[Elecraft] K3 - Wild Fan Action

[Ken K3IU]

Hi Dave:

Go to CONFIG: KPA3 . I should say "nor." Rotate the VFO A knob clockwise 
and select what speed (Fn1 - Fn4) you want the fan to continuously run 
at. Exit from CONFIG menu.
A quick check shows that everything seems to work fine in that 
configuration. I do NOT know if the fan will now speed up if a certain 
preset temp is reached.

Thanks for the contacts in NAQP.

73,
Ken K3IU

Dave Hachadorian wrote:
> I used a pair of K3's this weekend in the NAQP CW contest. 
> This is a low power contest, so the amps were turned off, 
> the K3's were set for 100 watts instead of their usual 50 
> watts, and I was wearing lightweight headphones, so I could 
> hear any background noise in the room.
>
> I found that whichever K3 was being used to call CQ and run 
> stations had its fan constantly throttling up and down. Both 
> radios acted the same. Most of the time, when I went into 
> transmit mode, the fan would slow down! Maybe the 
> temperature comparator is sensitive to small changes in 
> supply voltage? The p.s. is a 35 amp analog Astron, and only 
> one radio is transmitting at any given time. At any rate, it 
> was mildly distracting. Maybe there should be some 
> hysteresis built into the fan controller. Maybe there could 
> be a "constant run" fan setting for contest use. I'd rather 
> have the fans run constantly, rather than listening to them 
> spin up and down.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>   
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