[Elecraft] K3S Noise reduction Test

[Fred Jensen]

My experience with noise cancellation, by no means exhaustive or even 
quantitative, is that it is surprisingly effective, almost to the point 
of "magic", provided the noise source is a single point. It was 
essentially ineffective if there were multiple sources, or the source 
was extended in space[e.g. a radiating power line].

Perhaps the best signal-to-noise-ratio-improver I've ever found I 
learned as a teen working at a coastal marine station many years ago. 
The Holy Frequency could be extraordinarily noisy at night... the OT had 
me lay my cans on the deskand turn up the gain a little.  Ioften use it 
todayand it beats a noise limiter [I don't think they exist anymore], 
noise blanker[good for impulse noise], DSP, and cancellation.

I don't really know how it works, I suspect it has something to do with 
the broadband noise being more directive than the CW signalbecause if 
I'm over the headphones, it's less effective than if they're a bit off 
to the side.  I've never tried it with SSB, might do that in a free 
moment.  But, it's pretty cheap. [:-)

I've never gotten much use out of my K3's NR/NB but to be fair, I also 
haven't tried it very much.

73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn

On 6/20/2017 9:04 PM, Dave Cole wrote:
> Don,
> Thanks for the info, but as John said, I was suggesting a noise 
> canceling setup...  I was not clear enough, my error.
>
> 73s and thanks,
> Dave
> NK7Z
> http://www.nk7z.net