[time-nuts] Wenzel Oscillator Repair

[Bruce Griffiths]

Ed Palmer wrote:
> Hello,
>
> I have a piece of equipment with a Wenzel 5 MHz oscillator from the 
> Timekeeper <http://www.wenzel.com/pdffiles1/Oscillators/TMK.pdf> line.  
> It's functioning (that is, it's on frequency), but the output level is 
> 20 - 30 db lower than it should be.  The level seems to change every 
> time I turn it on.  By the way, this unit does NOT have an option to 
> disable the output.  I saw that was listed in one of the Timekeeper 
> documents that I found.
>
> It seems a shame to junk it when the repair is probably easy.  The 
> challenge is how to get into the thing in the first place.  Does anyone 
> have any hints & tips on how to open or repair one of these soldered-can 
> oscillators?  I found a page 
> <http://www.realhamradio.com/GPS-oven-journey.htm> that described 
> opening an HP 10811 from a Z3801A, but more ideas are always welcome.
>
> Thanks,
> Ed
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>   
Ed

Acts like it has a broken internal wire or similar.

The first thing to do is to determine how the base is sealed/connected
to the can.

It could be:

1) Soldered - unlikely (but not impossible) given the plastic foam
insulation within the can

2) Bonded with adhesive?

3) Spot welded?

Can you post close up images of the base and the other end with the
adjustment seal screw removed?


Bruce