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ZL3AI > APRDIG 20.07.03 07:03l 256 Lines 9161 Bytes #999 (0) @ WW
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: SMALL 144MHz Transmitter
From: julian@privateasylum.com
Date: Thu, 17 Jul 2003 11:17:19 -0500 (CDT)
X-Message-Number: 8
>>Can anyone advise of where I could find a small (VERY SMALL) 144MHz
>>transmitter
I forgot to mention one thing Eric.
Much of the ideas we have been working on have been to use an Animal
tracker type transmitter which are easily found and modified for VHF. The
problem is the cost. Smaller is more expensive. Even buying parts to build
up such transmitters ourselves ws costly.
Not to be put off. Im sure there is a solution and Im sure we will find
it. If some others on the list have some ideas, I would be happy to her
about them.
My goal was to make an entire tracking solution, transmitter, tiny trak
adn gps all in packed in a package the size of a pack of smokes.
Comments?
julian
DL/OH8GEJ
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Subject: APRSWORLD.NET
From: "Dave Thege" <dthege@conpoint.com>
Date: Thu, 17 Jul 2003 11:50:02 -0500
X-Message-Number: 9
Is there a problem with APRSWORLD web page. When I submit my home station
call (N0XBN-5), it comes back as the last time it received it as almost a
month ago when I was using that call on the D-7.. When I check FINDU it's
current. My digi call (N0XBN) shows up as current on APRSWORLD.
Dave N0XBN
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Subject: W0EEE-3
From: "Ken Cechura" <kcechura@umr.edu>
Date: Thu, 17 Jul 2003 11:59:48 -0500
X-Message-Number: 10
I regret to inform everyone, but it looks like W0EEE-3 is going to have to
go offline for at least the remainder of the month. It is interfering
(getting into) the W0EEE voice repeater on 145.450 (input: 144.85). We
have cavities in place on the repeater, but not the digi. It IS possible
that the cans are not quite tuned right, but their main purpose is to notch
145.450. Since I can't afford another set of VHF cans, and have no place
to move the digi (and reducing the digi's power isnt helping) I will
probably be pulling it offline this coming week.
73
Ken, KC9UMR
President, W0EEE
Trustee, KF9ART
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Subject: Re: APRSWORLD.NET
From: James Jefferson <jj@aprsworld.net>
Date: Thu, 17 Jul 2003 12:05:19 -0500
X-Message-Number: 11
Hi Dave,
I'm looking into this. It appears that the aprsworld parser cannot decode
you packet. Perhaps you changed formats on the date which it was last in
the database.
APRSdec decodes it with the following information:
N0XBN-5>APU25E,N0XBN,N0ZQR*,WIDE,qAR,WB0WNX:=/97Uu5pBD- BWelcome to Norfolk,
Enjoy
ur stay. {UIV32N}
APRS Data Type= Posit w/o time. With APRS
Lat= 42 deg 01.85 min N Long= 97 deg 25.12 min W
Icon= House QTH VHF Overlay= (none)
If that is correct then I will start investigating what's not working.
Thanks for bringing this to my attention.
-Jim KB0THN
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Subject: Re: W0EEE-3
From: Bob Bruninga <bruninga@usna.edu>
Date: Thu, 17 Jul 2003 13:32:25 -0400 (EDT)
X-Message-Number: 12
On Thu, 17 Jul 2003, Ken Cechura wrote:
>... W0EEE-3 is going to have to go offline... It is interfering
>(getting into) the W0EEE voice repeater on 145.450 (input: 144.85). We have
>cavities in place on the repeater, but not the digi. It IS possible that
>the cans are not quite tuned right, but their main purpose is to notch
>145.450.
Yes, that was a known problem when we moved the North American Frequency
to 144.39. Because ALL 145 MHz voice repeaters have cavities, BUT they
are wide open below their notch filters. THus an APRS digipeter cannot be
co-located with any 145.XXX MHz voice repeater without adding a whole new
set of cavities to the voice repeater receiver.
Most people dont realize this, but the RX cavities for a 145 MHz voice
repeater have over 100 dB of notch attenuation, but below that frequency
they have very little attenuation. At 144.39 then only provide maybe 10
dB or so of attenuation..
Bob, WB4APR
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Subject: Re: APRSWORLD.NET
From: "Dave Thege" <dthege@conpoint.com>
Date: Thu, 17 Jul 2003 12:36:05 -0500
X-Message-Number: 13
I had been experimenting with the D-7 at that time and since switched the
call to the base station. The packet you show below is correct. It would be
the beacon packet.
