[Elecraft] [K3] K3 fan noise, part XXLIV

[Don Wilhelm]

To compare apples to apples where it is important, compare the CFM 
rating at low, medium and high speeds.  The RPM is only indirectly 
related to the air moving capabilities.  Things like blade shape, 
ducting, and other similar parameters all contribute to the fan 
efficiency and the amount of noise that is induced at any fan speed.

73,
Don W3FPR

Joe Planisky wrote:
> That's a 12MB (medium speed), not a 12LB (low speed).  3700 RPM max vs  
> 2800 RPM max.  Not the same thing.
>
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