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Dear Paul,
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<div class="">In the meantime I build several stratum-1 server. There are GPS-based, rubidium controlled and DCF77.</div>
<div class="">See also my blog to various topics about NTP. <a href="http://blog.mayer.tv/" class="">http://blog.mayer.tv/</a> </div>
<div class="">DCF77 is very similar to WWVB. A DCF77 trasmitter is in Europe and sends on 77.5 kHz. </div>
<div class="">Offset for DCF77 is about 1000 times worse than GPS or rubidium based. </div>
<div class="">But if you have nothing else as stratum-1 in your LAN then it’s better than nothing. </div>
<div class="">DCF77 is easy to build. Propably WWVB too. </div>
<div class="">GPS is also straight forward. </div>
<div class="">Rubidium based NTP needs a lot of adjustment and scripting. </div>
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<div class="">// Hans </div>
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<blockquote type="cite" class="">
<div class="">On 31.07.2018, at 22:08, Paul Theodoropoulos <<a href="mailto:paul@anastrophe.com" class="">paul@anastrophe.com</a>> wrote:</div>
<br class="Apple-interchange-newline">
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<div text="#000000" bgcolor="#FFFFFF" class=""><font face="Georgia" class="">Scratch that. Remember: Always websearch first. Always websearch first. Always websearch first. ;)<br class="">
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tl;dr: WWVB is great for wall clocks - literal wall clocks. It's too unstable for computer use, for the most part. It'd be a curiousity to build, but not a reference to use.<br class="">
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<div class="moz-cite-prefix">On 7/31/18 12:18, Paul Theodoropoulos wrote:<br class="">
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<blockquote type="cite" cite="mid:ded7cd03-dfa9-8c83-b6e2-676b4ceadbc7@anastrophe.com" class="">
I ran across this:<br class="">
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<span style="color: rgb(17, 17, 17); font-family:
"Amazon
Ember", Arial, sans-serif; font-size:
13px; font-style:
normal; font-variant-ligatures: normal;
font-variant-caps: normal;
font-weight: 400;
letter-spacing: normal; orphans: 2; text-align:
left;
text-indent: 0px; text-transform: none; white-space:
normal;
widows: 2; word-spacing: 0px;
-webkit-text-stroke-width: 0px;
background-color: rgb(255,
255, 255); text-decoration-style:
initial;
text-decoration-color: initial; display: inline
!important;
float: none;" class=""><a class="moz-txt-link-freetext" href="http://a.co/7iIS21N" moz-do-not-send="true">http://a.co/7iIS21N</a>
- Canaduino WWVB 60kHz NIST Atomic Clock Receiver w/antenna<br class="">
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</span>Which has PPS output. <br class="">
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Would there be any value in attempting to get this working on a Raspi as a clock source? Or is the nature of a radio signal from well more than a thousand miles away from me too prone to fluctuations due to atmospheric conditions, interference, etc - compared
to my existing GPS based timeserver? It's cheap enough that I might give it a whirl regardless, just to see if I could do it.<br class="">
<pre class="moz-signature" cols="72">--
Paul Theodoropoulos
<a class="moz-txt-link-abbreviated" href="http://www.anastrophe.com/" moz-do-not-send="true">www.anastrophe.com</a></pre>
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</blockquote>
<br class="">
<pre class="moz-signature" cols="72">--
Paul Theodoropoulos
<a class="moz-txt-link-abbreviated" href="http://www.anastrophe.com/">www.anastrophe.com</a></pre>
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