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ZL3AI > APRDIG 09.05.03 09:52l 258 Lines 9291 Bytes #999 (0) @ WW
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Subj: TAPR Digest, May 06, 3/4
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: Tiger map files question
From: Mark Sproul <msproul@jove.rutgers.edu>
Date: Tue, 6 May 2003 14:27:49 -0400
X-Message-Number: 20
The tiger maps are very large, I am running on a 500 meg machine with
lots of maps downloaded (over 1000 counties) and it works fine.
If you have less than 128 megs of ram, you will probably only be able
to handle a few small counties.
There are counties in California that are almost the size of NJ,
these take LOTS of memory.
I would recommend that unless you are going to only use 1 or 2 counties
that you not try it on a machine with only 64 megs of memory. 256 meg
should be comfortable and I have been doing all of my development and
testing on a 1 ghz 512 meg Dell system.
Mark
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Subject: Cheap GPS solutions
From: "Julian White" <julian@privateasylum.com>
Date: Tue, 6 May 2003 20:54:46 +0200
X-Message-Number: 21
Hello everyone.
I think that I have something worthy to offer the group.
I see lots of people asking for cheap gps units and ideas. I even see gps
output string converters and I smile and think to myself how silly it all
sounds. Has anyone else thought about using a simple gps module and
mounting it on a pcb yourselves?
Well I have made a homebrew gps unit for about ?50 (euros).
www.privateasylum.com/DSC00133.JPG is a picture showing the proto module
my buddy (OH8HSA) and I (OH8GEJ-KB9YXM) built. The layout will change but it
is very much like the picture.
We have built two of them so far and really have no plans to build up more
as these met our needs.
Mine is installed on my Honda Transalp with callsign hb9tmj-2 as I am
currently working in Switzerland.
It works extremely well and doesn't mind getting tosses around my pannier
box with the thd7 attached. The antenna is a 8 turn helix (around a #2
pencil) paper clip.
The pcb we used was from a fastrax evaluation kit but we designed our own
smaller pcb which makes the overall size when complete about the size of a
7mm think credit card.
Fastrax is not the only company that offers GPS modules there is also
www.motorola.com/ies/GPS/pdfs/m12.pdf
http://www.commlinx.com.au/gps_oem.htm
http://www.tycoelectronics.com/prodnews.asp?ID=242
http://www.fastrax.fi
and many others.
Addmittedly youll need low heat ironing skills and/or the ability to screen
your own pcb. We used all surface mount components in our gps units. (which
is possible at home)
Im thinking of modifying my gps and including a lithium battery and solar
panel to keep it charged. The ThD7 gets its power straight from the
Transalp. The project really is fun and by building up your own pcb you can
influence the overall size and configuration as we did.
Im a tech class ham and If I have the skills to build up the external parts
around a güs core any old timer can build up a micro gps masterpiece.
try it.
73's
Julian
Its consists of a Fastrax GPS module.
Trax02 GPS receiver module is roughly the size of a stamp, 26x26x4.7mm. The
small foot print combined with ultra-low power consumption and low cost make
it feasible to apply GPS positioning technology anywhere it is needed.
Tiny PCB form factor 26 mm x 26 mm x 4.7 mm (including RF shield and system
connector).
Ultra-low power consumption 100 mW @ 2.7 V in continuous operation.
Based on two-chip GPS solution, uN8021 RF chip and uN8031 Baseband chip.
uN8021 RF Front end chip in 20-pin QLP-package.
uN8031 Baseband Processor chip in 144-pin BGA package.
Modular ASiS (Application Specific Integrated System) architecture in
0.35uCMOS technology.
Integrated iDC direct-conversion, RF front-end.
12 channel parallel receiver.
Dedicated search engine for extremely fast signal acquisition.
Proprietary, ultra-low power, 32MIPS integrated 16-bit DSP-core.
RISC-like programming under Pre-emptive Real Time Operating System Control
(VSDSP RTOS).
On-chip memory (X/Y-Data and Program SRAM).
Low power real-time clock.
Versatile low profile system connector including RF and I/O.
16-bit GPIO-port.
Dual UART.
SPI-interface.
Dual Pulse Measurement inputs.
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Subject: Voice Alert
From: "Wes Johnston" <wes@johnston.net>
Date: Tue, 6 May 2003 15:00:21 -0400
X-Message-Number: 22
I've run into two stations recently who were running voice alert, but who
appearantly had their volume down. It's easy to do because you probably had
your volume on the data side of the d700 down when you turned on the 100hz
PL tone.
