searching for a wide alpha cpu heatsink (2nd request)

[Hoover, Tony]

Interesting.  All my LX's and SX (and even my EB64+, back in the day)
all had 3 wire fans.  I thought it was required.  IIRC, You could use a
PC fan, but you have to switch the power and tach lines (I think, check
pin-outs before taking my word on that).  I remember that I did re-wire
a PC fan for one of my alphas.


I guess if you have something to generate psuedo-tach pulses, you could
passively cool an alpha (with a large enough heat-sink).  I'll  be
interested in hearing the outcome.

If you know a machinist, you could have him build a heat sink for you
out of a block of aluminum.  Remember, surface area is the key, so use a
small mill to make lots of fins.


Good luck

T

On Mon, 2008-11-10 at 17:59 -0500, Jay Estabrook wrote:
> Hi, Tony,
> 
> He's looking to do this to an LX164, and mine only has a 2-wire fan,
> so I think it may be OK?
> 
> --Jay++
> 
> Hoover, Tony wrote:
> > You still have to have a fan.  Alpha's don't run if it doesn't detect
> > pulses on the tach line for the CPU fan.
> > 
> > T
> > 
> > 
> > On Mon, 2008-11-10 at 18:35 +0100, Alexander Huemer wrote:
> >> Marc Schlensog wrote:
> >>> On Mon, 10 Nov 2008 17:00:18 +0100
> >>> Alexander Huemer <alexander.huemer at sbg.ac.at> wrote:
> >>>
> >>>
> >>>> hi,
> >>>>
> >>>> i got some offers from several people here on the list.
> >>>> thanks a lot for that!
> >>>> some people said they wanted to take a look in their basements or the
> >>>> like. so, here is my second request: does anybody have a WIDE alpha
> >>>> heatsink for me?
> >>>> wide means > 5.5cm or 2.2in.
> >>>> ideal would be somethink like
> >>>> http://www.tbcs-online.de/e-bay/CPU/KN610-CA_SMP_1.jpg
> >>>> that should be ~10cm or 3,9in wide.
> >>>>
> >>> What are you trying to do? Turn your LX into a space heater?
> >>>
> >>> _______________________________________________
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> >>>
> >> no, i am trying to cool my alpha with less noise.
> >>
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