[time-nuts] Z3805A cooling requirements?

Bob Camp lists at rtty.us
Mon Dec 17 02:10:34 UTC 2012


… and what I'm trying to say also comes from the real world...
If you start putting "stuff" on an OCXO, be careful about the case temperature and how the OCXO is spec'd. A few mm of dead air can make a good insulator. That can boost the case temp quite a bit.


On Dec 16, 2012, at 9:06 PM, Magnus Danielson <magnus at rubidium.dyndns.org> wrote:

> On 12/17/2012 02:47 AM, Bob Camp wrote:
>> Hi
>> The gotcha here is that an un-cooled piece of gear will heat up and cool down as it's work load changes.  There is no "magic bullet" that keeps the temperature constant with zero airflow in a normal design. Yes, I'm old enough to remember oil cooled computers. Still no constant temperature and you have turbulence.
> I agree that there is no "silver bullet", but my point was that sometimes you kill one property when you apply a solution to another problem. I am very well aware of heating problems and cooling my components, as this is part of my real world. But rather than isolating the full box, I'm talking about the TCXO or OCXO. Just putting a small wind-shield over it changes things a lot at times.
> Cheers,
> Magnus
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