[time-nuts] WWVB Contd.

Perry Sandeen sandeenpa at yahoo.com
Thu Oct 7 01:11:09 UTC 2010


Gents,

Wrote: All of this design and mod info is wonderful and great to fill an engineering project workbook.

Reply: True.  I have all the precision oscillators I need.  Four Rubidiums and two high stability crystal units.  Four nice sized salvaged HP cases that have working power supplies.  So all I have to do is install the oscillators then synchronize them with my two Lucent GPS receivers.

The VLF receiver is for a cross-checking the GPS and serving as a backup phase lock source.

Wrote:  You can spend about $500US and get a  complete HP working system including GPS antenna.

 Reply:  But you missed my original point: that I had all this stuff to use.

Wrote: which I have been monitoring to  10-12 for 14 mos now and it is stable.

Reply: True, mostly.  An article I had, but lost, explained that rubidium disciplined oscillators had better stability and explained why Allan deviation charts didn’t really give a true picture.  So that is why I want to synchronize mine.

Regards,

Perrier



      




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