[Elecraft] K2 NB Question

[Barnett, Richard H]

Hi,
Newbie question:  I just finished my K2 and am slowly getting the options done and installed.  My QTH has about S6 or so of power line pulse noise (especially noticeable on 80M) so I got the noise blanker.  It is done and installed.

Based on previous radios I expected turning it on to make some  noticeable difference in the received audio.  I can tell absolutely do difference at any setting (lo or hi th, NB1 or NB2 or off).  There also is no difference in the noise on 80M.  I can currently only discern about 2 SSB signals on 80 - seems like way too few, but who knows?

 I have checked the parts, the voltages (which are switching as designated on the schematic) and if I set to lo-th, I do see pulses applied to the base of the gate transistor. But no noticeable difference in the sound.

Any thoughts or experience will be appreciated. 

73,
Dick, n9np