[time-nuts] Rack-mounting an LPRO?
paulswedb at gmail.com
Sat Feb 27 23:41:39 UTC 2010
I agree that thats not really an effective heat sink.
On Sat, Feb 27, 2010 at 6:12 PM, Bob Camp <lists at rtty.us> wrote:
> 1mm is pretty thin for a heat sink made of steel. You might consider an
> aluminum plate around 4 mm thick and the length and width of the case to act
> as a heat spreader.
> The LPRO probably already has the tape on the bottom of it. The tape may be
> in fine shape. If it's not, scrape off what remains and use a normal thermal
> grease (heat sink compound) between the bottom of the LPRO and the heat
> spreader. You also should fill the gap between the heat spreader and the
> steel case with something. I would use some sort of thermaly conductive
> epoxy. You don't need the silver loaded stuff. Ceramic loaded should be ok.
> On Feb 27, 2010, at 5:30 PM, Paul Boven wrote:
> > Dear time-nuts,
> > I've just bought a used LPRO-101 which should get a permanent home inside
> an instrument rack. I've also found a very nice 1U high metal case, and a
> fitting 24V 1U power supply - leaving plenty of room for a distribution amp
> and a microcontroller to log things like lamp and Xtal voltage.
> > The rackmount enclosure is 1U high, and seems to be made of 1mm thick
> galvanized steel. Would that make a good enough baseplate for the LPRO?
> Would I need to do anything to improve the thermal contact between the
> rubidium oscillator and the baseplate, and if so, any recommendations on
> what to use there? The LPRO "User's guide and integration guidelines"
> recommend 2degC/W thermal resistance (for up to 50degC ambient), and using
> some special thermal tape that will probably be very hard to get at these
> days. If any of you has already put something like this together, I'd be
> very interested in your suggestions.
> > Regards, Paul Boven - PE1NUT
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