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[aprssig] D700A TNC Problems????

William N. Powell billpwl1 at verizon.net
Sat Sep 15 03:04:25 UTC 2007


Ken, A few questions about the setup on your bike.

What type of Antenna and where is it mounted on the bike?

Poor grounding of the antenna or the small size of the ground plane of 
the bike could be causing odd radiation patterns that prevent the close 
in digi's from hearing you.

How high is W4IAX-7?

Does the same thing happen on the return trip?

Try the same radio in a different vehicle.

73   Bill  N3PZB




Ken H> wrote:
> Hello all. I'm riding from Fairhope, AL over to work each day and have
> not been getting into the digipeaters that well. The KI4ELU-7 I get to
> nicely when in range, but as I cross I-10 to the north, I do not get
> digi'd very good. When on I-10 I am VERY close to W4IAX-7 digi. See
> below for my raw packets showing KI4ELU-7 as the first digi that picks
> me up. Note that N4ESS-2 in the next batch of raw packets is picked up
> by W4IAX-7 digi even though he's futher away than I am. Can anyone
> give me any ideas as to "why" W4IAX-7 digi does not pick me up? I'm
> using a D700A radio mounted on a motorcycle.
> 
> 2007-09-13 11:34:15 GMT: 
> K9FV-1>SP4P2W,KI4ELU-7,W4NN-1*,WIDE2-1,qAo,WD4HDT:`tZl"|*</]"3c}Test new 
> APRS de K9FV
> 2007-09-13 11:45:42 GMT: 
> K9FV-1>SP3S1V,KI4ELU-7,WF4X-7,W4AP-3*,qAO,KE4LTT:`t_Fm!k</]"3[}Test new 
> APRS de K9FV
> 2007-09-13 11:46:34 GMT: 
> K9FV-1>SP3R7T,KI4ELU-7,W5PFC*,WIDE2-1,qAo,AA5ED-10:`t_Fo5k</]"3\}Test 
> new APRS de K9FV
> 2007-09-13 11:47:08 GMT: 
> K9FV-1>SP3R7T,KI4ELU-7,WF4X-7*,WIDE2-1,qAo,WD4ROJ-1:`t_Fo5k</]"3\}Test 
> new APRS de K9FV
> 2007-09-13 11:51:35 GMT: 
> K9FV-1>SP3P9T,KI4ELU-7,W5PFC*,WIDE2-1,qAo,AA5ED-10:`t`7l e</]"3c}Test 
> new APRS de K9FV
> 2007-09-13 11:52:52 GMT: 
> K9FV-1>SP3P9T,KI4ELU-7,WF4X-7*,WIDE2-1,qAo,WD4ROJ-1:`t`7l e</]"3c}Test 
> new APRS de K9FV
> 
> HEre is W5WHT-7's raw packets showing W4IAX-7 as his first digipeater
> most of the time with KI4ELU-7 only twice.
>  
> 2007-09-13 22:04:43 EDT: *W5WHT-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W5WHT-7>*>S0TQ5Q, W4IAX-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W4IAX-7>,WIDE1,W4NN-1 
> <http://aprs.he.fi/?c=raw&limit=&call=W4NN-1>,WIDE2,WF4X-7* 
> <http://aprs.he.fi/?c=raw&limit=&call=WF4X-7>,WIDE2-1,qAo, WD4ROJ-1 
> <http://aprs.he.fi/?c=raw&limit=&call=WD4ROJ-1>:`tYR ?
k/]"4(}
>  2007-09-13 22:08:03 EDT: *W5WHT-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W5WHT-7>*>S0SY9Y, W4IAX-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W4IAX-7>,WIDE1,W4NN-1 
> <http://aprs.he.fi/?c=raw&limit=&call=W4NN-1>,WIDE2*,WIDE2-2,qAo,WD4HDT 
> <http://aprs.he.fi/?c=raw&limit=&call=WD4HDT>:`sV$ ]-k/]"3u}
>   2007-09-13 22:10:05 EDT: *W5WHT-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W5WHT-7>*>S0SY5S,W4IAX-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W4IAX-7>,WIDE1*,WIDE2,WIDE2-2,qAO, 
> KB5VE-1 <http://aprs.he.fi/?c=raw&limit=&call=KB5VE-1>:`sTH I!k/]"3q}
>  2007-09-13 22:10:37 EDT: *W5WHT-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W5WHT-7>*>S0SY5S, KI4ELU-7 
> <http://aprs.he.fi/?c=raw&limit=&call=KI4ELU-7>,W4NN-1 
> <http://aprs.he.fi/?c=raw&limit=&call=W4NN-1>,WIDE2,WF4X-7 
> <http://aprs.he.fi/?c=raw&limit=&call=WF4X-7>,WIDE2*,qAO, KD4MOJ-9 
> <http://aprs.he.fi/?c=raw&limit=&call=KD4MOJ-9>:`sTH I!k/]"3q}
>  2007-09-13 22:12:05 EDT: *W5WHT-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W5WHT-7>*>S0SY3S, KI4ELU-7 
> <http://aprs.he.fi/?c=raw&limit=&call=KI4ELU-7>,W4JBB-7* 
> <http://aprs.he.fi/?c=raw&limit=&call=W4JBB-7>,WIDE2-2,qAO,KF4YPK-2 
> <http://aprs.he.fi/?c=raw&limit=&call=KF4YPK-2>:`sRd lk/]"3x}
>   2007-09-13 22:14:09 EDT: *W5WHT-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W5WHT-7>*>S0SY3Q,W4IAX-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W4IAX-7>,WIDE1*,WIDE2,WIDE2-2,qAO, 
> KB5VE-1 <http://aprs.he.fi/?c=raw&limit=&call=KB5VE-1>:`sQK Rvk/]"4#}
>  2007-09-13 22:18:14 EDT: *W5WHT-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W5WHT-7>*>S0SX3Q, W4IAX-7 
> <http://aprs.he.fi/?c=raw&limit=&call=W4IAX-7>,WIDE1,W4NN-1 
> <http://aprs.he.fi/?c=raw&limit=&call=W4NN-1>,WIDE2*,WIDE2-2,qAo,WD4HDT 
> <http://aprs.he.fi/?c=raw&limit=&call=WD4HDT>:`sP2n6<k/]"4E}
> My concern is the TNC in my D700A isn't working correctly - I've read a 
> couple of posts about the TNC not transmitting correctly - perhaps with 
> packets digi'd for a couple of days, then not working correctlly.  Since 
> this radio is only a month old, I'd like to determine this early on if 
> possible.
>  
> Also, there are several times when I get digi'd by the KI4ELU-7 digi, 
> but it never makes it to an Igate.  Perhaps the TNC is sending packets 
> that are almost out of spec and only KI4ELU can pass them reliably?
>  
> Is there any way I can *test* this radio to check?
>  
> Thanks to all for any help,
>  
> Ken H> K9FV-1
> 
>  
> 
> 
> 
>  
> 
> 
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