>- 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.
(((73)))
Phil, K5PC
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