[time-nuts] Rb cooling

[Chuck Harris]

For all of this attention to cooling the oven on the Rb standards,
has anyone seen any failures that are attributable to heat?

I sort of doubt it.

-Chuck Harris

EWKehren at aol.com wrote:
> I monitor and fan cool the base plate, stays nice and constant at 45 C
> which I can not say with heat sink only. I am considering lowering the base
> plate to 40 C. I have a heat sink on the base plate with the fan blowing over
> it. Makes good heat exchanger. I have experimented with heat pipes from Lap
> Tops  but never fit for mechanical reasons. May work with a LPRO's. Al my
> Rb's are  Efratom.
> A variable speed fan will reduce any ambient temperature influence. That is
>   why I chose to use a fan.
> Use a dual Op Amp for temp. control. Nothing special. Fans are $ 3.00 I
> have monitored points inside the Rb's and they are within 1 C over time.
> Bert Kehren