[Elecraft] K2/100 overheating?

[Ron D'Eau Claire]

Hi Ken: 

The fan should be drawing air IN, not blowing it out. Is it oriented correctly (label out) and wired correctly? 

Normally the K2/100 at full 100 watts out for a long time before the temperature gets too high. I did some thermal testing some years ago that had a brick on the key up to half an hour at a time. 

Did you carefully set the transmit bias current as described in the assy manual? See page 51 of the current (Rev H2) manual. Excessive bias current will certainly result in excessive heat. 

73, Ron AC7AC


-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of N4KS via Elecraft
Sent: Friday, May 19, 2017 5:01 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] K2/100 overheating?

 I recently added the KPA100 to my K2. The heat sink gets VERY hot at any power level above 11 watts (that's when the amp kicks in). The fan is running at high speed and pulling air OUT of the box. Just wondering if this is normal.
Ken/N4KS
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