[Elecraft] K3 Intermod with IF NB

[g0afh]

  Hello,

Primarily I use my K3 to drive transverters for the higher bands. I 
transvert to 2m from 20m using the transverter interface on the k3.

Conditions on 2m have been enhanced in recent days so there a few big 
signals on the band. Last night I needed to use the NB to deal with some 
local power line noise. With the NB on there is far more intermod than I 
would have expected.

Locally I have a beacon on 144.43 (s9+40). Station A on 144.32 (110KHz 
from the beacon) could also be heard on 144.210. Station B on 144.270 
(160KHz from the beacon) could be heard on 144.110. Both stations were 
over s9. In both cases the spurious signals were around s4-5, distorted, 
but easily identifiable.

Switching off the IF NB makes the spurious signals disappear.

Perhaps I shouldn't be surprised, using the NB is never a good idea with 
strong signals around.

73
Ian.