FWIW: To run RTTY with my K2/100, I mounted a computer muffin fan with a
velcro tab to the heat sink over the PA's, blowing down. Heat sink
stayed cool to the touch at 80 W. Without the fan, it was too hot to
rest your hand on it. Understandable however that unless the fan is an
integral part of the heat sink, a mfr can't really include these effects
in their product specs.
73,
Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn
On 6/20/2017 11:01 AM, Howard Hoyt wrote:
> Hi Mike!,
>
> You are of course correct, and there is no reason not to do so when
> operating fixed near AC power. Usually the situation where people do
> not use fans is when they are operating portable and don't want to
> waste the power or have extra stuff to pack/set up. This is the reason
> our heatsinks are optimized for convective cooling, but they can show
> extreme cooling gains when using forced cooling.
>
> The reason we do not rate them with forced cooling is because the air
> temperature and speed are uncontrolled variables unlikely to be
> duplicated by users, whereas rating them for full convective cooling
> is much more conservative.
>
> Cheers & 73,
>
> Howie - WA4PSC
> www.proaudioeng.com
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