[Elecraft] Output power on K2 not stabel

[Ron D'Eau Claire]

50 to 100 watts?? 

I've seen the R98 tweak help with power cycling over a range of a few watts,
but not a 2:1 range from 50 to 100 watts! 

That's not normal for ANY K2 that I've ever heard of but, Don, you've worked
with far more K2's than I. Have you seen this large a range caused by R98
elsewhere?

The app note describes a variation like I've seen, less than 0.5 dB or, say,
perhaps as  much as 0.5 watts at the 5 watt level. 

Ron AC7AC

-----Original Message-----
Dick,

Check out this application note at the Elecraft website - 
http://www.elecraft.com/Apps/Power_Control_Mod.html

Each K2 is a bit different in the overall transmit gain, so for most 
stable operation, the value of R98 must be determined experimentally.  
Be aware that increasing R98 too much will result in a power output drop 
on 10 meters (the band with the lowest transmit gain), so some 
compromise must be made - you select how much power reduction on 10 
meters is tolerable for you.

73,
Don W3FPR

Dick Grolleman wrote:
> Hi All
>
> I'm using my K2/100 to drive my Amp with 50 watts. But the output 
> power is not stabel. When set to 50 watt the power goes from 50 to 100 and
back, wich causes to much drive for my Amp. Other then that the K2 works
fine with 100watts, barefood.
> Any one knows this problem? And more important, how do is solve it.
> My K2 is serial nr 4072. It's build in sprng 2004. Rev B  KPA100
>
> Have the K3 on order, have to wait a few more months
>
>   
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