Hi Barry,

While using the KX2 in just about any digital mode above 5 W or so, we found the PA temp will reach thermal limit fairly quickly, which is why Elecraft rates the KX2 at 5 W in digital modes, and why we came up with an improved cooling solution.  (commercial content) Many owners who wish to run more than 5 W in digital modes have purchased the Pro Audio Engineering Kx22 Heatsink, which allows for an average (band and ambient temp dependent) 200-250% increase in transmit time before thermal limiting kicks in.

Cheers & 73,

Howie - WA4PSC
www.proaudioeng.com
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