Make sure your cables are well seated. I believe I got that symptom one time when one cable was not fully plugged in.

73, Phil W7OX

On 2/4/15 3:11 PM, David Anderson wrote:
I notice I have large spikes every 12kHz at about -115 dBm whether connected to 
the KX3 or not.
Thought it may be by switching PSU I was testing with, but tried a silent 
linear PSU with the same result. Is this normal or have I a problem with the PS 
board in the PX3?

73

David Anderson GM4JJJ

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