Hi Jim
May I ask you about your system for mixing rx antennas? How do you arrange
the double mixing? I have this in mind and I already have a 1026 and could
buy a NCC-1. I have a selection of HF aerials going up which I can use for
rx on 160, possibly even in diversity mode with the K3. We have neighbours
all around with various noise sources.
Re the hash from your K3: do you have that mod fitted that puts a sharp cut
off audio filter in the K3? I recall it was originally made for a weak
artifact >12kHz some experienced way back. You said "high freq to 1,200 Hz,"
did you really mean that?
Sorry for the thread drift.
73
David
G3UNA
I have the Timewave, the NCC-1, a MFJ-1026 noise canceller, beverages and
commercial mag loops, and my comments are:
1. I find the Timewave Noise reduction is of little value, the K3 NR is
superior
2. The Timewave has an EXCELLENT audio amplifier and completely removes
the "hash" from the K3 audio. I use Bose QC-15 earphones that reproduce
high frequencies very well.
3. The Timewave DSP filters have little ringing and are steep. I adjust
the low freq
cutoff to 300 Hz and the high freq to 1,200 Hz. This TOTALLY eliminates
the "hash"from the K3 audio.
4. If you have an rf noise issue, the Timewave will not help any more than
what the K3 does.
5. The MFJ does work as advertised, but it is difficult to adjust. When
adjusted, it does give great nulls.
6. The NCC-1 also works as advertised, and is far easier to adjust.
7. The "noise antenna" is VERY important to the performance of any noise
canceller.
8. Loops are great to null a single noise source. It is inferior to a
directive (gain) antenna.
I went totally overkill for my physical location in California, with two
PRO 1B loops and two phasers that can address two noise sources. I no
longer have the room for beverages, which were the best with a phaser for
160-40 meters for my physical location
Jim
W6AIM
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