[time-nuts] Questions about HP 5370B

Greg Burnett gbusg at comcast.net
Tue Sep 14 09:02:54 UTC 2010

John Miles wrote:
...There are no such concerns with the 5370B as far as I'm aware.  Nothing 
there runs very hot except the linear regulators themselves, which are
externally heatsinked.


John - Santa Clara designed the 5370A/B such that the fan sucks external air 
into the box. The box is designed so that a portion of this air loops around 
and then vents back to the outside through the three holes in the external 
heatsink. This helps cool the external heatsink, as the venting air blows by 
the three center fins of that heatsink assembly.  Having said that, if you 
end up running your particular 5370B in the long-term without a fan (or 
without a top cover), let us know how you come out with it.  :-)


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