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ZL3AI > APRDIG 02.08.03 10:15l 172 Lines 6003 Bytes #999 (0) @ WW
BID : 1718-ZL3AI
Read: GUEST
Subj: TAPR Digest, Jul 30, 2/2
Path: DB0FHN<DB0RGB<OK0PPL<DB0RES<ON0AR<IK1ZNW<ZL2TZE<ZL3VML
Sent: 030801/1237Z @:ZL3VML.#80.NZL.OC #:5567 [Chch-NZ] FBB7.00i $:1718-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: RE: PK-232
From: <BobDonnell@arkalmus.com>
Date: Wed, 30 Jul 2003 10:12:17 -0700
X-Message-Number: 8
Hi Harry, Pete, and all
In the PK-232, if the AEA command BBSMSGS is set to ON, the PK-232
firmware is designed to emulate TNC2 behavior. This applies to
monitored packets. It was originally designed to allow AEA products to
be used with packet PBBS software, back in about 1988.
73, Bob, KD7NM - AEA customer service, 1/90-4/94
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Subject: Digitraveler power
From: "Scott Miller" <scott@opentrac.org>
Date: Wed, 30 Jul 2003 10:35:52 -0700
X-Message-Number: 9
Has anyone come up with a good power supply solution for the Digitraveler
GPS to run it from 12 volts? I'd really rather not use a multi-tapped
battery pack. I'll probably just use a 7806 voltage regulator. It runs on
3 AAA batteries, though, which means it's also capable of taking a 4.5 volt
input. I haven't really looked at the board to see what it's doing with the
6 volts and the 4.5 volts. Might it be more efficient to run it at 4.5?
Also, what's the possibility of relocating the patch antenna? What kind of
feedline would you use, and will it work without the PCB as a ground plane?
Or could it be used with a more efficient external antenna? I might mount
an antenna in or on top of my flight helmet - I've already got a wiring
harness for the radio that runs between the helmet and my paraglider
harness, one more cable shouldn't matter. The kevlar helmet shouldn't
attenuate the signal too much, should it?
Scott
N1VG
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Subject: RE: Digitraveler power
From: "Dan Edwards" <yedian@tds.net>
Date: Wed, 30 Jul 2003 13:29:4
X-Message-Number: 10
It looks like the Digitraveler GPS uses a bridge rectifier on the incoming
power leads. That makes it immune to incoming power polarity problems. The
2 diode drops from the incoming 6 volts running through the bridge brings
the voltage down to about 4.5 volts which matches the built-in 3 AAA
battery power pack.
Dan
AG4YU
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Subject: KAM XL init
From: "Scott Weis" <sweis@telcordia.com>
Date: Wed, 30 Jul 2003 16:04:24 -0400
X-Message-Number: 11
Can anyone out there send me the init for a KAM XL for use with WinAPRS?
Thanks,
Scott
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Subject: Re: Digitraveler power
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Wed, 30 Jul 2003 15:07:51 -0500
X-Message-Number: 12
At 12:35 PM 7/30/2003, Scott Miller wrote:
>Has anyone come up with a good power supply solution for the Digitraveler
>GPS to run it from 12 volts?
I guess that begs the question why not just buy a GPS engine that runs on
12 volts and requires no machinations to get it to output NMEA data? We
routinely see such products available new for $70 to $80...
It seems to me people are expending way more than the $25 they saved - on
time, materials, and effort in the conversion process.
73,
Mark
KC7BXS
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Subject: Re: Digitraveler power
From: "Scott Miller" <scott@opentrac.org>
Date: Wed, 30 Jul 2003 13:44:54 -0700
X-Message-Number: 13
That's $25 saved, times three units... and a 7806 regulator is about 60
cents. And I LIKE tearing things apart and making them do things they
weren't intended to do. =]
Plus, I've got plenty of projects intended to run on 5 or 6 volts.
Regulating 12 volts down to 6 or 4.5 is a lot easier than using a DC-DC
converter to get 12 volts from 5.
Speaking of power, I've got pretty much everything converted to the
connectors-which-must-not-be-named. For running multiple devices from a
single source, I'd like to stack a few together vertically and jumper them
together. Mechanically it seems to work great. Is such a distribution
block common practice? Any reason I shouldn't do it?
Scott
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Subject: Re: Digitraveler power
From: "Mark Fellhauer" <sparkfel@qwest.net>
Date: Wed, 30 Jul 2003 16:18:13 -0500
X-Message-Number: 14
At 03:44 PM 7/30/2003, Scott Miller wrote:
>That's $25 saved, times three units... and a 7806 regulator is about 60
>cents. And I LIKE tearing things apart and making them do things they
>weren't intended to do. =]
Okay, but then you mentioned tearing apart the unit even further to remote
mount the antenna. Again, aren't there GPS engines (OEM & Not) available
designed to take external antennas? Many available for about the cost of a
discount Digitraveler...
Furthermore, you mention FLYING. I personally would not like some home
kludged 60 cent power converter catching fire while I was in any type of
aircraft/glider/parawing. Yeah I saved $75, but that hospital/funeral bill
set me back a little bit more...
Ask Bob Bruninga about 12 volts and vehicles and fires... :)
Also I question the safety of attaching anything to a CRASH helmet, not
approved of by the manufacturer. I know that the BELL and Giro helmets I
own have owner's manuals that specifically warn against such a practice.
73,
Mark
KC7BXS
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Subject: Re: Digitraveler power
From: "Gregg G. Wonderly" <gregg@skymaster.cytetech.com>
Date: Wed, 30 Jul 2003 22:24:36 -0500
X-Message-Number: 15
>Speaking of power, I've got pretty much everything converted to the
>connectors-which-must-not-be-named. For running multiple devices from a
>single source, I'd like to stack a few together vertically and jumper them
>together. Mechanically it seems to work great. Is such a distribution
>block common practice? Any reason I shouldn't do it?
I have a block of 4 pairs stacked together on my bench...
-----
gregg@cytetech.com (Cyte Technologies Inc)
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