I run my K3-S with 10w of drive power and usually get 200W out of the KPA500…. 
I have not hooked my KX3 up … but assuming you have 14V - I see no reason why 
this would not behave the same.

Regards
        Tim
                A45WG


> On 8 Feb 2016, at 00:47, James Bennett <w6...@me.com> wrote:
> 
> Jack,
> 
> I’ve got my KX3 and K3 cabled so that either can drive my KPA500 and KAT500 
> via a switch, per the diagram in Fred Cady’s book. When I use the KX3 to 
> drive the amp, I can usually get 240 watts out, max. However, I don’t 
> necessarily like to run the KX3 at full throttle (or my car!) so I back down 
> the RF out on the KX3 and let the amp cruise along at about 210 watts out.
> 
> Jim / W6JHB
> 
> 
>> On   Sunday, Feb 7, 2016, at  Sunday, 8:03 AM, w4grj <w4...@satterfield.org> 
>> wrote:
>> 
>> Can anyone advise power out of KPA500 using the KX3 as exciter?
>> Tnx,
>> Jack
>> W4GRJ
>> 
>> 
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