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ZL3AI > APRDIG 21.06.03 19:28l 253 Lines 9093 Bytes #999 (0) @ WW
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Subj: TAPR Digest, Jun 14, 2/3
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: TN-204 GPS Rcvr to D700?
From: "Dave Putman" <putmandv@netscape.net>
Date: Sat, 14 Jun 2003 11:19:45
X-Message-Number: 4
I am considering a TN-204 receiver for use with my D700. Anyone have
experience with this combo? The receiver uses a SiRF-II chipset; I seem to
recall some comments regarding this chipset on the SIG, but do not remember
specifics.
Dave KG4KZZ
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Subject: APRS Voice Rptr Advisories
From: Bob Bruninga <bruninga@usna.edu>
Date: Sat, 14 Jun 2003 14:10:36 -0400 (EDT)
X-Message-Number: 5
Travelers Voice Repeaters:
To help APRS travelers this summer, digipeaters in the boonies need to
recommend (direct) the nearest WIDE-AREA VOICE repeater that is used by
thru-travelers. These recommendations should show up on the Kenwood
something like this:
+-------------+
| 146-940 |
| PL-107.3 |
| Pikes MTN |
+-------------+
And they show up under the LIST button like this:
+----------------------------+
| 1. WB4APR-9 ............. |
| 2. KB2ICI-10 ............. |
| 3. 146-940 ............. |
| 4. K4HG-9 ............. |
+----------------------------+
This alerts any through traveler where he can find activity or other
travelrs or dedicated APRS folks. These Voice Repeater Objects are
transmitted DIRECT ONLY! We do not want to see them where we cannot work
them! ALso, by being DIRECT only, they dont take up any more air time
than they need to. THey should be set to one packet every 10 minutes
(direct) so that they are timely. This is 0.0016 of channel capacity and
well worth it!
I just traveled I-81 (which goes through no cities for 600+ miles) and
without these Travelers Advisories, you are in the dark and on your own,
even though you are surrounded by mountains and always within range of at
least one such thru-travelers repeater if you just knew what it was!
These objects should not be everyone's favorite ego-peater, but simply a
pointer to that frequency most widely used by through travelers in the
area of your digi.
To put these into you KPC-3 DIGIPEATER, here's how:
LT 1 ;146-940 *111111zDDMM.HHN/DDDMM.HHW$PL-107.3 Pikes MTN
LTP 1 APOBJS
BLT 1 E 00:10:00
Notice the Frequency of the repeater is the OBJET NAME. It does not use a
"." decimal point, because these cause attached GPS's to BEEP and flash
"INVALID WAYPOINT" every time they are heard. I hope that the HYPHEN will
be acceptible to the Garmin GPS (Havent tested it yet)...
Notice also that the path is just APOBJS, and NOT APOBJS VIA WIDE or any
other such paths. These must be LOCAL packets only.
I do not want to encourage lots and lots of useless advertising on APRS,
but I do want APRS to serve the local traveler. If local information is
transmitted ONLY LOCALLY DIRECT, then it is a local issue and the local
needs can be balanced locally. Other local OBJECTS that are valuable
are the local IRLP and/or local ECHOlink nodes. Their object names
should be "IRLP1234" or "ECHO12345" and their frequencies and PL
included in the first 10 bytes of the object comment field like
"146940/123". Using that format makes them display the best on the
Kenwoods. Ignore the decimal digit of PL. Everyone's radio konws that
a PL of 107 means 107.4 (or whatever it is)...
Having VOICE ALERT (on 144.39) and these travel advisories will greatly
enhance your distant APRS traveling experience. Maybe those people who
still say "ho-humm... APRS.. whats it good for?" might notice the fun
you'll have...
p.s. The better way to output IRLP and ECHOlink objects is to use the
IRLP and ECHolink embedded software that automatically does it so that
the status is dynamic and actually represents the instantaneous state of
the node, not just some fixed-non-changing OBJECT... but that takes
another TNC and radio. Adding the nodes as just OBJECTS in the LT buffers
of an existing TNC takes NO HARDWARE AND NO SOFTWARE. Just do it.
Upgrade later to fully automatic...
de WB4APR@amsat.org, Bob
PCsat WEB page http://www.ew.usna.edu/~bruninga/pcsat.html
ISS-APRS FAQ: http://www.ew.usna.edu/~bruninga/iss-faq.html
CUBESAT Designs http://www.ew.usna.edu/~bruninga/cubesat.html
APRS LIVE pages http://www.ew.usna.edu/~bruninga/aprs.html
APRS SATELLITES http://www.ew.usna.edu/~bruninga/astars.html
MIM/Mic-E/Mic-Lite http://ssdl.stanford.edu/mims/
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Subject: Re: VOICE ALERT for Europe
From: Bob Bruninga <bruninga@usna.edu>
Date: Sat, 14 Jun 2003 14:18:48 -0400 (EDT)
X-Message-Number: 6
On Fri, 13 Jun 2003, Alex wrote:
>>If you run CTCSS-100 in Europe
>>your squelch opens up falsely sometimes due to all the 50 Hz harmonics.
