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[aprssig] GPS interference?

Earl Needham earl.kd5xb at gmail.com
Thu Nov 24 03:48:08 UTC 2011


Just had another incident of the same, about 8 miles south of Melrose, New
Mexico.  Since there isn't much there, on a hunch I decided to turn off the
GPS-V.  IMMEDIATELY the truck computer found the sats again, so --

My GPS-V has an external amplified antenna on it.  It's about 7 or 8 years
old, and has been through a lot of rain & snow.  Is itpossible the antenna
has some corrosion somewhere, such that it might oscillate and cause
interference in the GPS band?

Vy 7 3
Earl
KD5XB


On Wed, Nov 23, 2011 at 6:10 PM, Earl Needham <earl.kd5xb at gmail.com> wrote:

> **
> I can be fairly specific about where I had the problem in Denver -- I was
> on I-225, headed north, about a mile south of I-70. I guess I'll have to
> check a map to locate Federal Heights.
>
> Earl
>
> KD5XB -- Earl Needham http://groups.yahoo.com/group/cw_bugs Quoting from
> the Coast Guard: ZUT Posted via Blackberry
> ------------------------------
> *From: * david vanhorn <kc6ete at gmail.com>
> *Date: *Wed, 23 Nov 2011 17:48:49 -0700
> *To: *<earl.kd5xb at gmail.com>; TAPR APRS Mailing List<aprssig at tapr.org>
> *Subject: *Re: [aprssig] GPS interference?
>
> I have a suspiciously low number of reports in the federal heights area,
> but other than that it looks ok.
> This is an old Trimble yellow thing, not Earthmate, but similar.  Needed a
> mod to run from 12V and has to hear "ASTRAL" before it will work.
>
>
> On Wed, Nov 23, 2011 at 5:39 PM, david vanhorn <kc6ete at gmail.com> wrote:
>
>> Interesting..  I can check my tracks.  I get thru Denver pretty often.
>> You know it's all our fault for using their spectrum for all these years,
>> right? (wink wink wink)
>>
>> BTW: I'd like to meet you in person one of these days..  :)
>>
>>
>> On Wed, Nov 23, 2011 at 1:19 PM, Earl Needham <earl.kd5xb at gmail.com>wrote:
>>
>>> Anybody know if Lightsquared is testing in Colorado?
>>>
>>> Last night, while driving the 18-wheeler up I25, my old Garmin GPS-V
>>> (for APRS) lost the sats 6 or 8 times -- in Trinidad, Pueblo, and Denver.
>>>  I first thought my GPS-V was dieing of old age -- but then I noticed the
>>> truck computer was losing the GPS signal at the same time. My Dezl 560LMT
>>> didn't seem to be affected.
>>>
>>> I called my company this morning and they told me that some of our
>>> drivers had reported similar problems in the Southeast.
>>>
>>> Anybody know what's going on?
>>>
>>> Thanks,
>>> Earl
>>>
>>>
>>> KD5XB -- Earl Needham http://groups.yahoo.com/group/cw_bugs Quoting
>>> from the Coast Guard: ZUT Posted via Blackberry
>>>
>>> _______________________________________________
>>> aprssig mailing list
>>> aprssig at tapr.org
>>> https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig
>>>
>>
>>
>
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