I built my K2 some months back with the KNB2 option. The noise blanker has never been effective against any type of noise. The MCU recognizes the blanker, it draws the proper amount of current, but just doesn't seem to do anything. Before drinking the Kool-Aid (TM) I was pretty much a Kenwood man and was used to ineffective noise blankers so I ended up blowing it off. I recently built a K1, and the NB in it works FB. This got me thinking, and besides Elecraft would never release a NB that was useless--it violates the Tao of Elecraft. Yesterday I built another KNB2 (any excuse) and installed it in my K2. Same result! I checked all the solder joints, component values, RF board mods. It makes no difference whether it is NB1, NB2, HI or LO, the preamp is on or off--nothing. No change in S-meter reading, no change in audio. Any ideas, oh mighty brains?
Thanks, Eric WD6DB(lost in noise)
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