>
>>- there is a definite difference
>>in temp. between the side of the valve nearest to the
>>fan and the side furthest away.
>
>? Greetings, Chris
> 1. how did you measure these temperatures?
> 2. does your amplifier use a split chassis?
> 3. how tall is the tube?
> 4. what is the diameter of the fan?
>
>Also, 'mo air is sometimes not 'mo bettah.
>The guys at Heath obviously took some aerodynamic laws
>and principles into account when designing SB amp cooling
>schemes. As the stream of air is sped up as it passes over
>the tube envelope, a low pressure boundary starts appearing
>between the envelope and the air stream. This is what gives an
>airfoil lift. The wind from the cooling fan must be of such velocity
>as to not cause this separation. If the velocity is too high, the air
>will not be touching the envelope all the way around. This is where
>the "hot spots" and eddys also begin to form, which we also wish
>to avoid.
>
/\ So, in other words, choose a quiet fan.
cheers, Phil
- R. L. Measures, 805.386.3734, www.vcnet.com/measures.
end
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