[time-nuts] Is this ocxo salvageable?

[Francesco Messineo]

On Wed, Apr 9, 2014 at 8:58 AM, David McQuate <mcquate at sonic.net> wrote:
> The output looks differentiated, as would happen if the wire connecting the
> internal circuit to the output pin became open, leaving only a very small
> capacitance to couple the square wave out.

I agree, I had a similar problem on an oscilloscope input some time
ago. It was a cold solder joint.
It must definitely repairable as long as the shielding can be opened safely.

Regards
Frank  IZ8DWF

>
> Dave
>
> On 4/8/2014 11:46 PM, Chris Albertson wrote:
>>
>> My Bliley square wave 10MHz OCXO was working just fine for close to 30
>> hours until a few hours ago.  Now it puts out a rather noisy waveform
>> about
>> one volt peak to peak.
>>
>> Two questions:
>> (1) Are these things repairable, the metal can is soldered.
>>
>> (2) As you can see in the attached oscilloscope photo the OCXO still puts
>> out a strong 10MHZ component.  What is the best way to filter this and
>> recover a good 10MHZ square wave?
>>
>> In the linked photo, both channels are set to 1 volt per division.  The
>> large sine wave is from a Trimble Thunderbolt and the smaller wave is from
>> the failed ocxo  The EFC is left open (disconnected) and a you can see the
>> frequency is spot on 10MHz.
>>
>> https://www.dropbox.com/s/0gy3yobd4myi4vp/waveform.jpg
>
>
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