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ZL3AI > APRDIG 22.05.04 23:17l 260 Lines 9322 Bytes #999 (0) @ WW
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Friday, May 14, 2004.
1. Re: laptop
2. Re: USB interface standard
3. New into APRS - what to use?
4. USB TNC Link
5. Re: laptop (APRSdos works great!)
6. RE: USB TNC Link
7. Re: New into APRS - what to use?
8. Re: laptop
9. Re: USB interface standard Was: Re: laptop
10. Re: USB interface standard Was: Re: laptop
11. Re: laptop
12. Re: laptop
13. Re: laptop
14. RE: laptop
15. Conversation with Kenwood at Dayton
16. Re: laptop
17. RE: Conversation with Kenwood at Dayton
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Subject: Re: laptop
From: David VanHorn <dvanhorn@cedar.net>
Date: Thu, 13 May 2004 23:10:28 -0500
X-Message-Number: 1
>(And I'm even doing
>tricks with my software where I include a 'multiplexor' to put
>multiple devices on one com port.)
Years ago I proposed this, with four and eight port versions, but it was
useless w/o support on the application side. No takers.. Today I use
edgeports, which is what my box would have looked like, minus diagnostic
leds, and 12V power. If I didn't get them from Ebay, I would still be
after the mux solution as the 8 port edgeports are $600+.
I still have that mux code.
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Subject: Re: USB interface standard
From: "\(SV2AGW\)George Rossopoulos" <sv2agw@raag.org>
Date: Fri, 14 May 2004 14:07:44 +0300
X-Message-Number: 2
Hi
USB TNC will be available during May.
We had some production problems, It has a 4 Layer pcb and is surface mount.
The source code will be available so anyone can write software for it.
Among others will have also Live Update. You will be able to update the
flash on line.
More when ready..........
73
(SV2AGW)George Rossopoulos
sv2agw@elcom.gr
www.elcom.gr/sv2agw
+306932465216
George Rossopoulos
Nikanoros 59
54250,Thessaloniki
Greece
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Subject: New into APRS - what to use?
From: blairhogg@comcast.net
Date: Fri, 14 May 2004 11:27:59 +0000
X-Message-Number: 3
What recommendations does this group have for someone wanting to get into
APRS, or where on the net are good places to find info? I'v etried search
engines, and have seen many of the major sites but am still unsure about
equipment.
We have been using APRS as a side activity in our fox hunts, so that the
fox can see some of the hunters and their locations. So far we have had
only one APRS station reporting during the hunt. I would like to put in a
semi-permanent APRS station in the car so I don't have to worry about
setting it up every time, but don't know which way to go.
I have a portable GPS, an e-Trax Vista, but I'd rather not commit it to
APRS. I've seen non-display GPS receivers - Delorme Earthmate, etc., and
some assembled board units - Motorola Oncore GT+. Any recommendations for a
low-cost unit?
The TinyTrak3 looks like the best solution for the TNC, are there any
others?
What about the transmitter? The TT3 also comes packaged with a transmitter,
which lacks a receiver to prevent transmitting when the frequency is busy.
Is it better to use an HT or mobile rig? Or just not worry about the
frequency busy status?
Thanks all for your help,
Blair WB3AWI
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Subject: USB TNC Link
From: "Dakota Summerhawk" <dakotas@dotorg.org>
Date: Fri, 14 May 2004 06:46:32 -0600
X-Message-Number: 4
http://www.elcom.gr/sv2agw/tnc.htm
USB TNC for all who want to know.
Dakota
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Subject: Re: laptop (APRSdos works great!)
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Fri, 14 May 2004 09:16:24 -0400
X-Message-Number: 5
>>>"Mike Yetsko" <myetsko@insydesw.com> 5/13/04 5:48:42 PM >>>
>As I have some old DecMate laptops around here
>with color screens and 386SX processors I'd love
>to put to work.
APRSdos still runs fine on those machines. And for large areas, APRSdos
maps do not suffer the map gloat problem that is, there is so much map
clutter that you cannot easily and quickly see where the Ham assets are!
And the maps fully zoom from the coutny to the world... and it all fits on
a single floppy. (2 if you want your area maps)...
