[Elecraft] K3 cooling fan cycling

Paul Kirley pkirley at fuse.net
Wed Apr 13 10:48:37 EDT 2011


The fans that cool the K3's 100-watt amplifier are thermostatically controlled.
All thermostats have a temperature spread so that they do not cycle on and off
constantly; for example, a thermostat might be set to turn on a cooling fan at 
38 and off at 35.

I would like to suggest that consideration be given to expanding the K3's spread
between turn-on and turn-off temperatures to reduce fan cycling.  This might be
accomplished by allowing the operator to choose from a range of spreads (say, 1
degree to 5 degrees) in the Configuration menu.  

Presumably, the spread would adjust the turn-on temperature upward rather than
adjusting the turn-off temperature downward, as the turn-off temperature should
not be less than the ambient temperature.

Those who are bothered by fan cycling could then choose a larger spread to reduce
the problem.

73, Paul W8TM



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