I've been following this discussion with interest. I've used the NCC-1 with my K3 for several years now. I use one of the DX Engineering 102" active antennas for noise pickup to cancel noise on my Tx vertical antennas.
My best success with noise cancellation has been on the higher bands 20-10 meters, but it also helps even on 160.
Recently, I've added pairs of matched bandpass filters for additional noise attenuation. DXE offers HP, LP, and BP filters for enhancement of the NCC-1. Anyone with the NCC-1 should check these filters out. They are supposed to be used in matched pairs for the A & B inputs. Two sets of matched pairs can be selected using the L/H positions of the "Band" switch on the front panel.
73,Chuck Guenther NI0CKX1, K2-10, K3
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