<div dir="ltr">Here, my (really old) Tom Tom still kinda works but takes an eternity to get a lock, and has a lot of slop now it's location, in that it appears that I'm wondering all over even while sitting still, and it won't keep time, I've had to correct the time on it now the last couple times I've used it. <br><br>My Byonics GPS2 puck that came with my TinyTrak 4 appears to be working, in that the TT4 is showing good GPS and it's beaconing, but due to lack of coverage, I have yet to get digipeated and relayed into APRS-IS so I can see what it's actually doing. <div><br></div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div align="left"><div align="left"><div align="left" style="font-size:small"><span style="font-size:12.8px">Matthew A. Chambers, NR0Q</span><br></div><div align="left" style="font-size:small"><span style="font-size:12.8px"><br></span></div><div align="left"><br></div></div></div></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 24, 2019 at 11:52 AM Stephen H. Smith via aprssig <<a href="mailto:aprssig@lists.tapr.org">aprssig@lists.tapr.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p><font face="Arial"><font face="Arial">GPS expresses the current
time and date with a?? series of binary counters.?? This
included a 10-bit binary counter for the current week, meaning
that it could only count 1024 (decimal) weeks (just under 20
years) before rolling over from 1111111111 to 0000000000, and
starting over.?? This 1024-week cycle is known as an "epoch".??
The previous epoch ended on April 6th of this year.?? As of
April 6th, a 16-bit counter for weeks replaced the 10-bit
one.?? This change will put off the NEXT epoch rollover for
65,535 weeks - about 1200 years. </font><br>
</font></p>
<p><font face="Arial">Some older GPS hardware (actually firmware)
couldn't handle either the rollover from 1023 back to 0000, or
couldn't handle the new longer 16-bit counter format.?? Such
devices quit working on April 6th of this year.?? <br>
</font></p>
<p><font face="Arial"><br>
</font></p>
<p><font face="Arial">Now that the GPS equivalent of "Y2K" (April
6th) has come and gone, here are my findings testing a bunch of
older GPS hardware.</font></p>
<p><font face="Arial"><br>
</font></p>
<p><font face="Arial">-???? Radio Shack "DigiTraveller" (a faceless
serial puck-type device that looked like a flying saucer) -??
DIED</font></p>
<p><font face="Arial">-???? Holux GM-200?? USB-connected faceless
mouse-type device - DIED</font></p>
<p><font face="Arial">-???? Rand McNally serial mouse-type device -
DIED</font></p>
<p><font face="Arial">-???? 2nd-gen Delorme Earthmate small yellow
unit with interchangeable serial and USB cables (not the
original large Earthmate) - DIED<br>
</font></p>
<p><font face="Arial">The Holux and Rand-McNally are visible in this
pic on my website:<br>
???????? <a class="gmail-m_-2923466086708995160moz-txt-link-rfc2396E" href="http://WA8LMF.net/aprs/GPS-Antenna-Farm.htm" target="_blank"><http://WA8LMF.net/aprs/GPS-Antenna-Farm.htm></a></font></p>
<p><font face="Arial">-???? Tri-M "Super Skymaster"?? white hard-mount
combo antenna/receiver (shown in the inset photo of the above
pic) survived and WORKS.?? This is especially amazing, given that
it was the oldest of all these units.</font></p>
<p><font face="Arial">- ?? Globalsat BC-337 compact flash/PCMCIA unit
- DIED?? <br>
</font></p>
<p><font face="Arial">-???? Garmin Foretrex 201 wrist-wearable that is
actually a repackaged version of the classic yellow Etrex -
WORKS</font></p>
<p><font face="Arial">-???? Globalsat BU-353 (USB) and BU-355 (serial)
mini-pucks available for USD $30 on Amazon - WORK</font></p>
<p><font face="Arial">-???? Various unbranded generic units based on
uBLox G7 chipset - WORK <br>
</font></p>
<p><font face="Arial">-???? Internal GPS of Kenwood TH-D72 APRS
handheld - WORKS</font></p>
<p><font face="Arial">__________________________________________________________________________________</font><font face="Arial"><br>
</font></p>
<p><font face="Arial">\Stephen H. Smith?????? wa8lmf (at) <a href="http://aol.com" target="_blank">aol.com</a> </font><br>
</p>
<font face="Arial">Skype:?????????????? WA8LMF<br>
EchoLink: ?? Node #?? 14400?? [Think bottom of the 2-meter band]<br>
Home Page:?????????????????? <a class="gmail-m_-2923466086708995160moz-txt-link-freetext" href="http://wa8lmf.net" target="_blank">http://wa8lmf.net</a><br>
<br>
Live Off-The-Air APRS Activity Maps<br>
???? <a class="gmail-m_-2923466086708995160moz-txt-link-rfc2396E" href="http://wa8lmf.net/map" target="_blank"><http://wa8lmf.net/map></a><br>
<br>
Long-Range APRS on 30 Meters HF <br>
???? <a class="gmail-m_-2923466086708995160moz-txt-link-rfc2396E" href="http://wa8lmf.net/aprs/HF_APRS_Notes.htm" target="_blank"><http://wa8lmf.net/aprs/HF_APRS_Notes.htm></a><br>
<br>
</font>
<p><font face="Arial"><br>
</font></p>
<p><font face="Arial"><br>
</font></p>
<p><font face="Arial"><br>
</font></p>
<p><font face="Arial"></font> <br>
</p>
</div>
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</blockquote></div>