Well, there are laws of economics for manufacturers, too. And they are at times more rigid than those in physics. <grin>
Yes, I've been doing thermal design for 25 years. You give me a big enough pile of money, I'll deliver your target temp at target location, with </= max specified "noise". 73, ______________________ Clay Autery On 2/3/2016 3:43 PM, Lynn W. Taylor, WB6UUT wrote: > So, what is noise? It's energy. > > Some of it goes into the fan and moves air, some is from turbulence > off the blades, and some heats the bearing. > > There are quieter fans that still move lots of air. They have > carefully shaped blades and all of the flashing is cleaned off so the > edges are smooth. Extra steps that cost more. > > I've replaced a lot of computer fans. If the computer sits next to > me, I get quiet ones. If it's in a server closet, I use higher-speed, > noisy fans, preferably ones with a very high MTBF, because I won't be > there to hear the server get quiet. > > 73 -- Lynn > > On 2/3/2016 1:26 PM, Clay Autery wrote: >> You can BEND the laws of physics, but you can't break them. Within the >> package size dictated, you can only move so much air in a given >> timeframe, "silently". > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to caut...@montac.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
