[time-nuts] HP CBT Cutaway?

[Richard (Rick) Karlquist (N6RK)]

When I was at HP, I remember they used to 
cut the ends off the case by mounting it in
a lathe and turning down the seam where
the end cap attaches to the center section.
This was to rebuild tubes that didn't work
as built.  (NOT to rebuild used tubes).  Seemed
like Norm in the machine shop spent a lot of his time
cutting apart tubes.  I suggest that you
should do this first, and then you can see into
the tube and it should be obvious where you can
cutaway the center section without damaging the
working parts.  Don't get any loose pieces of steel
near the magnets!

Rick Karlquist N6RK

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Jim Miller
> Sent: Friday, August 19, 2005 1:13 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] HP CBT Cutaway?
> 
> 
> Hi,
> 
> Has anyone ever seen a cutaway of an HP 5061 CBT? I recently bought a  
> "Serviceable" 5061A from Gov. Liquidation that turned out to be  
> nothing but an empty, gutted carcass containing only the CBT and the  
> time of day clock option.  To add insult to injury, the CBT's leads  
> had been close-clipped 1/2" away from the tube body.
> 
> In order to make some lemonade from a lemon, I'd like to cut open the  
> CBT outer case to expose the innards as a show-and-tell piece for  
> time-and-freq presentations at the local ham club and high school  
> electronics demonstrations.  Any suggestions on where to make the  
> incisions in the case? Is it worth the trouble? I have a machine shop  
> that can do the cutting.
> 
> Thanks,
> 
> Jim
> N8ECI
> 
> 
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