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ZL3AI > APRDIG 04.08.06 09:16l 296 Lines 11010 Bytes #999 (0) @ WW
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Subj: [APRSSIG] Vol 25 #27, 1/2
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To : APRDIG@WW
Today's Topics:
1. Re: Mounting 2M Xcvr in '05 Toyota Camry (Steve Noskowicz)
2. Finding HF GATEs (Ben Jackson)
3. Re: Finding HF GATEs (Steve Dimse)
4. Re: Finding HF GATEs (Steve Dimse)
5. Re: Finding HF GATEs on FINDU (Robert Bruninga)
6. Re: Finding HF GATEs on FINDU (Steve Dimse)
7. Re: Finding HF GATEs on FINDU (Ben Jackson)
8. RE: Mounting 2M Xcvr in '05 Toyota Camry (J. Gary Bender, WS5N)
9. RE: Mounting 2M Xcvr in '05 Toyota Camry (Bob Burns K4RXR)
10. Re: Mounting 2M Xcvr in '05 Toyota Camry (Stephen H. Smith)
11. GPS18 USB & NMEA (Andy AB9FX)
12. Re: GPS18 USB & NMEA (John Habbinga)
13. Re: OpenTracker !DAO! support and enhanced resolution (Ian ZL1VFO)
14. Re: GPS18 USB & NMEA (VE7GDH)
15. Re: Finding HF GATEs on FINDU (Robert Bruninga)
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Message: 1
Date: Wed, 26 Jul 2006 13:48:59 -0700 (PDT)
From: Steve Noskowicz <noskosteve_at_yahoo.com>
Subject: Re: [aprssig] Mounting 2M Xcvr in '05 Toyota Camry
If it sounded like I was promoting mag mounts, I wasn't. I do use them for
2 & 440 only 'cuz I havn't had the time to do the install (family business
and now a retirement offer I can't refuse has stolen much of my free time).
They have their place and aren't all bad, but can cause problems. I also
recommend doing a real install. The holes do not adversely change the
value. My last car, a 92, had 248,000+ miles so I don't care anyway.
You can use mag mounts and have no problems or you can. You may or may not
be able to solve them almost all can be solved. There are al of of tricks
I know from my early installation days and if you don't know them, it can
seem impossible sometimes. All the way from dash clock spew to
trunk-closing motor lines and bumper mounts and motorcycle seat springs.
Right now if I run the full 50 W on 2, my Garmin V starts its shut down
sequence, thinking it lost external power. I haven't worked on fixing it
yet and live with it. I don't know if there any good books on mobile.
There used to be one some time ago that many praised, but I don't know if
it is still available from ARRL.
Good luck. &
73, Steve, K9DCI
------------------------------
Message: 2
Date: Wed, 26 Jul 2006 14:20:12 -0700
From: Ben Jackson <ben_at_ben.com>
Subject: [aprssig] Finding HF GATEs
Is there an easy way to identify all the HF GATEs? I'm watching an
APRS-IS feed filtered for /& (described as "HF GATE") and \- ("HF home")
only a fraction seem to be on HF. Lots of the /& appear to be
IGates and a lot of the homes have paths making them look like they're
on 2m. I'm guessing that many people pick symbols based on the pictures
rather than the descriptions.
--
Ben Jackson AD7GD
http://www.ben.com/
------------------------------
Message: 3
Date: Wed, 26 Jul 2006 17:43:51 -0400
From: Steve Dimse <steve_at_dimse.com>
Subject: Re: [aprssig] Finding HF GATEs
By definition, an IGate is on both HF and 2 meters. If a station
simultaneously transmits a beacon on both HF and VHF, the VHF beacon will
get sent in a quarter of the time, and therefore is much more likely to
reach the APRS Internet System first. The second to reach the APRS IS is
filtered. As is true with any propagation related question, the APRS IS is
not an appropriate tool to answer the question.
