[time-nuts] CS reservoir depletion

Bob Camp lists at rtty.us
Fri Jan 14 12:15:25 EST 2011


Hi

Through the flips and flops of HP => Agilent => Symmetricom various products
have changed badges and locations. They appear to be consolidating cesium
standard production at the old FTS plant in Beverly(?) MA. Ultimately I
suspect they will redesign the product line to "rationalize" it. That should
be fun to watch. It would be much less fun to be caught in the middle of. 

Bob 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Jeffrey Okamitsu
Sent: Friday, January 14, 2011 9:18 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] CS reservoir depletion

..."We're still waiting to see if they can figure out
how make 5071 CBT's on the east coast, let alone
someone's garage."...

Rick...what did you mean by "on the east coast"?   Just curious.

73, Jeff W3KL
 Jeffrey K. Okamitsu, PhD, MBA
+1-609-638-5402 US Mobile Phone
+1-240-421-0692 GSM Mobile Phone 




________________________________
From: Richard (Rick) Karlquist <richard at karlquist.com>
To: scmcgrath at gmail.com; Discussion of precise time and frequency
measurement 
<time-nuts at febo.com>
Sent: Thu, January 13, 2011 12:09:01 AM
Subject: Re: [time-nuts] CS reservoir depletion

This is a popular FAQ that Cs engineers hear.

The correct answer (at least for HP/Agilent CBTs)
is that there is plenty of Cs in the tube, and
they don't fail because they ran out of Cs.  Something
else will always wear out first.

Regarding the general idea of rebuilding CBT's:

a used CBT is so "cesiated" that it is not practical
to rebuild it even on the regular CBT line.  Even
if it were, it is unlikely a time nut would have
the necessary high vacuum equipment.  It is pretty
serious stuff.  You also need to be able to laser
weld the case together when you are finished.  Sure
seems like a "don't try this at home thing".

We're still waiting to see if they can figure out
how make 5071 CBT's on the east coast, let alone
someone's garage.

Rick Karlquist N6RK

On 1/11/2011 4:06 PM, scmcgrath at gmail.com wrote:
> Now that we are discussing how to restore Rb lamps.
>
>  Has anyone given any thought to refilling or refluxing the Cs in depleted
Cs 
>tubes?
>
> Obviously opening would require high vaccum equipment - which is a totally

>separate category of nut (Or is it?)
>
> Scott
>
> Scott
> Sent from my Verizon Wireless BlackBerry
>
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