FW: [Elecraft] K2 Odd Power issues

[Dan Barker]

Evidently the wattmeter is not a problem. The KAT2's power meter seems fine
(eg, believable). I checked with a 200MHz bandwidth scope and the results
are shown below. I'll dig around the transformers a bit. What's the current
thinking on the 160 inefficiency?

Dan / WG4S / K2 #2456

K4ZM sez:
<snip>
Don't overlook the fact that most wattmeters have a roll off of accuracy
when you get ot the 24/28 MHz frequencies.  They tend to indicate a lower
than actual output.
</snip>

Freq KAT2 Amp O'scope Calc
 1.8  9.9 4.7  3.6    13.0
 3.5 13.9 3.0  4.1    16.8
 7.0 14.4 2.9  4.1    16.8
10.1 13.1 3.0  3.8    14.4
14.0 12.9 2.7  3.6    13.0
18.1 14.2 3.0  3.7    13.7
21.0 11.6 3.1  3.2    10.2
24.9  9.3 2.5  2.8     7.8
28.0  5.8 2.3  2.4     5.8

O'scope figures are p-p/2 at 10X. Calc is (Scope * 7.07)^2 / 50