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ZL3AI > APRDIG 25.04.03 09:14l 221 Lines 9291 Bytes #999 (0) @ WW
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Tuesday, April 22, 2003.
1. Re: Predatory Packets
2. Re: Recommended Standalone TNC for APRS
3. Re: software to track aprs equiped buggy
4. Re: TNC connector
5. RE: a few basic questions....
6. Re: Been reading the posts and have a question
7. Re: WinAPRS & UTM Coordinates system
8. APRS in a mobile-IP enviroment
9. RE: a few basic questions....
10. RE: a few basic questions....
11. Re: WinAPRS & UTM Coordinates system
12. RE: a few basic questions....
13. Re: WinAPRS & UTM Coordinates system
14. Re: WinAPRS & UTM Coordinates system
15. Re: Recommended Standalone TNC for APRS
16. Re: Predatory Packets
17. RE: a few basic questions....
18. Re: Predatory Packets
19. Re: Digi bulk retransmits again
20. Re: Predatory Packets
21. Re: Predatory Packets
22. Re: Predatory Packets
23. Re: Predatory Packets
24. New Earthmate USB ~ Will Work
25. Re: Predatory Packets
26. Re: pocketAPRS and HandEra 330
27. Re: Radio SHack/DeLorme GPS Unit on CLEARANCE
28. Re: Predatory Packets
29. Re: Radio SHack/DeLorme GPS Unit on CLEARANCE
30. Re: Radio SHack/DeLorme GPS Unit on CLEARANCE
31. MIC-E mode on kenwood d700
32. Re: Predatory Packets
33. Re: MIC-E mode on kenwood d700
34. Re: TNC connector
35. Re: Predatory Packets
36. Re: MIC-E mode on kenwood d700
37. A bad feeling...
38. Re: A bad feeling...
39. Re: MIC-E mode on kenwood d700
40. Re: MIC-E mode on kenwood d700
41. Re: Deluo GPS WAS: Radio SHack/DeLorme GPS Unit on CLEARANCE
42. RE: A bad feeling...
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Subject: Re: Predatory Packets
From: "Wes Johnston" <wes@johnston.net>
Date: Tue, 22 Apr 2003 00:02:59 -0400
X-Message-Number: 1
I can't tell you how many times I've given an APRS demo to some NWS office
or public service people and said how great it was that you could create an
object and it apear on everyone's screen within seconds. And show them how
great it was that if their station failed, someone could click on the object
and move it, only be be met with disapointment from them... it seems that
NWS people dont like the idea of someone moving "their" funnel cloud. What
we need is a way to authenticate the source of the info so that the clients
don't allow (accept/ display) unauthorized posit changes in objects.
I think perhaps a better solution would be to have the client software
display a list of all stations who had transmitted an object with the same
name when you hooked it (or double clicked). You, the end user would select
a series of check boxes which indicated which sources of this object where
considered reliable. Just because those objects are on the air, doesn't
mean that your client software has to display them. You could select to
plot only ANA from the known good source, and not N4BAD or KD4LID's
representations of ANA. (are those real callsigns??, hoping not to pick on
anyone too badly) ;-) In this way, not just storms, but hey, how many WATER
trucks, or POLICE1, or RUNNERs are there at any one time?
Wes
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Subject: Re: Recommended Standalone TNC for APRS
From: WA8LMF2@aol.com
Date: Tue, 22 Apr 2003 00:11:45 EDT
X-Message-Number: 2
In a message dated 4/21/2003 12:17:44 PM Pacific Daylight Time,
Scott.Miller@vandenberg.af.mil writes:
>So now my question is this: Can anyone recommend a good PC-based
>oscilloscope, or would I be better off watching eBay for a used HP or Tek
>'scope?
>
>Scott
>N1VG
You might want to give the freeware audio tools suite WaveTools a try. This
bundle includes a dual-trace scope, audio function generator, AC VTVM/VU
meter, and audio spectrum analyser. They all use the standard PC sound card.
I've found them very useful for testing freq response and modulation
sensitivity of radio transmitters, generating de-emphasis curves of FM
receivers, testing soundcard interfaces, etc. Although they were written
for Win 3.x, these programs work just fine in Win 98 and 2K.
