[time-nuts] OXCO Issues -- Latest

Ed Palmer ed_palmer at sasktel.net
Sun May 12 13:59:12 EDT 2013

When you've got it powered up again, you should try adjusting the 
trimpot.  You should be able to find a spot that gives you a frequency 
minimum, assuming this is an AT crystal.  This will minimize sensitivity 
to temperature change.  There's a slim chance that a shift in the 
temperature set point could be at the core of your problem, but it would 
be a rather extreme case.


On 5/12/2013 9:36 AM, Frederick Bray wrote:
> Well, I decided to make the "Y" incision and pulled the circuit board 
> out of the oven.  (Photos later after I crop them.)
> Yes, the trimpot is part of the circuit associated with the thermistor.
> My plan is to check the resistors (surprisingly most are carbon film 
> except those in the thermistor circuit), look at the circuit board 
> under a magnifier, and stick it back in the foam for testing after 
> making any repairs.
> Thanks again for the continuing comments and advice.
> Fred

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