I doubt if anyone was considering using the dinky little CPU fan.
A heatsink in my hand from an ancient 800 MHz Celeron is 3 x 2.5 x 1" with
25 fins. Using a 4.5" standard size muffin fan blowing transverse thru the
fins it will move a lot of heat. I'll leave it to those with more time on
their hands to compute all the variables.
Ive been up since 05:30 and off to bed.
Carl
KM1H
----- Original Message -----
From: "Steve Gorecki VE3RX" <ve3cwj@gmail.com>
To: <amps@contesting.com>
Sent: Friday, May 09, 2014 3:53 PM
Subject: Re: [Amps] Using computer CPU coolers on GI46b triode ?
Speaking from the CPU side of things, most CPU coolers cool a CPU that
gives off about 65-135W of heat. Usually not any more than that. Thus,
depending on the tube dissipation, you would need several CPU coolers.
Even
if you used a CPU water cooled cooler, they are still rated at about
125-150W maximum.
I just don't see how a CPU heatsink and CPU fan can cool a GI46b at full
power... However that said, a tube can run a lot hotter than any CPU can,
maybe double the temperature. Taking that into consideration, maybe a CPU
cooler can dissipate 250W of heat when running at tube temperatures...
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