[ntp:questions] Home Time Server

David L. Mills mills at udel.edu
Tue Oct 9 23:28:18 UTC 2007


I have several antennas here, including Yagis, dipoles and longwires. 
Both PSTI/Traconex WWV receivers have dedicated outside longwire 
antennas and TCXOs. With the one I mentioned in my last message the DATA 
LED is lit most of the time. The receivers were made in 1988 by PSTI 
before they cashed out to Traconex. I borrowed them for testing, but 
kept them because PSTI didn't pay my consulting fees.

PSTI thought my advice on how to improve the product was impractical at 
the time. It isn't now; the proof is in the WWV audio driver.


Richard B. Gilbert wrote:
> David L. Mills wrote:
>> Evandro,
>> I don't know what non-GPS referece clock you are using, but my two 
>> PSTI/Traconex WWV clocks are within about 1 ms and the WWV audio 
>> driver in the NTP distribution is usually better than 0.2 ms. Only my 
>> ancient Heath G1000 WWV clock can be blamed for greater than 500 ms 
>> and that because of a runt antenna. Sadly because of UPS power line 
>> noise, WWVB does not work here any more.
> Performance of the PSTI/Traconex WWV clocks depends strongly on the 
> quality of the signal you provide.  Using the whip antenna provided, in 
> my home in New Jersey, I've noticed errors of up to 50 ms when compared 
> with my GPS and internet servers!  Performance seems best during the 
> hours of darkness.  YMMV!

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