[time-nuts] How to open solder-sealed OCXOs?

[EWKehren at aol.com]

If I want to reuse the can I use a torch, very fast several HP 5061 HV cans 
 mainly
Bert Kehren
 
 
In a message dated 2/2/2014 1:52:06 P.M. Eastern Standard Time,  
actast at hotmail.com writes:

It has  been a long time since I opened one of these, but at the time I 
remember  thinking it must be possible to open one of these without deforming 
it. Like  anything correct technique must be the key. Companies like Wenzel 
do this on a  daily basis and I would guess their technique would include a 
hotplate or hot  air reflow.  I think it is possible open with minimal 
deforming of the  metal case even with a regular solder station by wicking one 
side and and  sliding paper or other thin material to keep the solder from 
re-tacking when  you heat the next side.

Thomas Knox



> From:  albertson.chris at gmail.com
> Date: Sun, 2 Feb 2014 09:28:28 -0800
>  To: time-nuts at febo.com
> Subject: Re: [time-nuts] How to open  solder-sealed OCXOs?
> 
> I've not opened on of these cans but I  have opened some shield audio
> transmitters.  I just use my Hakko  temperature controlled solder station 
at
> a high setting and work my  way around the edge.  It can be done
> non-detructivly.   Solder wick helps a lot, use a bunch of it to get rid 
of
> the excess  solder.      The tiny tip on a temperature controlled  solder
> pencil does not look very powerful but the temperer controller  will crank
> up the watts to whatever is required for the  job.   I think mine limits 
out
> at 80W.  So just a  normal solder station can work.   It works for both 
the
>  muMetal cans and the steel cans
> 
> 
> On Sun, Feb 2, 2014  at 8:53 AM, <EWKehren at aol.com> wrote:
> 
> > Hi
>  > I use wire cutters like on a Morion I find a small lip and start 
pealing  it
> >  away. No trauma for the OCXO and simple.
> >  Bert Kehren
> >
> >
> > In a message dated 2/2/2014  10:07:36 A.M. Eastern Standard Time,
> > lists at rtty.us  writes:
> >
> > Hi
> >
> > If you are  tossing the can, a mill is by far the best way  to open up 
an
>  > OCXO. That of course assumes you have a mill...
> >
> >  It's not a  chip intensive process. You can easily do it with an X/Y  
table
> > on a drill  press. Of course that assumes you have all  of that  
stuff....
> >
> > Bob
> >
>  > On Feb 2, 2014, at 2:37 AM, Stewart Cobb   <stewart.cobb at gmail.com> 
wrote:
> >
> > > What's  the best way to open  an OCXO in the typical solder-sealed 
tinned
>  > > steel can?  I don't  mind destroying the can itself, as  long as the
> > innards
> > > are not harmed.  The  goal is to run some experiments with thermal
> > impedance
>  > > as  discussed here last week, and to ovenize parts of the EFC  
controller
> > for
> > > better stability.
> >  >
> > > Cheers!
> > > --Stu
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> 
> 
>  -- 
> 
> Chris Albertson
> Redondo Beach, California
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