>
>I see. The 2896000th harmonic of 50Hz is right on 144.800Mhz. Who
>would've thunk. And there are at least a 100 of 'em in an FM receiver's
>passband. Phew, I'm glad I don't live in Europe.
no, thats not it. The second harmonic of 50 Hz is 100 Hz, and since
almost every Home station and every digipeater in Europe runs on the AC
power mains, that means the 100 Hz is transmitted to some degree with
almost every packet.
THus, it causes all kinds of falsing if you try to use a PL or CTCSS of
100 in Europe. THus we now recommend 136 Hz for APRS Voice Alert in
Europe.
Since PL was invented in the USA, you will notice that there are no
PL tones that are any harmonic of our 60 Hz mains... (120, 180, 240
300 Hz, etc)...
de WB4APR, Bob
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Subject: Re: Better than 52 simplex
From: Bob Bruninga <bruninga@usna.edu>
Date: Sat, 14 Jun 2003 14:32:07 -0400 (EDT)
X-Message-Number: 7
Someone posted (and I will reply to the group):
>Just as a note I have tried to contact the fixed stations posting packets on
>the network with 100.0 PL. Either I get "Its my station and I can do what I
>want." Or nothing at all. Promoting this at least in the Cheyenne WY area
>for at least mobile stations is great so what do we do about the fixed
>stations that refuse to comply?
User Education!, User Education!, User Education!
On my 1600 mile round trip and QSO's with at least 6 owners of D700-'s,
NONE of them knew about VOICE ALERT. Two of them had "heard about it" but
had no idea what it meant. Somehow we are not doing a good job ad
educating people about how to use APRS...
We need to work at that.
SOmeone needs to write an ARTICLE for QST complete with PICTURES of the
front panel of the D700 or D7 showing about all these mobile techniques
for the Traveler:
1) Voice Alert
2) THRU-VOICE Rpeater objects
3) IRLP/ECHOlink objects
4) SATELLITES objects
5) WEATHER Stations
Kenwood has never fully put all this information in their advertising
photos of these radios and so 99% of HAMs still dont get it...
I'd love to write such an article, but I am outta time right now...
BOb
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Subject: Re: PIC accessory for Mobile APRS
From: Bob Bruninga <bruninga@usna.edu>
Date: Sat, 14 Jun 2003 14:35:59 -0400 (EDT)
X-Message-Number: 8
On Fri, 13 Jun 2003, Ken Patterson wrote:
>Bob, would it be correct to deduce from your posting that Kenwood will not
>have a software upgrade for the D700 as they did for the D7?
I dont know of any upgrades. I think Kenwood was planning on it, but a
down turn in the world economy and Japan in particular made it impossible
to invest in a new production. All of the Japanese MFR's have been
downsized recently... Fortunately, The D7 and D700 are some of the best
selling radios for Kenwood, so we have nothing to worry about their future
availablity..
Bob
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Subject: Re: Digis and UI-digis
From: Bob Bruninga <bruninga@usna.edu>
Date: Sat, 14 Jun 2003 14:43:56 -0400 (EDT)
X-Message-Number: 9
Do a google search for "DIGIS.TXT"
Bob
On Fri, 13 Jun 2003, Neville A. Cross wrote:
>Hello
>
>I am quite new to APRS and I am trying to share some packet nodes with APRS
>use. There won't be any problem about crowded frequency, as there are not
>that much users. My question is simple where I can read about how the digis
>and UIdigis work? Specially focused on the calls and order in which the
>repeat those calls. Also interested on how to program the unproto. By the
>way, no elmer around to ask face to face.
>
>Thanks
>
>Neville A. Cross
>YN1NCV
>Managua, Nicaragua
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Subject: Re: VOICE ALERT for Europe
From: Alex <kr1st@amsat.org>
Date: Sat, 14 Jun 2003 16:46:35 -0400
X-Message-Number: 10
Bob Bruninga wrote:
>>I see. The 2896000th harmonic of 50Hz is right on 144.800Mhz.
>no, thats not it.
Boy, and I thought it was rather obvious that I was kidding. L1AR could
have written this in his annual QST article.
Sorry Pete and Bob.
73,
--Alex KR1ST (using a center loaded woofhong on 144.39)
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