Also, APRSdos does all that APRS was designed to do
that was overlooked by most WIndows clones:
1) Displays PHG circles around all stations (option)
2) Dead reckons moving stations
3) Shows elapsed time since posit on all posits
4) Many Symbols POINT in the direction they are going
5) All maps zoom from local to world
6) Maps are crude (Focus on COMMs not streets)
7) Plots Signal strength contours for DFing by signal strength
8) Predicts FOX position from equal signal strength reports
9) Displays ambiguity circles
10) Supports ZIPLAN (hook many PC's to one TNC with zip cord)
11) Decaying periodicities on ALL packets (POS, OBJ's MSGS)
12) Auto QRM adjust for local real-time event or 24/7 grass growing
12) Velocity vectors are logirithmic
a) 0 speed still shows about a 1/4" heading vector
a) Walking speeds are easy to see (up to about 3/8" long or so)
b) 60 MPH Cars are about an inch long
c) 600 MPH airplanes are about 2 inches long
13) TRAFFIC plots lines between stations in QSO
14) SMART Acking makes for blazing QSO's
15) Range scale shown on all maps for easy reference
DOWNSIDE: No internet (APRS designed for LOCAL RF ops!) Maps are poor. But
you can make your own with the built-in utilities.. and edit any of the
existing ones.
I have about 4 old laptops in a suitcase that I can carry to an event, and
hook them all via clip leads to pins shoved in a piece of ZIP cord and have
all 4 laptops working from the same TNC (no sys-admin assist requried).
Plus, with the one floppy, I can load APRSdos on any available PC's and via
2 clip leads on their serial ports, they too can join the ZIPlan...
de WB4APR, Bob
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Subject: RE: USB TNC Link
From: "Rich Garcia" <k4gps@arrl.net>
Date: Fri, 14 May 2004 09:17:45 -0400
X-Message-Number: 6
Have any of these been produced and shipped to the US yet? I remember the
re-release announcement but never heard much else afterwards.
Rich
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Subject: Re: New into APRS - what to use?
From: "Robert Bruninga" <bruninga@usna.edu>
Date: Fri, 14 May 2004 09:31:17 -0400
X-Message-Number: 7
>>><blairhogg@comcast.net> 5/14/04 7:27:59 AM >>>
>... recommendations.. for ... APRS... as a side activity
>in our fox hunts...
The only APRS software that fully supports all DF modes is APRSdos.:
1) Plots the usual DF bearings,
2) Has auto-serial port intercfaces to Doppler systems
3) Has OMNI-DFing techniques using only signal strength reports from other
users (dont have to be APRS)
4) Has built-in OMNI-Fade-Circle technique for letting a lone driver with
NO DF gear to simply hit one key at equal signal areas and then it
computes and displays probable FOX location. Using this techinque and
S-Meter lets you almost drive (ZIG-ZAG) right to the fox. You have to
use your HT with and without antenna for the last 0.1 mile...
The power of #3 and #4 to support DFing WITH NO SPECIAL DF equipment is
worth FAR MORE than and DF gear, since it is ALWAYS available...
I have DF gear, but NEVER USE it anymore... ITs not worth the trouble
since I never have it when I need it. Yet I can use the APRS omni
techniques at any time...
APRSdos maps are crude, but DFing is not a "street" thing and assumes you
have a paper map of the area to find how to get there...
de WB4APR, Bob
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Subject: Re: laptop
From: "Jordi Costa" <bvjordi@bitsnvolts.com>
Date: Fri, 14 May 2004 15:58:28 +0200
X-Message-Number: 8
I never had problems in USB/serials that use FTDI chipsets/drivers. Seems
they make a proper usage of modem control lines.
A lot of problems with other converters when software uses modem control
lines (hardware handshaking, etc.).
Jordi
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Subject: Re: USB interface standard Was: Re: laptop
From: David L Norris <kg9ae@webaugur.com>
Date: Fri, 14 May 2004 11:10:23 -0500
X-Message-Number: 9
On Thu, 2004-05-13 at 18:10, Scott Miller wrote:
>Linux already has a real AX.25 stack. There's no reason you should have to
>mess with ttys or KISS to use a USB TNC. AGWPE does a great job of
>providing similar services for Windows. Get direct USB support in these two
>systems, eliminating the need for TNC designers to write and maintain host
>drivers, and you open the door to a whole lot of new hardware possibilities.
Linux AX.25 probably needs as much love as it can get. One of the
kernel developers commented that no "ham radio people" had spoken up at
any point during 2.6 development. The various drivers have periods
where they won't even build. Distros are simply removing them from the
kernel builds because they are unstable.
--
David Norris, ARS: KG9AE
http://www.webaugur.com/dave/kg9ae/
ICQ - 412039
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