[time-nuts] OXCO Issues -- Latest
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.
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