On Tuesday, August 02, 2011 10:41:30 AM Erik Christiansen did opine: > On 01.08.11 08:10, gene heskett wrote: > > The idea being to use the fan to distribute the heat so no external > > openings need be used, just the hot box itself. I might check to see > > if Dave has any more of those heat sinks I flattened the bottom of so > > he could test transmitter modules, that would be ideal and no fan > > required at all. > > Gene, if that's the way to go, can you get your hands on some cheap > heatpipes? (http://en.wikipedia.org/wiki/Heatpipe) > > Last time I had my hands on some was in 1973, but they should be much > better than a closed-off internal fan for thermally connecting hot chips > in the middle of the PCB to a finned enclosure. A fan can still be used > to move air over the external fins. > > OK, they're more awkward to work with, unless close to the right length, > and there's nothing in the way. (But it can't be a lot worse than RF > plumbing, can it? ;-) > > Erik
I considered that, very briefly. In rf, we have connectors, but I've never seen a heat pipe that one could freely bend, or install connectors to extend it. Liquid CPU coolers might help, but far less hassle to put in the fan and filtration & expect to watch and replace the filter occasionally. Then to add insult, after I ordered the C1G breakout board, I find it needs a separate 5 volt half amp psu. I have enough line cords in this lashup now! So an LM317 gets bolted on someplace. But this box has lots of 1/8" & 3/16" thick alu to bolt it to. With Dave checking the old Townsend ch 46 transmitter for heat sinks we can salvage, to bolt on the outside, I expect it will work. Cheers, gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Conscious is when you are aware of something and conscience is when you wish you weren't. ------------------------------------------------------------------------------ BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos & much more. Register early & save! http://p.sf.net/sfu/rim-blackberry-1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