Steve K4HG
------------------------------
Message: 4
Date: Wed, 26 Jul 2006 17:51:47 -0400
From: Steve Dimse <steve_at_dimse.com>
Subject: Re: [aprssig] Finding HF GATEs
On Jul 26, 2006, at 5:43 PM, Steve Dimse wrote:
>By definition, an IGate is on both HF and 2 meters.
Obviously, I meant an HF Gate!
Steve K4HG
------------------------------
Message: 5
Date: Wed, 26 Jul 2006 18:04:18 -0400
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: Re: [aprssig] Finding HF GATEs on FINDU
"<Steve Dimse" <k4hg_at_tapr.org>
>>>ben_at_ben.com 07/26/06 5:20 PM >>>
>Is there an easy way to identify all the HF GATEs?
>I'm watching an APRS-IS feed filtered for /&
>(described as "HF GATE") and \- ("HF home")
>only a fraction seem to be on HF.
Those descriptions derived back from 1993 before we had Igates. When IGates
came out, we receommended that HF gates use an "H" overlay (H&) and Igates
use an "I" overlay (I&).
Doing a FINDU search by symbol won't work because when you put "&" into the
CGI, it chokes. Maybe steve can include "ampersand" as a string to replace
"&" when seraching for GATES. Then the URL would be:
http://www.findu.com/cgi-bin/symbol.cgi?icon=/ampersand&limit 0
http://www.findu.com/cgi-bin/symbol.cgi?icon=Hampersand&limit 0
http://www.findu.com/cgi-bin/symbol.cgi?icon=Iampersand&limit 0
and the second one would show you all "H" gates and the third one all "I"
gates.
de Wb4APR, Bob
------------------------------
Message: 6
Date: Wed, 26 Jul 2006 18:17:21 -0400
From: Steve Dimse <steve_at_dimse.com>
Subject: Re: [aprssig] Finding HF GATEs on FINDU
Bob, I love you most of all because you even LOOK like the absent minded
professor you ARE...
From Christmas Eve, 2004 (I was laid up in bed with a shattered ankle, why
were you emailing on Xmas eve????), when I fixed this at your urging:
Begin forwarded message:
>On 12/24/04 at 6:05 PM Robert Bruninga <bruninga_at_usna.edu> sent:
>
>>I suspect the # digi character is throwing your CGI parser
>>for a loop? Im trying to work on the overall North
>>Americal Strategy for digis and need to konw where
>>all the T digis are...
>>
>I spent a little time trying to find a general solution and
>couldn't, so here's
>a quick and dirty solution, the text pound gets replaced with # and
>amp replaced
>with &. There are probably other problems, if you need any I'll fix
>them, but
>this isn't a popular cgi, only 323 hits this month, and that
>includes the
>release mention on aprssig...
>
>http://www.findu.com/cgi-bin/symbol.cgi?icon=Tpound
>http://www.findu.com/cgi-bin/symbol.cgi?icon=/amp
Maybe if I started billing you for each time you do this....
Steve K4HG
On Jul 26, 2006, at 6:04 PM, Robert Bruninga wrote:
>>>>ben_at_ben.com 07/26/06 5:20 PM >>>
>>Is there an easy way to identify all the HF GATEs?
>>I'm watching an APRS-IS feed filtered for /&
>>(described as "HF GATE") and \- ("HF home")
>>only a fraction seem to be on HF.
>
>Those descriptions derived back from 1993 before we had Igates.
>When IGates came out, we receommended that HF gates use an
>"H" overlay (H&) and Igates use an "I" overlay (I&).
>
>Doing a FINDU search by symbol won't work because when you
>put "&" into the CGI, it chokes. Maybe steve can include
>"ampersand" as a string to replace "&" when seraching
>for GATES. Then the URL would be:
>
>http://www.findu.com/cgi-bin/symbol.cgi?icon=/ampersand&limit 0
>http://www.findu.com/cgi-bin/symbol.cgi?icon=Hampersand&limit 0
>http://www.findu.com/cgi-bin/symbol.cgi?icon=Iampersand&limit 0
>
>and the second one would show you all "H" gates and the third one
>all "I" gates.
