At 7:31 PM +0000 1/23/10, [email protected] wrote:
Date: Sat, 23 Jan 2010 14:31:40 -0500
From: Bob Camp <[email protected]>
Subject: Re: [time-nuts] Variable Conductance Heat Pipes for
temperature control
To: Discussion of precise time and frequency measurement
<[email protected]>
Message-ID: <[email protected]>
Content-Type: text/plain; charset=us-ascii
Hi
After a quick read, I still don't see much on just how good the
thermal control can get. Of course I could have missed that page ...
The performance of the Rb oscillator VCHP heatsink is in the book I
left at work. It was pretty good, especially considering that the
heatsink system is wholly passive and electronics-free.
Joe
Bob
On Jan 23, 2010, at 1:33 PM, Joe Gwinn wrote:
> Back in December 2009 I proposed (in "Re: [time-nuts] Cheap
Rubidium (heatpipe cooling for)") use of heat pipes to stabilize the
temperature of a Rubidium oscillator within an insulated box.
Turns out I was anticipated by ~40 years.
While standard heat pipes offer near isothermality , they don't
offer temperature constancy as the heat flow and/or condenser
temperature vary. However, there are hints in the literature that
near constant temperature can be achieved, complete with pictures
of a Thermacore International product used to control the
temperature of a Rb oscillator used in a cell phone tower or the
like.
>
[snip]
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