I have these freeware utilties, originally distributed as a bunch of loose
files in a zip file, packaged into a full-blown Win32 installer (that makes
a directory and fills it, creates a Start Menu group, and makes desktop
shortcuts) on my website. Go to:
http://members.aol.com/miscinfo
Click through the link to the files collection and look for the file
WaveTools.exe .
Stephen H. Smith wa8lmf @ 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: software to track aprs equiped buggy
From: WA8LMF2@aol.com
Date: Tue, 22 Apr 2003 00:24:11 EDT
X-Message-Number: 3
In a message dated 4/21/2003 6:44:53 PM Pacific Daylight Time,
chow@eng.usf.edu writes:
>I am setting up an APRS tracking device for a "Mini-Baja" and would like
>to have software on the recieving end be able to plot a continuous line of
>where it has been tracked.
APRSplus will do this IF the race is going to be in the US. [ APRSplus uses
Delorme Street Atlas Ver 9.0 or earlier which only covers the US. ]
If the mobile does a good job of smart beaconing ( transmitting whenever it's
direction changes or has traveled x distance), the resulting black track line
drawn on top of Street Atlas is excellent, and agrees with the roads in the
Street Atlas database very closely.
APRSplus itself, running in the mobile, does a very good job of smart
beaconing if you want to put a laptop in the car, --or-- one could use a
TinyTrak III in the car (Also does smart beaconing).
Stephen H. Smith wa8lmf @ 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: TNC connector
From: WA8LMF2@aol.com
Date: Tue, 22 Apr 2003 00:54:49 EDT
X-Message-Number: 4
In a message dated 4/21/2003 6:58:22 PM Pacific Daylight Time,
joe@dellabarba.com writes:
>I believe that the FT-1500 has a 6 pin DIN
This DIN connector, commonly but misleadingly labled "DATA" or "PACKET", is
now standardized by most of the Japanese ham mfrs. The connections on this
connector are actually AUDIO and PTT.
The connector's contacts are:
o fixed-level de-emphasized (and usually squelched) RX audio
o raw discriminator audio (in FM rigs)
o transmit audio (some rigs have menu selections to route this either
through the mic amp channel for 1200 baud AFSK, or DC-coupled
directly to the modulator for 9600 direct FSK)
o PTT keying for transmit control
o RX squelch status (typically 0/5 VDC)
The TX and RX audio levels are more like home audio "line level" (i.e.
100-300mV) rather than the 5-10mV sensitivity of the typical "MIC" input.
This makes them a perfect match level-wise for direct (or 1:1
transformer-coupled) connections to a computer soundcard. This connector
makes the perfect connection point for EchoLink/IRLP interfaces as well as
TNCs and soundcards.
Some of the rigs I am aware of that have this connector are:
Yaesu FT-1500 2M basic mobile
Yaesu FT-847, FT-100 and FT-817 "dc-to-light" HF/VHF/UHF all-modes
Kenwood TM-V7 and TM-G707
Kenwood TM-D700 (Yes it has this audio in/out connection for an
EXTERNAL tnc or soundcard interface along with it's internal TNC.
The MiniDIN-6 connections follow the selected band along with the
mic)
Kenwood TM-261 and higher FM monobanders
Icom IC-706
Many other recent radios also have this connector which is the identical
connector used on PCs for PS/2 keyboard and mouse connections. PS/2
keyboard/mouse extension cords will work to extend the reach of this jack (or
supply a cable harness with molded plug by cutting off the female plug from
one end of the cable.)
Larger Kenwoods (TS-440 / 940 / 711 / 811 / 450 / 690 / 570 / 2000 etc) all
have a 13-pin DIN connector which carries the same signal levels. I have made
adapters from the goofy 13-pin full-size DIN to the standard MiniDIN-6 by
connecting the leftover female MiniDin cable ends mentioned above, to the
DIN-13 connectors provided with these radios. I can then connect soundcard
interfaces, TNCs, etc with the same cable assys used on all the other radios
mentioned above.
An annotated diagram of the pinout of this connector is on my website at:
http://members.aol.com/wa8lmf/miscinfo
Click through the link to the file collection and look for the file:
MiniDIN6-PS2.pdf
Stephen H. Smith wa8lmf @ 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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