I have a Datum Rubidium Frequency Standard, which is a 1U aluminum
chassis that is about 2mm thick. It contains a LPRO and a 24V/5V power
supply with room to spare. I installed a Fury GPSDO and a small DC-DC
converter in the same enclosure. The top cover is vented. The chassis
stays slightly warm and the LPRO appears to work well even with moderate
HVAC cycling (as long as the chassis is in the rack with the door closed).
Scott
On 02/27/2010 04:30 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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