[Elecraft] K3 tx power troubles

[Martin Sole]

My aging K3, S/N 298, is once again proving a little troublesome. Into a 
nice solid 50 ohm dummy load with a strong 14 volt supply and short 
thick cables never known to be an issue I see a maximum of about 10 
watts out when set to 110 watts on the front panel. Starting at 0w it 
increases in line with the setting until about 3.5 watts. The LPA stops 
there and then when the KPA3 comes in it goes up to about 10 watts but 
beyond that no further increase.

I presume this is a either a drive or and LPA issue but I suspect the 
actual cause might be well known here. What are the chances?


Regards
Martin, HS0ZED