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ZL3AI > APRDIG 31.07.03 18:28l 241 Lines 8541 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jul 28, 2/2
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: APRS -> NMEA gadget?
From: "Scott Miller" <scott@opentrac.org>
Date: Mon, 28 Jul 2003 12:55:11 -0700
X-Message-Number: 9
Something Andy said about using Street Atlas gave me an idea. Now, I've
seen the antitracker device for generating waypoints based on APRS signals,
but how about a pseudo-GPS device that listens for a specified callsign, and
generates NMEA data - possibly using dead reckoning between packets - for
input into non-APRS aware programs and devices? Has it been done before?
Scott
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Subject: TEST MESSAGE
From: Gonzales Andy <agonzales@arc.nasa.gov>
Date: Mon, 28 Jul 2003 13:03:55 -0700
X-Message-Number: 10
Other messages were reflected due to "HTML" content ?
--
Andy Gonzales
NASA / Ames Research Center
Moffett Field, CA 94035-1000
Bldg. N-244, Rm. 240
MS 244-19
agonzales@arc.nasa.gov
650-604-0309
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Subject: Looking for Mike K4MQF
From: "Eric Christensen" <kf4otn@earthlink.net>
Date: Mon, 28 Jul 2003 16:04:04 -0400
X-Message-Number: 11
Hey, can anyone give me a good email address for Mike K4MQF in Virginia?
His @arrl.net account does not work.
Thanks,
Eric KF4OTN
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Subject: LAPTOPS, PATHS, AND TRAVEL - 3 of 3
From: Gonzales Andy <agonzales@arc.nasa.gov>
Date: Mon, 28 Jul 2003 15:33:01 -0700
X-Message-Number: 12
Although I was able to see all of the familiar APRS stations in the bay
area from SLO, there were only a couple of stations running down there.
Voice traffic on the local 2 m repeaters was also pretty minimal. I only
made two contacts, but I'm still a rookie.
As far as batteries are concerned, I have experience with flight payloads
for my Mars Airplane project that require differing voltages for various
components. You can either build a tapped pack which stresses the "bottom
cells" or build serveral packs of varying voltages. We use Li-SO2 batteries
but these are not re-chargeab;e. If you use Ni-Cads or Ni-MH, like we did
for high power motors, there are chargers available that handle from 2 -24
cells (1.2 V per cell). These charges are smart enough to cutoff to avoid
overcharging and know how many cells it is charging. You have to set the
type and the charging rates. Don't charge too fast unless its an emergency.
If you have a tapped pack, the "top cells" will be discharged less than the
others in service. In this case, the charger will cut-off when the tops
cells become charged, leaving the "bottom cells" undercharged. It is not
good to have mismatched cells in the same pack. Graupner, Astroflight,and
Schulze make these chargers -- look under radio controlled model aircraft
and cars. These chargers run off your car battery, directly connected or
through the power port.
Oops, my rig just got a packet through about 22 minutes ago (its 11:57 AM
now) - But my status text is what I had up yesterday, I changed it this
morning.
73
--
Andy Gonzales
NASA / Ames Research Center
Moffett Field, CA 94035-1000
Bldg. N-244, Rm. 240
MS 244-19
agonzales@arc.nasa.gov
650-604-0309
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Subject: Question
From: Harry Mills <ab6kf@adams.net>
Date: Mon, 28 Jul 2003 18:11:20 -0500
X-Message-Number: 13
We are currently testing a digi that will go on a 325 foot tower. It is at
a friends house about 4 blocks from my qth. I am running aprsplus sa and I
hear it all the time. My aprs web server hears it. For some reason it is
not getting out to the internet on a consistant basis. When I use findu it
can be as much as 20 hours old.
Any one have any ideas or suggestions ??
Thanks
Harry Mills AB9KF
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Subject: Re: LAPTOPS, PATHS, AND TRAVEL - 3 of 3
From: Bob Bruninga <bruninga@usna.edu>
Date: Mon, 28 Jul 2003 19:14:24 -0400 (EDT)
X-Message-Number: 14
On Mon, 28 Jul 2003, Gonzales Andy wrote:
>Although I was able to see all of the familiar APRS stations in the
>bay area from SLO, there were only a couple of stations running down
>there. Voice traffic on the local 2 m repeaters was also pretty
>minimal. I only made two contacts, but I'm still a rookie.
Were you running APRS Voice Alert?
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Subject: Re: Question
From: Mark Earle <wa2mct@mearle.com>
Date: Mon, 28 Jul 2003 18:30:51 -0500
X-Message-Number: 15
(You may know some of this, I am just going over the possiblities that come
to mind)
1. Get the RF right first.
a. Check transmitter power, receiver sensitivity.
b. Correct interfacing of the receiver. Sometimes,
you need to change from speaker out to
discriminator out. It would be better to
do this, and run data-carrier-detect (DCD)
c. Check deviation, assuming tx frequency is correct
3.25 to 3.5 is where you want it.
2. Check for humm, etc. on the signal. Look at it as received
on a spectrum analyzer or service monitor with scope.
3. Verify your "TXD" is set to a long enough value. TXD does
two things. It asserts a delay in your transmitter,
to allow it to come to full power and be stable.
It also is what gives some "blank" signal to open
the squelch or audio path on the receiver at the
other end. So TXD is a compromise setting depending
on the radios you are using in a given network.
4. Make sure your PL is turned off, if the radio has this
capability.
Just curious, what brand tnc and what radio are you using for the digipeater?
) ) 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
----------------------------------------------------------------------
Subject: Re: Question
From: Tim Schall <ka7pbi@fortgirlfriend.ampr.org>
Date: Mon, 28 Jul 2003 16:50:16 -0700
X-Message-Number: 16
This one got me when I first put the SEA digi into operation. Dried out
filter caps in a surplus power supply killed about half the packets.
On Monday 28 July 2003 16:30, Mark Earle wrote:
>2. Check for humm, etc. on the signal. Look at it as received
> on a spectrum analyzer or service monitor with scope.
Assuming the radio link works and you're hearing pretty much every packet the
thing transmits at your local monitoring site I'd tend to be suspicous of the
igate software. Take a good look at all your config files and such and make
sure you're not actually sending the posit to the internet from the igate
server and not digipeater. Make sense?
In other words, some igates can be set up to only dump a position to the
internet every so many hours. If your igate is set up in this manner it
might be that the igate itself is sending the last known position of your
digi to the internet rather than the digi's transmitted packets doing that
work.
Good luck.
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Subject: RE: Question
From: "AE5PL Lists" <HamLists@ametx.com>
Date: Mon, 28 Jul 2003 19:07:32 -0500
X-Message-Number: 17
Is the IGate your IGate? If so, is it your APRS+SA? What server and port
are your connecting to if it is your IGate? If you are using APRS+SA as an
IGate, make sure you have turned on both "Gate TNC data stream to Internet"
and "Gate Messages from Internet to Local RF Stations".
What is the digi call so we can look at the packets? Can you copy a recent
posit to the SIG so we can look at it?
73,
Pete Loveall AE5PL
pete@ae5pl.net
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Subject: Re: 30 Meter Heard List from West Coast
From: "Earl S. Garber" <n3eg@teleport.com>
Date: Mon, 28 Jul 2003 20:40:39
X-Message-Number: 18
Is there any good reason for me to be on 10.151? Not being sarcastic here
at all...it's just that I can't send weather with WinAPRS because it
defaults to the VHF settings, and I don't seem to be ECHOing anything
valuable to anyone. I've never heard a single packet on 20 meters either.
Anybody want to trade an old KPC3+ for my MFJ-1270B with tuning indicator?
....N3EG
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