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If I remember right they were HopeRF RFM23BPWs:
<a class="moz-txt-link-freetext" href="https://www.hoperf.com/modules/enhanced_power/RFM23BP.html">https://www.hoperf.com/modules/enhanced_power/RFM23BP.html</a><br>
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Scott<br>
N1VG<br>
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<div class="moz-cite-prefix">On 2/16/2022 2:23 PM, DANA MYERS wrote:<br>
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<div> On 02/16/2022 2:13 PM Scott Miller
<a class="moz-txt-link-rfc2396E" href="mailto:scott@opentrac.org"><scott@opentrac.org></a> wrote: </div>
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If you were going to build a whole new system from scratch and
set some minimum requirements, 9600 baud would be a good idea. <br>
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Several years ago I built a batch of magnetic mount trackers for
ambulances and support vehicles at Burning Man. We had two dozen
9600 baud trackers on a single channel with a network cycle time
of 6 seconds, and each tracker transmitted every position packet
twice for a total of 8 packets per second. They were all
received by a single TM-D710. The transmitters were half-watt
modules on the 70cm band and I think they were maybe $20 each.
They worked well and we could track ambulances until they
disappeared into the hills about 15 miles away on their way to
Reno. <br>
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Higher power radios tend to not have such a fast TXD though. </blockquote>
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<div style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);" class="default-style"> Were
these modules crystal-controlled? The fastest TxD radios (20mS
and less) </div>
<div style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);" class="default-style"> I've
had are all crystal-controlled, with the lone exception of an
MCX-100 with </div>
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sans-serif; color: rgb(51, 51, 51);" class="default-style">
Fast-Lok synthesizer option, that was as fast as
crystal-controlled. </div>
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<div style="font-size: 12pt; font-family: helvetica, arial,
sans-serif; color: rgb(51, 51, 51);" class="default-style"> 73,
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Dana K6JQ </div>
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