>
>de Wb4APR, Bob
------------------------------
Message: 7
Date: Wed, 26 Jul 2006 16:23:09 -0700
From: Ben Jackson <ben_at_ben.com>
Subject: Re: [aprssig] Finding HF GATEs on FINDU
On Wed, Jul 26, 2006 at 06:04:18PM -0400, Robert Bruninga wrote:
>Doing a FINDU search by symbol won't work because when you
>put "&" into the CGI, it chokes. Maybe steve can include
>"ampersand" as a string to replace "&" when seraching
>for GATES. Then the URL would be:
You can escape those like this:
http://www.findu.com/cgi-bin/symbol.cgi?icon=/%26&limit 0
http://www.findu.com/cgi-bin/symbol.cgi?icon=I%26&limit 0
http://www.findu.com/cgi-bin/symbol.cgi?icon=H%26&limit 0
The last one (HF GATE) returns no answers. The other two return many.
--
Ben Jackson AD7GD
http://www.ben.com/
------------------------------
Message: 8
Date: Wed, 26 Jul 2006 17:30:44 -0600
From: "J. Gary Bender, WS5N" <WS5N_at_mindspring.com>
Subject: RE: [aprssig] Mounting 2M Xcvr in '05 Toyota Camry
I have wondered if the placement of the car's broadcast antenna is any
indication of possible problems. I noticed that all Honda and Toyota
hybrids have external antennas mounted away from the engine. In the case
of the Honda, at least, that is how the salesman spotted hybrids to show
me. My VW diesel has the antenna at the back of the roof, too. I have not
noticed if that is only on diesels, however.
No problems with 50 watts on 2 meters with the VW TDI. Have not tried the
HF mobile yet.
--
J. Gary Bender, WS5N
DM54rp
Fence Lake, New Mexico USA
On Wed, 26 Jul 2006 15:56:01 +0100, Dave Baxter wrote:
>Hi...
>
>As an EMC type, and a QRO RF technician, plus knowing more about
>some vehicle electrics than I care to admit, I say this...
>
>If you get *Any* "odd" behaviour of the car when transmitting,
>either stop transmitting or reduce power levels till the "Odd"
>behaviour goes away. Then, at the earliest possibility, review the
>radio installation to keep RF away from whatever vehicle system was
>affected. Until such time, do not use the radio at those power
>levels, or at all, if the problem is really bad.
>
>You are unlikely to "Fry" a car's electrics, or (any of the many)
>computers, but you could in extreme cases cause the engine
>management to go funny, or cut the motor if it gets really upset.
>The worst could be that you are left stranded with a fault light
>on, and being unable to restart the engine until a dealer or other
>techie type resets the management fault log.
>
>That is for any vehicle, petrol(gas) or diesel with a fly-by-wire
>engine, as most are built nowadays. Such problems as your dealer
>says, if attributed to your after marked radio installation are
>unlikely to be covered by the makers (dealers, or third party)
>warranty scheme.
>
>The usual things that can happen, are indicators flashing too fast,
>or not at all in the presence of high levels of RF, false
>indications of engine revs or other information, and things like
>wipers, window or seat controls not working as intended. Not
>usually a safety critical problem, but the distraction it can cause
>can be a safety issue.
>
>You are more likely to suffer higher than expected levels of QRM
>from the car, to the radio on RX, than cause the car problems.
>Particularly bad, are some common rail diesel engines, as the
>injectors use a high voltage to operate, and the SMPS in the
>management box, can radiate somewhat on HF. In EMC terms, things
>don't radiate much (if at all) below 30MHz, but there again, those
>test limits are set to protect broadcast signals, not the low level
>comms stuff we are interested in.
>
>As has all been discussed at length here and on other lists, take
>great care with the DC power feed, and RF grounding. In
>particular, if you run the -ve lead for the radio direct from the
>battery, fuse it! You wouldn't be the first to melt a radio or
>accessories when starting the engine if the normal battery ground
>strap is anything less than perfect...
>
>Take care..
>
>Dave G0WBX.
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