[Elecraft] KXB-3080 after modification

[Leigh L. Klotz, Jr.]

I made the drive modification and power output is up, but may not back 
quite up to what it was before, at least in my recollection, hi hi.
The instructions didn't call for any realignment afterwards, and I 
didn't do any.

The power figures below were calculated from the DL1, a DMM, and 
ATU=CAL, with a 13.2v power supply.
80m and 75m were at band edges; others were in the CW portion.

m  W
80 2.7
75 2.3
40 2.9
30 3.7
20 2.8

The supply voltage measured internally sags a bit more on TX than I'd 
expect: 0.5v vs 0.1v measured externally, but if I compensate for that 
and get 13.2V on the internal meter during TX with a variable supply, I 
still get only 3.0W on 40m, not the 3.5 I was getting before.

On internal batteries, 9.2v RX / 8.1v TX I get respectable results:

m  W
80 1.0
75 0.9
40 1.0
30 1.5
20 1.1

I would like to get the 3.5-4W output I was used to on 40m, and am a 
little bit jealous of the reports of others.  I realize it's only 0.8db, 
it doesn't matter that much, and is likely due only to variation in 
components, and in fact if it had always been like this I probably 
wouldn't have given it a thought.  And if indeed there is a problem, it 
may be unrelated to the 80m option.   Yet it still nags at me. 

Leigh / WA5ZNU