[Elecraft] K2/100: Power Control Defective

[Richard]

A fellow ham is having the following problem withhis K2:

A year ago, we installed the KPA100 which worked fine until recently.

Suddenly, the TX Power Control failed and the K2 will deliver either 
9-15 W or - with the 100W PA switched on - up to 150 W into a dummy load.

I suspect there is an issue with the TX-ALC, but no defective diode was 
found.

I personally don't own a K2 but is there a TX gain calibration procedure 
similar to the K3?

Suggestions welcome - thanks in advance.

73

Richard - HB9ANM