aluminum heatsink anodizing
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From: Eeyore on 19 Dec 2008 17:24 "Capt. Cave Man" wrote: > Eeyore <rabbitsfriendsandrelations(a)hotmail.com> wrote: > > > >Now do the sums kiddie ! Heatsinking is an expert area that clearly no-one else > >here has much of a clue about. I've been studying it for over 30 years. > > You're an idiot. My last large sink product was a 1500W supply for a > CAT scanner for Philips. We used a custom extrusion Totally unneccessary. And heavy. Graham
From: Eeyore on 19 Dec 2008 17:26 John Larkin wrote: > No insulators at all of course... the heatsink is hot to the load. Isn't that just what I recommended ? > This is in a 17KW peak-output MRI gradient driver. And the dissipation in the devices is ? Graham
From: Eeyore on 19 Dec 2008 17:28 Archimedes' Lever wrote: > Those are the same type of spring clip hold downs that we used. I quite like those too but I prefer TO-3. You can run them hotter. Graham
From: Eeyore on 19 Dec 2008 17:39 Rich Grise wrote: > NoSPAM wrote: > > > > ... Obviously Eeyone has never blown air > > across a spoonful of hot soup to cool it faster than just letting the > > spoon sit in still air! > > > Not applicable - that's primarily evaporation. Very true. Graham
From: Eeyore on 19 Dec 2008 17:45
Phil Allison wrote: > "Adrian Tuddenham" > > > > A point not often appreciated is the possible heat gain when a heatsink > > is operated in bright sunshine. A surface finish which is a poor > > radiator/absorber of radiant heat will work better in those > > circumstances. > > ** Only a complete dope would not find some way to shade the heatsink from > direct sunlight on a hot day. There's no shortage of dopes. Graham |