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<p><font face="Arial">Or if you want cheaper suggestions take a look
here ... <a class="moz-txt-link-freetext" href="http://www.febo.com/time-freq/index.html">http://www.febo.com/time-freq/index.html</a></font></p>
<p><font face="Arial">The site is owned by John Ackerman, N8UR, a
name well known to old packet radio hands.</font></p>
<p><font face="Arial"></font>Ray vk2tv<br>
</p>
<br>
<div class="moz-cite-prefix">On 19/11/17 22:51, Matthew Cook wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAE+2d_07+MLPr4E179bktBYEQQR=LNV1NXNgxA=yNV0Y9QT+NQ@mail.gmail.com">
<div dir="ltr">For when you decide to get serious about frequency
accuracy...
<div><br>
</div>
<div><a href="http://www.fei-zyfer.com/gpstarplus.htm"
moz-do-not-send="true">http://www.fei-zyfer.com/gpstarplus.htm</a><br>
</div>
<div><br>
</div>
<div>That then feeds the IRIG-A clock on the wall that I
recently acquired, fun to watch the hands go backwards a few
weeks ago.</div>
<div><br>
</div>
<div>The oscillator I've recently completed at work is one order
of magnitude better than this, I'm still two orders of
magnitude short of the team at Tid, maybe one day.</div>
<div><br>
</div>
<div>73<br>
</div>
<div><br>
</div>
<div>Matthew</div>
<div>VK5ZM</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 19 November 2017 at 15:20, <span
dir="ltr"><<a href="mailto:vk4tec@tech-software.net"
target="_blank" moz-do-not-send="true">vk4tec@tech-software.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="purple" lang="EN-AU">
<div class="m_-568346887748889906WordSection1">
<p class="MsoNormal"><span>I run an AisPy R2 here with
10 MHz locked to GPS </span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal"><span>I figure that’s as good as
its going to get</span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal"><span>Andrew </span></p>
<p class="MsoNormal"><span> </span></p>
<div>
<div style="border:none;border-top:solid #e1e1e1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
lang="EN-US"> OZAPRS [mailto:<a
href="mailto:ozaprs-bounces@aprs.net.au"
target="_blank" moz-do-not-send="true">ozaprs-bounces@aprs.<wbr>net.au</a>]
<b>On Behalf Of </b>Gavin Rogers<br>
<b>Sent:</b> Sunday, 19 November 2017 2:48 PM<span
class=""><br>
<b>To:</b> Australian APRS Users <<a
href="mailto:ozaprs@aprs.net.au"
target="_blank" moz-do-not-send="true">ozaprs@aprs.net.au</a>><br>
</span><b>Subject:</b> Re: [OZAPRS] Calibration
Signals</span></p>
</div>
</div>
<div>
<div class="h5">
<p class="MsoNormal"> </p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Yes,
but often on frequencies outside the tuning range
of a RTL SDR and the complex modulation I guess
would need specific calibration software like kal
is for GSM, and I haven't seen any.<br>
<br>
</p>
<div>
<p class="MsoNormal">On 19 November 2017 12:33:52
pm AWST, <a
href="mailto:vk4tec@tech-software.net"
target="_blank" moz-do-not-send="true">vk4tec@tech-software.net</a>
wrote:</p>
<blockquote style="border:none;border-left:solid
#cccccc 1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class="MsoNormal"><span>4G should be very
good</span></p>
<p><span> </span></p>
<p class="MsoNormal"><span>They have some of the
best frequency and time standards</span></p>
<p><span> </span></p>
<p class="MsoNormal"><span>They have to because
of the CDMA modulation</span></p>
<p><span> </span></p>
<p class="MsoNormal"><span>Andrew </span></p>
<p><span> </span></p>
<div>
<div style="border:none;border-top:solid
#e1e1e1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
lang="EN-US"> OZAPRS [<a
href="mailto:ozaprs-bounces@aprs.net.au"
target="_blank" moz-do-not-send="true">mailto:ozaprs-bounces@aprs.<wbr>net.au</a>]
<b>On Behalf Of </b>Gavin Rogers<br>
<b>Sent:</b> Sunday, 19 November 2017
2:27 PM<br>
<b>To:</b> Australian APRS Users <<a
href="mailto:ozaprs@aprs.net.au"
target="_blank" moz-do-not-send="true">ozaprs@aprs.net.au</a>><br>
<b>Subject:</b> Re: [OZAPRS] How to make
a raspberry pi satgate for the ISS</span></p>
</div>
</div>
<p> </p>
<p class="MsoNormal"
style="margin-bottom:12.0pt">Maybe different
in other states, but in Perth the only carrier
with GSM still is Vodadone, and their coverage
isn't good enough where I am to get a good
calibration.<br>
<br>
</p>
<div>
<p class="MsoNormal">On 19 November 2017
11:21:49 am AWST, Peter VK2MPJ <<a
href="mailto:vk2mpj@yahoo.com.au"
target="_blank" moz-do-not-send="true">vk2mpj@yahoo.com.au</a>>
wrote:</p>
<blockquote
style="border:none;border-left:solid #cccccc
1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<p class="MsoNormal">I’m curious why you say
that using kal and a GSM signal is not
possible anymore?</p>
<div>
<p class="MsoNormal">I did this locally
just last weekend…</p>
</div>
<div>
<p> </p>
</div>
<div>
<p class="MsoNormal">2MPJ</p>
</div>
<div>
<p> </p>
<div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"> </p>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">On 19 Nov 2017,
at 12:42 pm, Gavin Rogers <<a
href="mailto:grogers@vk6hgr.echidna.id.au"
target="_blank"
moz-do-not-send="true">grogers@vk6hgr.echidna.id.au</a>>
