I have used the same supply with my K2 at 10 watts with no issues.

Bob N7XY

On Sep 18, 2012, at 10:26 PM, Bill Tubbs <cgpi...@yahoo.com> wrote:

> Yeah, I spoke before doing the math. As Don said, the math is simple. P=EI. 
> Or, I=P/E. So, I don't know what the KX3 input is but if we say it's 20 
> watts, 20/12=1.67 amps. Clearly the MFJ should handle the KX3 at full power, 
> at least for non-data modes. Thanks for shaking my cobwebs loose!
> 
> Bill
> WK6A
> 
> Sent from my iPhone
> 
> On Sep 18, 2012, at 5:06 PM, "Phil&Debbie" <dpsa...@tx.rr.com> wrote:
> 
>> “After sending my note about using the little MFJ power supply at 2.89 amps, 
>> I realized that it works fine on my FT-817D at 5 watts but would obviously 
>> be taxed at the full 12 watts of the KX3. So fuggetabowdit.”
>> 
>> The MFJ supply will power the KX3 just fine at 10 watts.  The KX3 draws 
>> about 2-amps at 10 watts.  I used the little MFJ supply (which is rated at 
>> 2.8 amps) to power my IC-703 which also put out 10 watts at about 2-amps.
>> 
>> Phil – AD5X 
>> 
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