Hi Mario, S56A wrote: >This alleviates the needs for expensive sharp front end filters. Speaking of cost, for >12 dB less $$$$$, you can buy an Elecraft K2, get identical IMD and ~20 dB better BDR at 1 kHz spacings. But the K2 is not the "astonishing unparalleled ultimate" so you probably wouldn't be interested. ;-) 73, Bill W4ZV