Some good info on Noise Cancellers.
From: firstname.lastname@example.org On Behalf Of Bill Hohnstein KØHA
If anyone is interested reading about the operation of a MFJ-1026
"Deluxe Noise Canceling Signal Enhancer" I've written a fairly detailed
explanation of it on my web site:
Included is a .mp3 recording showing an example of its operation.
The mentioned site deals specifically with MFJ-1026 use on the airport NDB
beacon frequencies centered around 300 kHz. I have two more which I
primarily use on 160 & 80 meters, but they also work up to the 10M band.
And the antenna separation required on ham frequencies is less than that
mentioned on my NDB page (25 - 30 feet may be enough on 80M).
I generally use them for signal enhancement or rejection. They can also
be used for noise elimination >>IF<< the noise is coming from a point
source. If noise is emanating from a power line or other non-point source,
they won't do much good. The quality of the antennas used (and their
separation and directivity) will determine the quality of the results.
73, Bill K0HA
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