Dave N0XBN
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Subject: Re: TinyTrak 3 and stuff
From: "Daniel H. Brown" <brown@brauhausdc.org>
Date: Thu, 17 Jul 2003 13:37:03 -0400 (EDT)
X-Message-Number: 14
On Thu, 17 Jul 2003, Gregg G. Wonderly wrote:
>>I'll be hiking in Sequoia and Kings Canyon NPs so hopefully I'll have all of
>>the kinks in my setup ironed out before then. Any suggestions on
>>backpack-friendly antennas? My stubby duck seems kind of inadequate, but a
>>1/4 wave whip seems a bit fragile.
>
>If the antenna is connected to the HT directly, you'll be using the HT's
>groundplane. If your not holding it and providing the rest of the grounding,
>I'd suggest that a piece of coax to a 5/8 wave would give you much better
>coverage. Perhaps you can bring both, and only cable up the 5/8 if you need
>it?
You could also try a "tiger tail" -- basically a 1/4 wavelength wire with
an appropriate sized loop connector crimped onto one end. This goes over
the BNC or SMA connector on the rig, and is held down when you connect the
Ducky antenna onto rig. Instant counterpoise.
--
Dan Brown
brown@brauhausdc.org
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Subject: Re: SMALL 144MHz Transmitter
From: "Daniel H. Brown" <brown@brauhausdc.org>
Date: Thu, 17 Jul 2003 13:48:07 -0400 (EDT)
X-Message-Number: 15
On Thu, 17 Jul 2003 julian@privateasylum.com wrote:
>Date: Thu, 17 Jul 2003 11:17:19 -0500 (CDT)
>From: julian@privateasylum.com
>To: TAPR APRS Special Interest Group <aprssig@lists.tapr.org>
>Subject: [aprssig] Re: SMALL 144MHz Transmitter
>
>>>Can anyone advise of where I could find a small (VERY SMALL) 144MHz
>>>transmitter
>Iforgot to mention one thing Eric.
>Much of the ideas we have been working on have been to use an Animal
>tracker type transmitter which are easily found and modified for VHF. The
>problem is the cost. Smaller is more expensive. Even buying parts to build
>up such transmitters ourselves ws costly.
>
>Not to be put off. Im sure there is a solution and Im sure we will find
>it. If some others on the list have some ideas, I would be happy to her
>about them.
What about: http://www.alinco.com/Products/DJC5T.shtml
>My goal was to make an entire tracking solution, transmitter, tiny trak
>adn gps all in packed in a package the size of a pack of smokes.
>
>Comments?
Take a look at the Deluo GPS's.
--
Dan Brown
brown@brauhausdc.org
----------------------------------------------------------------------
Subject: Re: TinyTrak 3 and stuff
From: Doug McFadden <kc7imr@orednet.org>
Date: Thu, 17 Jul 2003 12:17:48 -0700 (PDT)
X-Message-Number: 16
On Thu, 17 Jul 2003, Gregg G. Wonderly wrote:
>>I'll be hiking in Sequoia and Kings Canyon NPs so hopefully I'll have all of
>>the kinks in my setup ironed out before then. Any suggestions on
>>backpack-friendly antennas? My stubby duck seems kind of inadequate, but a
>>1/4 wave whip seems a bit fragile.
>
>If the antenna is connected to the HT directly, you'll be using the HT's
>groundplane. If your not holding it and providing the rest of the grounding,
>I'd suggest that a piece of coax to a 5/8 wave would give you much better
>coverage. Perhaps you can bring both, and only cable up the 5/8 if you need
>it?
You might try the old "twin lead" J-Pole??? Hang it in a tree in camp,
dangle it from your backpack on the move? 5/8 wave and NO groundplane
required!
Doug/KC7IMR
----------------------------------------------------------------------
Subject: Re: TinyTrak 3 and stuff
From: "Matt Werner" <kb0kqa@arrl.net>
Date: Thu, 17 Jul 2003 14:33:50 -0500
X-Message-Number: 17
----- Original Message -----
From: "Scott Miller" <scott@home.miller.org>
To: "TAPR APRS Special Interest Group" <aprssig@lists.tapr.org>
Sent: Thursday, July 17, 2003 12:35 AM
Subject: [aprssig] TinyTrak 3 and stuff
>Now my main complaint is power. Got batteries in the HT, batteries in the
>GPS receiver, and a battery hanging off the TT3. Does anyone have an
>example of a really slick, integrated system they've built using the TT3 and
>a Garmin GPS? Any suggestions for running the GPS without shelling out $xx
>for a 12v to 3v auto adapter?
Take a look at www.pfranc.com - they sell Garmin cables and adapters. I am
currently using a couple of different cables.
I'm sure there are better power solutions out there, but you'll find the 3v
auto adapter with the GPS flat-plug (for example) for about $xx (pn ePC6).
I bought a similar one that wasn't coiled, cut the cable and inserted a DB-9
for data to a TT or HamHUD.
73 - Matt
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