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The Radiometrix HX1 has been in use in trackers for at least a
decade, I think - if I recall correctly it's what the original
MicroTrak from Byonics used, isn't it?<br>
<br>
Scott<br>
N1VG<br>
<br>
<div class="moz-cite-prefix">On 6/1/2018 11:04 AM, Greg Clark wrote:<br>
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<blockquote type="cite"
cite="mid:CAODNmyF44z65VDeCWejp7STUHDdF+1=mJPYTivsNsvr03GSL5w@mail.gmail.com">
<div dir="ltr">$50, wow!</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Jun 1, 2018 at 10:44 AM, david
vanhorn <span dir="ltr"><<a href="mailto:kc6ete@gmail.com"
target="_blank" moz-do-not-send="true">kc6ete@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
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<div dir="ltr">
<div><a href="https://www.sparkfun.com/products/14740"
target="_blank" moz-do-not-send="true">https://www.sparkfun.com/<wbr>products/14740</a></div>
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<div>Sparkfun now has a dedicated APRS transmitter!</div>
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<div>"
<div class="m_-5336817283264486926gmail-tab-pane
m_-5336817283264486926gmail-active"
id="m_-5336817283264486926gmail-description-tab">
<div class="m_-5336817283264486926gmail-col-sm-12">
<p>The HX1 is a low-power amateur radio transmitter
set to a fixed frequency of 144.390 MHz. In North
America, this frequency is used for the Automatic
Packet Reporting System, or <a
href="http://www.aprs.org" target="_blank"
moz-do-not-send="true">APRS</a>.</p>
<p>APRS is a standard used by amateur-radio
operators to broadcast live sensor data on a
shared frequency. This data can be received by
anyone with the proper equipment, and is
aggregated on the internet through gateways run by
members of the APRS community. APRS is commonly
used to share real-time data including vehicle
location (GPS), weather stations, high-altitude
balloon tracking, remote sensor platforms,
disaster relief coordination, and more. It’s
effectively an open-source, open-data,
community-run, free to use, IoT system with
potentially worldwide coverage.</p>
<p>The HX1 is a 5V, low-power (300mW), narrowband
(3kHz) VHF FM transmitter module. With a simple
antenna, the range will be around 6 miles. Since
this is a “bare” transmitter, the data input must
be properly modulated and formatted. There are
several Arduino software packages that can do
this, see the hookup guide for information.</p>
<p><strong>Note:</strong> Because it uses amateur
radio frequencies, you will need an amateur radio
license to use the HX1. It’s easy (and fun!) to
get one.</p>
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"<span class="HOEnZb"><font color="#888888"><br>
</font></span></div>
<span class="HOEnZb"><font color="#888888">
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-- <br>
<div class="m_-5336817283264486926gmail_signature">
<div dir="ltr">K1FZY (WA4TPW) SK 9/29/37-4/13/15<br>
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</font></span></div>
<br>
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