[time-nuts] Should a double oven XO be thermally isolated or just draft protected?

[Erik Kaashoek]

I'm trying to build a stable reference for a phase noise meter project 
and have acquired a double oven XO that boosts high short term stability 
(below 1e-12/s). But the spec also states that, even with the double 
oven, there is still substantial impact of environmental temperature 
changes (below 1e-8 changes over the normal operating temperature range) 
so I was wandering if its good practice to try to thermally isolate the 
DOCXO or do you run the risk of overheating as it always may burn some 
power and its better to only shield it from draft?