[time-nuts] Z3805A cooling requirements?

Mark Spencer mspencer12345 at yahoo.ca
Mon Dec 24 14:58:24 UTC 2012

Volker et al..

I placed a small muffin fan near one of my Z3805's.   The modest air flow seems to have some affect on the units operation.

I've collected some ADEV data as well but don't entirely trust it yet.  

Amongst other issues I had a lengthy power failure at my residence four days ago so both my Z3805's have only been running for a few days and most of my other references and all my counters also lost power.  My Z3805's seemed to take several weeks to settle down when they were first powered up.

My FTS 1050 has a separate backup battery system and has been running for a few years so I've used it as the reference for this test.

All that said I've included the Adev plots with this email.  Removing the air flow seems to cause more issues than adding it.  It took a number of hours for the unit to settle down after the air flow 
was removed.  I wouldn't place much emphasis on the Adev data for Tau's of less than 80 seconds.

While collecting the data used to generate these plots at times I also compared the reference I was using to two other references to give me some comfort that the reference wasn't drifting.

I'll be interested to see any additional data from Volker.




Mark Spencer

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