[time-nuts] Thunderbolt mounting

Chris Albertson albertson.chris at gmail.com
Fri Jul 13 04:38:27 UTC 2012


On Thu, Jul 12, 2012 at 6:56 PM, Said Jackson <saidjack at aol.com> wrote:

> Sorry guys, but using a fan on a thunderbolt is nuts. Not time nuts.
>
> First you get ADEV humps as discussed here. Then the fan vibrations will
> show up as massive spurs in the phase noise plots. Then the fan's
> commutator emi will go everywhere. Then the fan may modulate the supply
> voltage going into the thunderbolt if the same supply is used -not good.
>
>
Have you actually tried using a fan and measured EMI and the supply voltage
modulation.  I'm curious how much the fan pulled down the power supply.

Those things could happen but at what level?  Is the effect even
measurable?   I think it might be like standing of a single sheet of paper
so you are taller and can see farther.  Yes in theory it works but the
effect is small.

Chris Albertson
Redondo Beach, California


More information about the time-nuts mailing list