[time-nuts] DIY FE-5680A lobotomy (disable temp compensation)

Bob Camp kb8tq at n1k.org
Fri Jul 4 13:45:47 EDT 2014


Yes, that’s one of the papers that shows their little chamber. I believe it’s mentioned in a couple of other places. Die cast boxes work pretty well for the enclosures. If you want to zero the gradient in the inner enclosure, put a small fan in there. That adds it’s own issues so it’s probably not really something you want to do. 


On Jul 4, 2014, at 12:46 PM, Scott Newell <newell+timenuts at n5tnl.com> wrote:

> At 07:23 AM 7/4/2014, Bob Camp wrote:
>> There is a bunch of stuff on the Wentzel site about their double wall mini-test chambers. It's probably the best approach to the gradient issue. You still have a gradient around the inner chamber / box, but it's consistent. You eliminate the coupling of the gradient to the ambient temperature.
> I dug around a bit and found this:
> http://www.wenzel.com/wp-content/uploads/Sub-pico-Multiplier.pdf
> Relevant?
> -- 
> newell  N5TNL 
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