EFRATOM LPRO-101 Rubidium 10MHZ Frequency Standard

Joseph Bento joseph at kirtland.com
Sun Apr 19 10:40:32 CDT 2009

I have an interest in older display technology such as Nixie tubes.   
On the Neonixie Google group, there have been a few people that have  
already built Nixie or Dekatron clocks around these surplus rubidium  

Pretty neat to see a "World's Most Accurate Clock" using 40 year old  
display technology.  To think I've always been satisfied with a WWVB  
sync (DCF-77 in Europe) when I could have my own little atomic  

Assuming I can attend Hamvention (very good prospect for a job in the  
coming week), I should be on the lookout for one of these oscillators.

I wonder what the current new list price for a rubidium oscillator?   
With the total saturation of wireless phone service, I imagine they're  
relatively inexpensive now.

Joe, N6DGY

On Apr 19, 2009, at 5:31 AM, Frank Gentges wrote:

> I seea bunch of people selling the Efratom LPRO-101 rubidium  
> standards on eBay and elsewhere.  One vendor shows they have 453 and  
> others are selling them in lots of 20.  Price seems to be $100 each  
> or less.
> Most likely, these are from cell phone sites that have either been  
> shut down, like AMPS, or others upgraded with newer standards  
> because these are not satisfactory.
> Anyone know what is going on?  Has anyone bought one of these?
> They would seem to be very useful to synchronize modern  
> communications signal processing techniques.
> Frank K0BRA
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