802.11 APRS ?
From: Jeff King <jeff@aerodata.net>
Date: Fri, 30 Apr 2004 11:53:35 -0500 (CDT)
X-Message-Number: 30
Hi Mark:
Correct me if I am wrong, but in theory what you suggest, actually exists
now. Can't most of the GUI programs send position reports on the internet
already?
So all it would take for a 802.11b internet connected ham to send position
reports is to run a APRS GUI if the above is true.
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Subject: IGate Server List
From: "Michael J. Pawlowsky" <mikep@mikeathome.net>
Date: Fri, 30 Apr 2004 12:55:30 -0400
X-Message-Number: 31
Is there a up to date list of servers that are public to connect to?
For some reason I can no longer connect to montreal.aprs.net.
Generally are these servers open to everyone?
Thanks,
Mike
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Subject: Re: 802.11x two serial ports.... 802.11 APRS ?
From: "J. Lance Cotton" <joe@lightningflash.net>
Date: Fri, 30 Apr 2004 12:16:05 -0500
X-Message-Number: 32
Yes, but it requires a server to connect to. An interesting application
would be to send APRS-IS packets not to some server via a TCP connection but
to send them via UDP broadcast, which when run over 802.11b would the
high-speed equivalent of today's AX.25 UI non-connected packets.
I believe the latest version of aprsd (for linux or unix-like systems)
incorporates something like this.
It would be an incredible thing, I think, if it worked this way. One could
simply run a background app that provided a pseudo TNC or pseudo internet
server and instead posted these to the Ethernet (and if that ethernet
happens to be 802.11b instead of 802.3, then all the better!)
Is this feasible? I don't remember all the details about the aprsd
implementation, but I think I understood it correctly.
Note that this would not really be part of the "Internet", but just 802.11b
packets floating around and would still need some Igate running. Think of it
as the same as the RF system is today, but with a different physical/link
layer, running the same way.
-Lance KJ5O
--
J. Lance Cotton, KJ5O
http://map.findu.com/kj5o-14
joe@lightningflash.net
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Subject: Re: D7 Antenna mods
From: wes@johnston.net
Date: Fri, 30 Apr 2004 13:16:59 -0400 (EDT)
X-Message-Number: 33
Now we need a fix for when you drop it and break the battery retaining clips
off the back... :-(
Wes
ham callsign: kd4rdb
find me: http://wesvan.zapto.org
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Subject: 802.11 APRS ?
From: "K. Mark Caviezel" <kmcaviezel@yahoo.com>
Date: Fri, 30 Apr 2004 10:22:35 -0700 (PDT)
X-Message-Number: 34
D'oh!
I believe you are correct, Jeff. Hmmmm maybe I need to get UI View running
in the car and try this out around town.
- KMC ac0ak Denver
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Subject: Re: 7-Channel NWR-SAME Weatheradio with USB Interface
From: Rich Osman <Rich@osman.com>
Date: Fri, 30 Apr 2004 12:30:13 -0500
X-Message-Number: 35
Mark Fellhauer wrote:
>Has anybody purchased this device yet?
>
>7-Channel NWR-SAME Weatheradio with USB Interface
>
>Catalog # : 12-258
>
>Thoughts? Comments?
>
>It looks interesting...
>
>Mark
>KC7BXS
Umm, from who? What catalog?
--
mailto:Rich@Osman.com http://www.rich.osman.com
Rich Osman; POB 93167; Southlake, TX 76092 (Near DFW Airport) ARS: N1OZ
If you receive something that says "Send this to everyone you know,"
PLEASE pretend you don't know me.
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Subject: Cross-country drive and APRS coverage report
From: "Stephen H. Smith" <WA8LMF2@aol.com>
Date: Fri, 30 Apr 2004 10:31:48 -0700
X-Message-Number: 36
I just got back to Pasadena, CA after a 5000 mile round trip to central
Michigan from Pasadena over the last three weeks.
The outbound trip was roughly along the line of the old Route 66; i.e. I-10
and I-40 east from L.A. through Flagstaff, Albuquerque, Tulsa, Oklahoma
City to Ft Smith AR. Then north on secondary roads (passed through
Bentonville AR and used a non-secured WiFi hot spot leaking out of Wal-Mart
world headquarters to check email from my car while parked at a Wendy's
across the street!) rejoining I-40 in Joplin MO. Then east to St Louis and
north east through central Illinois, Indianapolis and Ft Wayne to
Michigan.
The return trip was the usual fast shot via I-94 to Chicago, catching I-80
west to Iowa and Nebraska, forking off to Denver on I-76 to join I-70
across Colorado and Utah; then joining I-15 in west-central Utah for the
final shot south-west down to Las Vegas and then L.A.
Bottom Line: APRS coverage is greatly increased since a year and a half
ago!
The outbound trip had almost continuous 2M coverage (for a 50-watt radio
into a roof-mounted 5/8-wave whip) from L.A. to Michigan except for the
mountains of eastern NM and and the flat lands of northern TX. Even the
rolling hills of AR and western MO had almost continous coverage.
