Thinking about it Poul, That explains why the preferred "frying pan" is made of cast iron in deference to the modern light weight ones they sell these days; better temperature control across the cooking area. I knew I was saving old used cast iron pans for a reason. Now I know what I am going to do with them.
And I agree, people are not thinking about the reason for the heat regarding the Rb. Everything in its proper balance. Bill....WB6BNQ Poul-Henning Kamp wrote: > Cooling Rb's is a much misunderstood discipline. > > Most Rb's have a specified "base plate temperature range". > > For instance the PRS10 specifies -20..+65°C > > Cooling Rb's should happen only through the base-plate. > > Cooling other surfaces creates unwanted temperature gradients inside > the Rb unit. > > The colder you run a Rb, the more power it uses to keep important > bits inside warm. > > Running it near the top end of the range wears out the electronics > in it faster. > > No matter what kind of cooling, it is important that it offers > sufficient cooling capacity for the internal ovens to have a > margin to work with. > > For frequency stability, you should strive to have a constant > baseplate temperature. > > Putting a fan on anything, will generally speed up and amplify the > effects of any ambient temperature changes. > > For optimal frequency stability, you want to do is mount > your Rb on a huge lump of iron which you can keep at a > constant temperature around 35-40°C by natural convection. > > Iron is better than Cu/brass/Al because it conducts heat slower and > less eagerly, thus attenuating ambient temperature fluctuations. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
