[time-nuts] Supply voltages for the Efratom 105243 10MHz OCXO

[Bob Camp]

Hi

The only gotcha is that the temperature is offset by a fraction of a degree to compensate for various issues in the oven. Having it stabilize at 97.2 versus 97.5C is going to be tough to detect from a room  temp power check. Even if you could measure that delta, you still don't really know what's happening.  Weather the difference is  insignificant or impacts the temperature stability is the real question. 

Bob

On Mar 20, 2011, at 12:11 PM, Mike Millen wrote:

> Thanks, Ed.
> 
> Now why didn't I think of that?
> 
> M
> 
> 
> Ed Palmer wrote:
>> Measure the wattage used by the heater at 24V and room temperature.
>> This is what's required to keep the oven at the proper temperature.
>> Lower the voltage to 20V and see if the heater draws the same wattage.
>> As a second check, measure the current drawn at 20V at startup and
>> then after warmup.  The difference tells you how much headroom you've
>> got until the heater runs full on.
>> Ed
>> Mike Millen wrote:
>>> Many thanks to both of you.
>>> Is it safe to assume that the oven has its own temperature control
>>> system?
>>> I ask, because I'd prefer to run it from  approx. 20v instead of 24v.
>>> With a controller (& a room-temperature environment) I'm hoping that
>>> it would still be
>>> operating at its design temperature with a lower voltage.
> 
> 
> 
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