Hello Time Nuts.
Where I work we had a small run of 15 phase analyzers made in the early
'90 with Efraton FRK just bolted on the 3/16" thick aluminum plate that
was also the left side of the chassis. The plate was around 12" by 12"
with a 1 inch hole for Rb lamp access and we applied a thin coating of
silicone heat sink grease between the FRK and the plate. The whole
instrument was then installed in a closed 19 inch rack. All but one of
the FRK's lasted the lifetime of the analyzer, around 15 years powered
24/7. There were no fans or other fancy cooling means. But I don't
imply that more modern Rb's will be so tolerant.
Claude
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