[Elecraft] KPA-500 fan noise

[Richard - HB9ANM]

If you set fan speed to Level 1 in the first place, it will run 
continuously and avoid wide temperature variations.
I can work pileups in RTTY at 500W and the fan goes into Level 2 on rare 
occasions and for a short time only.
IMHO, the NORmal setting is not the best one. Level 1 (constant) is very 
quiet and a better choice to protect the Mosfets.

73
Richard - HB9ANM