[time-nuts] Re: 10811 behavior - addendum

[Bob Camp]

Hi

They are full up linear controllers. They even have a bit of an integrator on them.

Bob

> On Mar 1, 2023, at 1:55 PM, djl via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Bob:  I've forgotten, if I ever knew, whether the oven(s) on these devices are bang-bang controllers or linear controllers?
> Don
> 
> On 2023-02-28 06:41, Bob Camp via time-nuts wrote:
>> Hi
>> Since the others have chimed in on beat notes, I’ll poke at the power supply
>> stuff.
>> One really fun aspect of an oven controller is that it can indeed cycle without
>> the power supply being defective. Put a dozen or so parts on a test fixture and
>> feed them through a skinny piece of wire. You likely will get them all cycling.
>> The gotcha is that a defective contact can do pretty much the same thing as
>> that skinny wire. A failure of a component in the controller that
>> boosts it’s gain
>> also can put it into the same sort of cycling.
>> Spotting this is pretty easy. Look at the current meter on the power supply.
>> It will be cycling as the ovens do their thing. If it isn’t, cross
>> this off the list.
>> No, this would not be my first guess, still it is a possibility.
>> Bob
>>> On Feb 27, 2023, at 11:14 PM, Skip Withrow via time-nuts <time-nuts at lists.febo.com> wrote:
>>> I just noticed that the ripples in the phase plots are the slow cycle at
>>> about 1/10Hz.  Also, I'm pretty sure the power supplies are not the problem
>>> as the frequency of the ripples between the two 10811 units are slightly
>>> different.
>>> Skip Withrow
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at lists.febo.com
>>> To unsubscribe send an email to time-nuts-leave at lists.febo.com
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at lists.febo.com
>> To unsubscribe send an email to time-nuts-leave at lists.febo.com
> 
> ------------
> "It's always something."
> Roseanne Rosannadanna
> ----------------------"
> Dr. Don Latham  AJ7LL
> PO Box 404, Frenchtown, MT, 59834
> VOX: 406-626-4304
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe send an email to time-nuts-leave at lists.febo.com