[time-nuts] new clock
alexpcs at ieee.org
Wed Jul 23 08:17:24 EDT 2014
it does need a different design, but a buried oscillator, 5 to 8 meter
deep in the garden has the best temperature stabilization, just don't
turn thee power off, but that could be done using the old Greek
water-clock principle, the spill over stabilizer. In the Bay Area
[California] the soil's temperature is around the year approximately
17C° ±0.01C° if you go further down it will be even more constant,
without any heating power and control loop....
On 7/22/2014 6:43 PM, Bob Camp wrote:
> A lot depends on the oscillator. My fine old GR rack mount took most of 9 months to settle most of the way. It was still dropping in a year after that when I stopped watching it. Some of my T-Bolts took a week, some took a couple months….
> Best thing you can do with any OCXO is just leave it on power.
> On Jul 22, 2014, at 7:53 PM, paul swed <paulswedb at gmail.com> wrote:
>> Agree with Marks comments.
>> On Tue, Jul 22, 2014 at 5:25 PM, Mark Sims <holrum at hotmail.com> wrote:
>>> An oscillator can take many weeks to settle in after being powered off /
>>> shipped / abused / looked at cross-eyed / etc. It typically takes a
>>> Thunderbolt a month or two to settle down after being shipped from China.
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