So, if you are runnning a d700 with voice alert on the data side, please
turn your volume up 1/2 way.
Wes
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Subject: Re: Voice Alert
From: Bob Bruninga <bruninga@usna.edu>
Date: Tue, 6 May 2003 15:25:07 -0400 (EDT)
X-Message-Number: 23
On Tue, 6 May 2003, Wes Johnston wrote:
>So, if you are runnning a d700 with voice alert on the data side, please
>turn your volume up 1/2 way.
And when you call someone on voice alert, you must say "ON VOICE ALERT"
or the other guy just thinks he heard you on the B side and will answer
you, on side B and wonder where you went...
bob
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Subject: Re: WAS: KCAPRS Site... IS GROWTH..
From: "Dave Sloan" <desloan@earthlink.net>
Date: Tue, 6 May 2003 13:46:51 -0600
X-Message-Number: 24
Hello,
TAPR already has a sig
http://www.tapr.org/cgi-bin/lyris.pl?enter=ham-80211&text_mode=0 for 802.11
usage. Not a busy sig but several interesting discussions since I have been
subscribed. Lots of discussion on Part 97 with it, and how to deal with
non-hams.
Follow the link above and subscribe to the mail list and get involved
with this area of HAM and 802.11 technology.
73,
Dave N0EOP
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Subject: Another question from old newbie
From: "Howard Coleman" <n6vdv@onemain.com>
Date: Tue, 6 May 2003 13:18:34 -0700
X-Message-Number: 25
Been reading the messages and see "d700" mentioned many times. May I ask
what it is? My suspicion is that it is a transceiver.
Thank you
Howard Coleman N6VDV
n6vdv@n6vdv.org
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Subject: Re: Another question from old newbie
From: "Julian White" <julian@privateasylum.com>
Date: Tue, 6 May 2003 22:30:12 +0200
X-Message-Number: 26
this might answer your quesitons.
http://www.kenwood.com/i/products/info/amateur/tm_d700ae.html
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Subject: Need help w/ a TNC and WinAPRS
From: "Michael Amos" <kg4nds@bellsouth.net>
Date: Tue, 6 May 2003 17:04:43 -0400
X-Message-Number: 27
I need help connecting a Kantronics KAM all mode TNC to a Radio Shack
HTX-212 and running WinAPRS 2.7.0.
The connection that I've made will communicate, (xmit and rcv), using packet
on VHF but will only rcv while running WinAPRS.
I've got to have this working this Sat., May 10, for an APRS demo station
for new/potential HAMS.
Detailed instructions would be appreciated. The docs are that come w/
WinAPRS are not clear on this point and are even a bit confusing.
Section from Documentation:
a.. Dual band TNCs such as the PK-900, DSP-2232 and KAM PLUS need to be used
on the HF (Dual) port and not on the VHF port. This is true even if you are
using VHF only.
The Software won't transmit on HF or VHF port. I know this has to be a
cockpit problem and I might figure it out in time but due to time
limitations I've got no choice but to ask for help.
Thanks
Mike - KG4NDS
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Subject: RE: Need help w/ a TNC and WinAPRS
From: "Michael Amos" <kg4nds@bellsouth.net>
Date: Tue, 6 May 2003 17:51:57 -0400
X-Message-Number: 28
Thanks again for all the help, got email as to how to fix. Seems to be
working now except for minor routing issue (fixable).
Mike
KG4NDS
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Subject: GPS Antenna
From: Glenn Little <glennlittle@bellsouth.net>
Date: Tue, 06 May 2003 19:11:38 -0400
X-Message-Number: 29
I have a used MACOM GPS antenna. It is model number 3396-8010-0021. MACOM
tells me they have no data on this antenna. The antenna is three inches in
diameter and 1/2 inch thick. It is fed with a type N connector that is
mounted off center. This would possibly suggest a patch antenna. When I
measure the resistance from center conductor to shell on the connector, I
get 56 Ohms. Can anyone tell me anything about this antenna? With the
resistance that I measure, I do not want to connect it to a good GPS
receiver until I know more about the antenna. Possibly the antenna is bad.
Any help and/or advise appreciated.
73
Glenn
WB4UIV
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Glenn Little QCWA LM 28417
Amateur Callsign: WB4UIV wb4uiv@amsat.org AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) EC Berkeley County ARRL TAPR
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