Also new compared to last year: Several times, I got voice calls on
146.52 from stations seeing my beacon on APRS.
The most unusual one was from a VE7 mobile on US64 east of Taos, NM. He was
running a TinyTrak and couldn't receive anything on APRS but heard my
beacons in the speaker of his radio. On an off-chance, he gave a "QRZ the
APRS Station" call on 146.52. I'm not sure who was more surprised: Me
hearing voice activity after hours of dead silence or him actually getting
a response! We stopped for an eyeball at a tiny roadside stop, EaglesNest,
that turned into a 2-hour mini PC and APRS expo. [ A friend had sold him a
TinyTrak just before he left B.C. on his trip. He had never seen an APRS
map display. My in-car UI-View mobile laptop display absolutely amazed him. ]
The return trip had the same extensive dead areas I have commented in the
past about on the APRSsig: West of Lincoln, NB, there is absolutely
nothing on I80/70 execept for the Denver metro area until you hit Utah
(which has a surprisingly comprehensive network of "super-wides" on 6-7-8
thousand foot mountain tops). You start getting into the network somewhere
between Grand Junction, CO and Green River, UT. The UT wides have near
total coverage of the Interstates but coverage gets very spotty when you
leave the main roads.
One striking change from a similar trip I made a year and a half ago, is
the now-nearly universal APRS WIDEn-N coverage in MO, IL, IN and MI. Last
time, this route was very spotty and where there was coverage, it was a
patchwork of dumb WIDE-only and WIDEn-N digis in various areas. One
--MAJOR-- improvement has been Iowa which now has almost continuous WIDEn-N
coverage along the entire I-80 corridor.
[ Hassan: Does anyone actually listen to that 442.800 UHF SSTV repeater
west of Des Moines being beaconed as an object with your call on APRS? I
have tried three times now, as I have passed through on various trips, to
get a response from someone on it without success. I always pop off a few
LiveCAM shots though, just in case someone is autologging SSTV
transmissions coming through it. ]
When I am traveling, I move the HF rig (FT-100) and autotune antenna (Icom
AH4 coupler and SGC-303 whip) to 30M and blast off a few posits whenever I
become aware that I haven't heard any "my call digid" beeps from the 2M rig
for a half hour or so. Normally, I will send 2 or 3 posits manually in
rapid succession to ensure that one gets through; then let it beacon once
every 15 minutes until I hear life again on two meters.
Most of the time when I am on the road on a long trip, I am on 20, 15 or 10
meters running SSTV mobile with a live camera on the dash capturing the
road ahead. I talk up APRS a lot on the SSTV freqs.
My CQ and ID slide says:
CQ DE WA8LMF
Mobile SSTV LiveCAM
[ Image of APRS Logo ]
Current position via APRS
http://wa8lmf.com
[The WA8LMF homepage has APRS links to both Findu and my personal
webserver.] When I don't have current 2M coverage, I will actually tell the
station I am working to standby a moment, QSY to 30M, pop off two posits
and return to whatever band I was on. [ The Icom AH4 autotune coupler and
whip lets you do this in less than 20 seconds round trip.] I had no trouble
getting igated on the first try on HF, in even very rugged terrain east of
Taos and Santa Fe NM.
I found unsecured WiFi hot spots leaking Internet access into the street
just about everywhere, even in the smallest towns. The WiFi access let me
check findu from my car to confirm that my HF transmissions got out. Two
nights on the road (In Albuquerque, NM and in Branson, MO) I actually
connected to 802.11b hotspots of nearby businesses from INSIDE my motel
room.
In Lincoln, NB I experimented with messaging my own home station
[ WA8LMF-13 ] from the car. I found another random WiFi hot spot and
connected to my home computer (doing APRS server duty via a cable modem) in
Pasadena, CA from the car using LapLink remote control (which echoes the
entire screen of the PC being accessed to the remote location). [Before I
left, I configured the UI-WebServer PC to also automatically load LapLink
when it boots. ] Thus, I was able to experiment with messages sent on two
meters from the car, and immediately see the results in Pasadena in a
second window on the same PC in the car. Way Cool!
The Pasadena machine received the messages successfully, but the acks never
made it back to the car in Lincoln. Even when I originated a message
from the Pasadena machine (by remotely operating it via LapLink) to port "I
-- Internet", it didn't make it to RF in Lincoln, though findu shows the
message as having made it successfully to the Internet stream. A
reverse-gating issue I guess... I wonder if my Lincoln RF actually
entered the Internet in Omaha (about 1 or 2 digi hops away to the east)so
that the Internet gateway didn't consider me local for return messages?
By the way, on this trip, I found that the way to quickly find unsecured
WiFi hotspots is not to cruise business districts, but rather look for
residential districts of high-density housing (large apartment or
condominium complexes). Such areas would ALWAYS yield at least 4 or 5
channels to connect on.
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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