[time-nuts] Oscilloquartz 8601 Rebuild Question

[ed palmer]

I'm rebuilding an Oscilloquartz 8601 oscillator that has a smashed 
Dewar.  The 8601 is basically the same as an 8600, but with a different 
connector arrangement.

Since I can't replace the original Dewar, I'm trying various vacuum 
flasks to see which one works best.  The differences are related to the 
size (how much room for a foam plug) and material (glass vs. steel).  Am 
I correct in thinking that 'best' means minimizing the current drain?  
I'm thinking that minimizing the current drain means minimizing heat 
loss to the external environment and therefore most stable performance.  
Or should I try to match the thermal characteristics of the original 
flask and plug?  I could approximate this by adjusting the thermal 
characteristics to obtain the same current drain as stated in the 
specifications.

Of course, if you go too far in reducing the current, the oven could 
overheat.  The oscillator includes a precision thermistor to monitor the 
temperature of the oven to prevent this.

Any comments?

Ed