[time-nuts] Do you have HP5065A units for sale? If so, please contact me directly. Thanks!

Bob Camp lists at rtty.us
Sat Mar 20 00:20:06 UTC 2010


Hi

The FRK's as spec'd are pretty close to the LPRO's. The FRK's when brand new might be a lot better than spec. Based on used samples I'd guess the FRK exceed spec by a bit more than the LPRO's. 

Spec			FRK (typ)			LPRO (max)		FRK-L (spec)
avar 1 sec		2x10^-11			2.5x10^-11		1x10^-11
age / mo			3x10^-11			5x10^-11		1x10^-11
temp			5x10^-10			6x10^-10		1x10^-10
amb			-25 to 65			-25 to 70C		-25 to 65

 That's the "typical" FRK compared to the "max" LPRO. I suspect that's a reasonable way to look at them. The FRK-L are maximums. At 100 seconds the FRK's get town to 3 and 1x10-12. The LPRO should be doing 2.5x10^-12 at 100 seconds. 

I don't think that there are very many 5065's lying awake at night with nightmares about being less stable than a FRK or an LPRO. 

Bob


On Mar 19, 2010, at 7:44 PM, Dan Rae wrote:

> Robert Atkinson wrote:
>> Changing the thread slightly, where do the Efratom FRK- L and H fit in the hierarchy of Rb quality? I guess somewhere between the telco units and the 5065A. Opinions welcomed!
>> Robert G8RPI.
>>  
> Yes, but much closer to the Telco units than to the -hp- I'd have thought... 
> dr
> 
> 
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