[Elecraft] K3S spurius ?

[Frederick Dwight]

Whenever I see something suspicious on my spectrum analyzer or receiver, my first step is to make sure the preamp is turned OFF and/or put in some additional attenuation.  160 meter signals and BCB are often very strong (too strong). Putting in 10 db of attenuation should cause much more than 10dB of reduced spurious if it is simple overload situation.  This is an easy thing to try, but may not help you. Normally a preamp is not indicated for 160 meters, unless you have a very small RX antenna with high loss compared to your typical transmit antenna.
                   Rick  KL7CW
                 

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