[time-nuts] Oscilloquartz 8601 Rebuild Question

[Bob Camp]

Hi

You want to match the original. That likely means a current drain a bit lower than shown in the specs. Depending on how it is set up, minimum power may not be reached for several hours.

Bob



On Jul 30, 2011, at 1:47 PM, ed palmer <ed_palmer at sasktel.net> wrote:

> 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
> 
> 
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