<div>That would be a short range link... so I guess they do a "drive by" and download the data from curbside as opposed to live tracking. Of course it would be easy (and smart) to make it beacon while moving too.</div>
<div><br clear="all">Wes </div>
<div>---<br>The world needs more geniuses with humility because there are so few of us left.<br></div><br><br><br>
<div class="gmail_quote">On Wed, May 11, 2011 at 04:36, Jon K Hellan <span dir="ltr"><<a href="mailto:hellan@acm.org">hellan@acm.org</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div class="im">On 05/10/2011 05:23 PM, Peter Baumgartner wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote"><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">So many adjustments! UHF "APRS"...<br></blockquote><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">The transceiver chip looks pretty interesting. Too bad they didn't figure<br>out what the frequency was.<br>
</blockquote></blockquote><br></div>Just google the datasheet. It's an ISM 433 MHz chip.<br><br>Jon LA4RT
<div>
<div></div>
<div class="h5"><br><br> Looks like a SAW resonator on the board (RFM<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">RFI172) It didn't search on the RFM site:<br><a href="http://www.rfm.com/products/sawresonators.php" target="_blank">http://www.rfm.com/products/sawresonators.php</a><br>
</blockquote><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Then, what's that that looks like an unencapsulated ceramic chip by the<br>MAX chip on the RF board??<br>
</blockquote><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">The chip above the ZEMICX chip a memory ???4008CAAA 8k memory ??<br>Perhaps it stores the data and regurgitates it on command.<br>
</blockquote><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">If you want ZEMICS App note(s) and data sheet(s). There's several:<br><a href="http://www.datasheetarchive.com/XE1201-datasheet.html" target="_blank">http://www.datasheetarchive.com/XE1201-datasheet.html</a><br>
</blockquote><br><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Now that I've used the X-Bee modules and have some, I'd be inclined to use<br>them...<br></blockquote>
<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">--<br> 73, Steve, K9DCI USN (Vet) MOT (Ret) Ham (Yet)<br>--<br>I served during the cold war, so you can continue to be served a cold one.<br>
</blockquote><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">--- Stephen H. Smith wrote:<br></blockquote><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">This article from the Wired.com<br>website shows the disassembly of an FBI tracking device<br>similar to an APRS tracker.<br>
<br>.<<a href="http://www.wired.com/threatlevel/2011/05/gps-gallery" target="_blank">http://www.wired.com/threatlevel/2011/05/gps-gallery</a>><br><br>And an article about a person finding one of these things<br>on their car:<br>
<br>.<<a href="http://www.wired.com/threatlevel/2011/05/gps" target="_blank">http://www.wired.com/threatlevel/2011/05/gps</a>><br><br><br>--<br><br>Stephen H. Smith wa8lmf (at) <a href="http://aol.com/" target="_blank">aol.com</a><br>
</blockquote></blockquote><br><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">_______________________________________________<br>aprssig mailing list<br><a href="mailto:aprssig@tapr.org" target="_blank">aprssig@tapr.org</a><br>
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