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On 5/11/2011 10:32 AM, r gilson wrote:
<blockquote cite="mid:41985.88841.qm@web110203.mail.gq1.yahoo.com"
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<td style="font: inherit;" valign="top">Interesting 433 for
garage door openers and APRS for commercial stuff? This
area has repeater links and other stuff in this area?<br>
<br>
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<br>
<a class="moz-txt-link-freetext" href="http://www.arrl.org/band-plan-1">http://www.arrl.org/band-plan-1</a><br>
<br>
Per that (and I understand different regions may not adhere 100% to
this)<br>
<br>
433.00-435.00 Aux/Repeater links<br>
<br>
My own repeater has a duplex link in this area.<br>
<br>
Remember, though, Amateur use is secondary from 420-449.99 in the
US; and there are "Line A" and "Line B" geographic restrictions on
use of parts of the band. <br>
<br>
<br>
<blockquote cite="mid:41985.88841.qm@web110203.mail.gq1.yahoo.com"
type="cite">
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<td style="font: inherit;" valign="top">--- On <b>Wed,
5/11/11, Wes Johnston, AI4PX <i><a class="moz-txt-link-rfc2396E" href="mailto:wes@ai4px.com"><wes@ai4px.com></a></i></b>
wrote:<br>
<blockquote style="border-left: 2px solid rgb(16, 16,
255); margin-left: 5px; padding-left: 5px;"><br>
From: Wes Johnston, AI4PX <a class="moz-txt-link-rfc2396E" href="mailto:wes@ai4px.com"><wes@ai4px.com></a><br>
Subject: Re: [aprssig] FBI Equivalent Of An APRS Tracker<br>
To: "TAPR APRS Mailing List" <a class="moz-txt-link-rfc2396E" href="mailto:aprssig@tapr.org"><aprssig@tapr.org></a><br>
Date: Wednesday, May 11, 2011, 10:19 AM<br>
<br>
<div id="yiv677149423">
<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="yiv677149423gmail_quote">On Wed, May 11,
2011 at 04:36, Jon K Hellan <span dir="ltr"><<a
moz-do-not-send="true" rel="nofollow"
ymailto="mailto:hellan@acm.org" target="_blank"
href="/mc/compose?to=hellan@acm.org">hellan@acm.org</a>></span>
wrote:<br>
<blockquote style="border-left: 1px solid rgb(204,
204, 204); margin: 0px 0px 0px 0.8ex;
padding-left: 1ex;"
class="yiv677149423gmail_quote">
<div class="yiv677149423im">On 05/10/2011 05:23
PM, Peter Baumgartner wrote:<br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex;
padding-left: 1ex;"
class="yiv677149423gmail_quote"><br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_quote">So many
adjustments! UHF "APRS"...<br>
</blockquote>
<br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_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 class="yiv677149423h5"><br>
<br>
Looks like a SAW resonator on the board (RFM<br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_quote">
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_quote">RFI172)
It didn't search on the RFM site:<br>
<a moz-do-not-send="true" rel="nofollow"
target="_blank"
href="http://www.rfm.com/products/sawresonators.php">http://www.rfm.com/products/sawresonators.php</a><br>
</blockquote>
<br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_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: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_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: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_quote">If you
want ZEMICS App note(s) and data sheet(s).
There's several:<br>
<a moz-do-not-send="true" rel="nofollow"
target="_blank"
href="http://www.datasheetarchive.com/XE1201-datasheet.html">http://www.datasheetarchive.com/XE1201-datasheet.html</a><br>
</blockquote>
<br>
<br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_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: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_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: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_quote">---
Stephen H. Smith wrote:<br>
</blockquote>
<br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_quote">
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_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 moz-do-not-send="true"
rel="nofollow" target="_blank"
href="http://www.wired.com/threatlevel/2011/05/gps-gallery">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 moz-do-not-send="true"
rel="nofollow" target="_blank"
href="http://www.wired.com/threatlevel/2011/05/gps">http://www.wired.com/threatlevel/2011/05/gps</a>><br>
<br>
<br>
--<br>
<br>
Stephen H. Smith wa8lmf (at) <a
moz-do-not-send="true" rel="nofollow"
target="_blank" href="http://aol.com/">aol.com</a><br>
</blockquote>
</blockquote>
<br>
<br>
<blockquote style="border-left: 1px solid
rgb(204, 204, 204); margin: 0px 0px 0px
0.8ex; padding-left: 1ex;"
class="yiv677149423gmail_quote">_______________________________________________<br>
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</blockquote>
<br>
<br>
Peter Baumgartner<br>
WWW: <a moz-do-not-send="true"
rel="nofollow" target="_blank"
href="http://www.timetronic.it/">www.timetronic.it</a><br>
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