[Elecraft] KAT2 Bridge null adjustment

[Don Wilhelm]

Ed,

Not enough information, so I am forced to make assumptions.
Are you using the RF probe to measure the RF voltage across the dummy 
load?  If so, 6 volts yields 0.72 watts as you stated, but if you have 
the Elecraft DL1 and measure 6 volts, the power is 1.49 watts.

Adjust R1 to agree with the external power reading.

If you continue to see extreme fluctuation in the power displayed by the 
K2, you may want to change the value of R98 on the bottom of the RF 
board.  See http://www.elecraft.com/Apps/Power_Control_Mod.html for the 
"rest of the story".

73,
Don W3FPR

On 8/13/2011 9:30 PM, EMD wrote:
> Don,
>
> When I use the DMM and measure the Voltage across I am only getting 6.0
> volts.  When I plug that into P=V*V/R I get .72volts.  I have also noticed
> that when I push TUNE I sometime see a fluctuating power indication and
> other times I see 2.4f 0.0r.  So what should I be looking at to adjust R1.
> Sorry to be so dense but this has me confused.  Also when I select TUNE the
> S meter fluctuates with the power display.
>
> 73,
> Ed ke7hga
>
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