[Elecraft] Spurious

[Ken Chandler]

Hi
I've just done some tests with my k3 sn 3759 and have been told I have  
a spurious signal 600Hz above my tx frequency. It was at first heard  
with my amp on but I switched out the amp and ran the k3 with 100w and  
my note was still there.
Signal level on the spurious was aprox 50db down.
My tests were on cw, and my tester was less than 1/2 mile away.
Any idea"s!!!

Ken..G0ORH

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