[time-nuts] Re: Micrel (Microchip) PL-500 Low Phase Noise VCXO

[Julien Goodwin]

On 14/9/21 1:42 pm, Lux, Jim wrote:
> On 9/13/21 7:36 PM, Julien Goodwin wrote:
>>
>> On 14/9/21 12:59 am, Chris Caudle wrote:
>>> On Mon, September 13, 2021 3:31 am, Julien Goodwin wrote:
>>>> https://www.microchip.com/en-us/product/PL500-16
>>> ...
>>>> I've designed as an OCXO
>>> What temperature are you planning on running the oven?  If that
>>> device is
>>> going inside the oven, watch the max operating ambient spec if 85
>>> degrees.
>>>
>> Yep. Sadly my use case includes "in an enclosure outdoors in the
>> Australian summer" so I can't use a low temperature oven.
> 
> 
> 
> You just need to move to Coober Pedy, and set your lab up in a dugout,
> which will keep things at a reasonable temperature.
> (Although, I must confess, I didn't meet anyone in Coober Pedy who
> claimed the advantages for time-nuts - maybe a marketing opportunity for
> the city?)
> 
> 
> 
> otherwise, you're in the "design for 50C"Â  bucket, like us in SoCal.

50c *ambient* though (and even here in Sydney we've hit 46c), in outdoor
enclosures you can easily end up being 20c+ higher, even with
ventilation. A bunch of friends of mine have worked for service
providers here that used to run networking kit in such enclosures.