[Elecraft] KPA500 question about cooling

[Don Wilhelm]

Those who know something about fluid dynamics can also tell you that if 
the air flow is restricted, the fan speed will be a bit higher (for any 
given KPA500 selected fan speed) - it is because the fan is not doing as 
much work to move air.
Try an experiment with any fan - partially block the air flow and 
observe that the fan speed increases.
That is more noticeable if the outlet side is blocked - so do maintain 
the proper clearance at the back of the KPA500.

73,
Don W3FPR