aluminum heatsink anodizing
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From: Fred_Bartoli on 20 Dec 2008 18:59 "Eeyore" <rabbitsfriendsandrelations(a)hotmail.com> a �crit dans le message de news:494D5B14.8387339E(a)hotmail.com... > > > Fred_Bartoli wrote: > >> Plus such an IQ (at least for those having to bragg about it) seems to >> generate a lot of convection under the skull... > > When dealing with sub-100s a line has to be drawn. > QED > Arguing with my figure btw ? > QED > > Grham
From: John Fields on 20 Dec 2008 20:45 On Sat, 20 Dec 2008 13:02:07 +0000, Eeyore <rabbitsfriendsandrelations(a)hotmail.com> wrote: > > >John Fields wrote: > >> Eeyore <rabbitsfriendsandrelations(a)hotmail.com> wrote: >> >Archimedes' Lever wrote: >> >> >> >> Having your already custom heat sink hard anodized does not add that >> >> much to the cost of the part. >> > >> >I dare say not but it makes for a very heavy part for one. You can throw my PA >> >assemblies to one other without danger of being injured. >> >> --- >> First off you don't know the difference between conduction and >> convection, > >Yes I DO. Convection is what happens with the type of central heating radiators we have >here and amps like this. >http://www.behringer.com/A500/?lang=ENG >See the fins either side ? --- Yup, and there _is_ some convection going on there, but not a lot since the transport mechanism for that is kind of slow since it's depending on the velocity of the air transiting the heat sink to remove heat from it. Why do you think the heaters in your flat are called "radiators" instead of "convectors"? Probably because you can feel the heat from them without having to be in a hammock strung above them. --- >> and now you think that anodizing dramatically increases the >> weight of a heat sink? > >NO, I said extruded heatsinks are considerably heavier than fabricated ones. And less >efficient at transferring heat when using my design. The anodising is a non-issue. --- One would think that, being English and, allegedly, educated, you'd know how to use your mother tongue in order to avoid misinterpretation. Apparently, though, even after your having brandished your alleged high IQ scores as a sort of, "I'm better than you." ploy you cannot and you fall back on the: "This is what I really meant" trick. After the fact, of course. Just like paying to see how the magic trick was done and then, after having seen it done, claiming that it was so simple you knew how it was done all along. JF
From: Capt. Cave Man on 20 Dec 2008 21:44 On Sat, 20 Dec 2008 22:47:13 +0000, Eeyore <rabbitsfriendsandrelations(a)hotmail.com> wrote: > >Extrusions are typically very poor radiators not least due to to fin masking. You're an idiot. The sink I refer to has no fins. It is just a box.
From: krw on 20 Dec 2008 23:32 In article <494D7528.7DD50684(a)hotmail.com>, rabbitsfriendsandrelations(a)hotmail.com says... > > > krw wrote: > > GARBAGE Wow! Seven letters. You're showing that famous 194 IQ again, eh? -- Keith
From: Rich Grise on 22 Dec 2008 14:22
On Fri, 19 Dec 2008 16:38:27 -0800, John Larkin wrote: > > AlN is in the ballpark of 150 w/m-K, close to aluminum itself and not a > lot worse than BeO. In modest quantity, custom AlN insulators aren't > terribly expensive, close to the high-end sil-pads as I recall, but with > 40x or so the thermal conductivity. Is it possible to "nitridize" the aluminum, laying down a ~1 mil film of AlN, a la anodizing? Thanks, Rich |