Petr:
I have used and reported on the MFJ-1026 [see www.k0to.us for information].
Last year I installed the NCC-1 with dual active verticals and was testing
that. I did not use it to null noise because the horrible noise I had been
fighting for the previous two years had been found and disposed of -- a
collaboration between the power company and me.
I will be installing the NCC-1 and active phased verticals again this year.
I also plan to set up the antenna feeds to the NCC-1 to null noise should
that prove to be of interest. The active phased verticals - NCC-a
combination seemed to work well last season and compared rather favorably
with a K9AY dual loop RX system that was also in place during the Winter
months.
My general impression is that the NCC-1 is much better at adjusting the
phasing between signals received from the input antennas than the MFJ-1026
was. The MFJ seemed to have much of its adjustment {for my location, noise
and sense antennas} confined to a very small portion of the adjustment pot
range. When I tried reversing things with the MFJ it did not seem to always
do what I expected it to do. The NCC-1 does not seem to have that problem --
again, someone else may have different problems and experiences.
I do not [yet] regret making the shift to the NCC-1.
I have no personal experience with the original ANC-4 or the Timewave
version of a noise cancelling unit.
73, Tod, K0TO
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