[time-nuts] HP 10811 Response I Replies

Magnus Danielson magnus at rubidium.dyndns.org
Fri Sep 23 07:45:14 UTC 2011


On 23/09/11 05:40, Richard (Rick) Karlquist wrote:
> On 9/22/2011 5:17 PM, ws at Yahoo wrote:
>>> Within minutes the frequency changed more than the spec
>>
>> For humidity to get thru something like that it takes weeks or more it
>> does it at all.
>> That fast of reaction, Sure sounds like some other effect like blowing a
>> little air on the case or loading the osc output with water in the
>> output cable etc, etc.
>> I think it is safe to say the effect was not due to water inside, unless
>> there was a hole.
>>
>> ws
>
> The effect we saw was like parts in 10^8 of something. Way too big
> to be related to output loading or air on the case. In any event,
> the air blowing on the case was constant during the test.
> We saw that when we didn't even try to seal the 10811 and also
> when we tried to seal it.

Blowing on the case? Did you consider the increased cooling that higher 
humidity provides?

Cheers,
Magnus



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