wrote:</p>
</div>
<p> </p>
<div>
<div>
<p class="MsoNormal"
style="background:white"><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif">On
19/11/2017 9:30 AM,<span
class="m_-568346887748889906apple-converted-space"> </span><a
href="mailto:vk4tec@tech-software.net" target="_blank"
moz-do-not-send="true"><span
style="color:purple">vk4tec@tech-software.net</span></a><span
class="m_-568346887748889906apple-converted-space"> </span>w<wbr>rote:</span></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt;font-variant-caps:normal;text-align:start;word-spacing:0px">
<p><span
style="font-family:"Helvetica",sans-serif;background:white"> </span></p>
<div>
<div>
<div>
<p class="MsoNormal"
style="background:white"><span
style="background:white">Or,
as i've mentioned
before, just link to the
existing Direwolf
SDR+APRS guide, which
covers off setting up an
igate pretty well: <a
href="https://github.com/wb2osz/direwolf/blob/master/doc/Raspberry-Pi-SDR-IGate.pdf"
target="_blank"
moz-do-not-send="true"><span
style="color:purple">https://github.com/<wbr>wb2osz/direwolf/blob/master/<wbr>doc/Raspberry-Pi-SDR-IGate.pdf</span></a></span></p>
</div>
</div>
</div>
</blockquote>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white"><br>
In this guide, there's a link to
a script that will tune to a
NOAA frequency and re-calibrate
an SDR TV stick (<span
class="m_-568346887748889906apple-converted-space"> </span></span><span
style="background:white"><a
href="https://github.com/khaytsus/direwolf-init"
target="_blank"
moz-do-not-send="true"><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:purple">https://github.com/khaytsus/<wbr>direwolf-init</span></a></span><span
class="m_-568346887748889906apple-converted-space"><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white"> </span></span><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white">)<br>
<br>
What would be a good
high-stability signal source
here in VK for the calibration?
I used to use the kal program to
calibrate against GSM
transmitters, but that's not
possible any more. I'd think the
trunking control channel for an
emergency services' channel
would be stable, strong and
always on? Or DAB+ transmitter,
or..?<br>
<br>
<br>
73<br>
Gavin.</span><span
style="background:white"></span></p>
<p><span
style="font-family:"Helvetica",sans-serif;background:white"> </span></p>
<pre style="background:white;font-variant-caps:normal;text-align:start;word-spacing:0px"><span style="font-size:9.0pt;background:white">-- </span></pre>
<p style="background:white"><span
style="font-size:9.0pt;font-family:"Courier
New";background:white"> </span></p>
<pre style="background:white"><span style="font-size:9.0pt;background:white"> Gavin Rogers | Amateur radio station VK6HGR </span></pre>
<pre style="background:white"><span style="font-size:9.0pt;background:white"> <a href="http://www.livingwaters.com/good" target="_blank" moz-do-not-send="true"><span style="color:purple">http://www.livingwaters.<wbr>com/good</span></a> | <a href="http://vk6hgr.ampr.org/" target="_blank" moz-do-not-send="true"><span style="color:purple">http://vk6hgr.ampr.org/</span></a></span></pre>
<pre style="background:white"><span style="font-size:9.0pt;background:white"> MSN/Skype/Email: <a href="mailto:grogers@vk6hgr.echidna.id.au" target="_blank" moz-do-not-send="true"><span style="color:purple">grogers@vk6hgr.echidna.id.au</span></a></span></pre>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white">______________________________<wbr>_________________<br>
OZAPRS mailing list<br>
</span><span
style="background:white"><a
href="mailto:OZAPRS@aprs.net.au"
target="_blank"
moz-do-not-send="true"><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:purple">OZAPRS@aprs.net.au</span></a></span><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white"><br>
</span><span
style="background:white"><a
href="http://lists.aprs.net.au/mailman/listinfo/ozaprs"
target="_blank"
moz-do-not-send="true"><span
style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:purple">http://lists.aprs.net.au/<wbr>mailman/listinfo/ozaprs</span></a></span></p>
</div>
</blockquote>
</div>
<p><span style="background:white"> </span></p>
</div>
</blockquote>
</div>
</blockquote>
</div>
<p class="MsoNormal"><span style="background:white"><br>
-- <br>
Gavin Rogers mobile</span></p>
</div>
</div>
</div>
</div>
<br>
______________________________<wbr>_________________<br>
OZAPRS mailing list<br>
<a href="mailto:OZAPRS@aprs.net.au" moz-do-not-send="true">OZAPRS@aprs.net.au</a><br>
<a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://lists.aprs.net.au/<wbr>mailman/listinfo/ozaprs</a><br>
<br>
</blockquote>
</div>
<br>
</div>
<br>
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<br>
<pre wrap="">_______________________________________________
OZAPRS mailing list
<a class="moz-txt-link-abbreviated" href="mailto:OZAPRS@aprs.net.au">OZAPRS@aprs.net.au</a>
<a class="moz-txt-link-freetext" href="http://lists.aprs.net.au/mailman/listinfo/ozaprs">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a>
</pre>
</blockquote>
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