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

[Bob Camp]

Hi

To fast on the send button (again ... ) sorry for the double post. 

By far the easiest way to do a first order check: 

1) Run it for a day to let it stabilize. 
2) Change the voltage from 20 to 24 (or what ever)
3) Monitor the change in frequency until it stabilizes
4) Look at what you got (likely after 5 to 30 minutes depending).
5) Step and repeat to see if it's consistent. 

If you get a delta F that does not bother you - move on. 

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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