[time-nuts] LPRO Heat Sink?

Ian Sheffield ian.sheffield1 at tesco.net
Wed Sep 23 16:16:14 UTC 2009

Only the bit in the Rubidium tube has to be heated to a high temperature. 
The rest of the electronics have to
be kept within their spec.

In practice, I have found that mounting an LPRO on to a chassis, or using a 
finned heatsink only slightly larger than
the baseplate, will work ok.

There is a lot about this subject in the archives
----- Original Message ----- 
From: "steve gunsel" <sgunsel at verizon.net>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Wednesday, September 23, 2009 4:29 PM
Subject: Re: [time-nuts] LPRO Heat Sink?

> I'm new to this, but it sounded more like this is to be a thermal
> mass to minimize temperature swings.
> Why would you want to efficiently cool something that you are trying
> to heat and maintain at a constant temperature?
> just curious in Medina, OH
> At 11:12 AM 9/23/2009, you wrote:
>>At 10:51 AM 9/23/2009, J. Forster wrote...
>>>Monsterously thick will NOT do it. All that does is increase the heat
>>>capacity of the HS, not it's ultimate thermal resistance (W/deg).
>>>You need surface area...
>>You need both. A 10 m x 10 m piece of aluminum foil won't do much,
>>either, despite having a very large surface area.
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