[Elecraft] KPA3 failure?

[Don Wilhelm]

Pete,

Usually the first thing the folks at support will ask you to do is to 
run the TX Gain Calibration, so yes, that is the first thing you should try.

73,
Don W3FPR

On 2/5/2015 8:05 AM, Pete Smith N4ZR wrote:
> My K3/100 #4275 has suddenly stopped making 100 watts, and is now 
> making 10-20 on 160-20 meters, and 45-50 on 17-10 meters , even though 
> the power control says it should be making 99 watts.  On the way to 
> its current state, it cycled once through reduced power and back to 
> full power after a band change, so I suspect something was in the 
> process of failing.  Any ideas where to start troubleshooting, or is 
> this something that warrants a trip back to the mother ship?
>
> Addendum:  In further testing, with power turned below 10 watts to 
> disable the KPA3, I'm now seeing less than 1 watt on 160, 8 on 80, 8 
> on 40 and 11-13 on 20-10.  Turning the power back up to 100 watts, I 
> now have 20 watts on 160, 35 on 80, 25 on 40, 50 on 20, 85 on 15 and 
> 100 on 10m.
>
> Should I first try recalibrating the TX gain?