[time-nuts] AN/URQ-13 FE-15a oscillator question

[ed breya]

Paul, from your description, it sounds like it's not an outer and inner 
oven in the traditional sense, but that the extra heater is to improve 
things at the weak spot in the Dewar system - the opening, where the 
high-grade insulation is lost, and conductive things pass through. So 
maybe it should be called a "dual oven" or "Dewar-compensator" or such. 
The big question is how are they controlled, and what are the 
set-points. It could be that the one by the opening is variable, being 
set to somewhere between the desired inner temperature and ambient. Or, 
maybe that one is supposed to be 110 deg F constant, and if ambient goes 
higher, then so be it, and the specs may be looser. BTW are you sure the 
"110" figure is supposed to indicate a numerical temperature (regardless 
of units)?

Ed