A modification I have performed on my IC-756pro noise blanker minimizes this
problem. It also helps with SSB activated noise blanker splatter. It is a
receiver modification. I have by-passed the filter(fl132) in front of the
noise blanker with a short piece of wire. The filter is left in place and
used as a terminal strip. This is a 15kc filter at 455kc. There is another
15kc filter in the 64.455mc IF that I leave in place. Now that we have an
adequate bandwidth for the noise to enter through, the NB gain control can
be reduced to a lower level. This mini-pot is located near the filter.
This makes clicks and strong SSB a less important factor to the NB. I now
can use the NB on 75m SSB in the presence of strong signals. The NB is much
more effective even with the reduced level adjustment.
Don Andersen
W7DD
|