[time-nuts] chip scale atomic clock

Thomas A. Frank ka2cdk at cox.net
Sun Dec 27 23:31:06 UTC 2009


On Dec 26, 2009, at 10:36 AM, Robert Lutwak wrote:

> I pay pretty close attention to what people in this field are  
> saying, and I've never heard anyone say "we'll get to 1e-11 short  
> term stability at 1 second real soon now."
>
> 1e-11 at 1 second is the XPRO spec (and 2X better than LPRO or  
> PRS10). There are good (physics) reasons why those units all draw  
> 100X more power than a CSAC.
>
> CSAC is intended for portable battery-powered operation. Surely  
> your basement has the space and wallplug power to support an LPRO.  
> (p.s. don't cool the damn thing, heat it).
>
> The cats were much happier during the CsIII development (see http:// 
> home.comcast.net/~rlutwak). It was bigger and warmer. Any Cat-Nuts  
> out there who can help me find one with significantly lower SWAP?

You know, that gives me an idea...I could justify some interesting  
equipment if I assured the XYL that it was simply a cat bed heater.

As for this heat sinking of a Rb, might it be better to use a  
refrigerator?  More practical.

Tom Frank, KA2CDK





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