[ntp:questions] Re: Refclocks for the Ultra-Cheap

David Schwartz davids at webmaster.com
Sat May 7 10:05:10 UTC 2005

"Jonathan Buzzard" <jonathan at uk.me.buzzard> wrote in message 
news:pan.2005. at uk.me.buzzard...

> That is some very cheap GPS receiver or a very expensive LW radio clock
> module you brought. A MSF/WWVB/JJY60 receiver should cost less than $50 to
> build and a DCF77 less than $40.

    GPS receivers are less than $100. The WWVB receivers I experimented with 
were around $80. You could find more expensive GPS receivers and cheaper 
WWVB receivers. GPS is just much more accurate and reliable.

> Regardless to that they make an excellent cheap backup to GPS.

    Certainly. No matter how accurate and reliable GPS is, it is possible 
for the system to fail.


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