[CQ-Contest] DSP units with great noise reduction

[Jeff Kinzli N6GQ]

Not a super modern radio, but I was very impressed with the Elecraft K2 DSP
daughterboard. It had an uncanny ability to pull very weak signals out of
noise. It was also quite good at removing man-made and atmospheric noise.

I have yet to find a radio and/or NR/DSP circuit that is as good as the
K2+DSP, having tried most of the top end radios. They do the job, but IMHO
not quite as good :)

73 de N6GQ

On Fri, Oct 23, 2020 at 4:50 PM John Geiger <af5cc2 at gmail.com> wrote:

> Thanks for the feedback so far. Those videos are rather impressive.  Other
> than the FTDX3000, are there other radios out there that have very good
> noise reduction circuits good at reducing the fatigue from listening to the
> RFI crud out there?
>
> 73 John AF5CC
>
> On Thu, Oct 22, 2020 at 8:36 AM Martin, LU5DX <lu5dx at lucg.com.ar> wrote:
>
> > Hello John,
> >
> > In my case I use several things.
> > I have two noise cancelling units:
> > QRM Eliminator by SP8RSM
> > JPS ANC-4
> > These are no DSP but rather X-Phase type.
> > I owned a Timewave DSP599zx which worked okay in many aspects, like with
> > no specific EMI sources.
> >
> > I sold it when I bought the FTDX3000D.
> > This rig is great. I have tested it during SSB and CW contests. On CW
> with
> > the optional 300Hz roofing filter it simply outperforms other rigs I have
> > used like, IC7851, K3S, IC7700, IC7600.
> > The noise reduction capabilities are pretty good.
> >
> > I think you may have to experiment fighting the QRM based on what's
> > present at your location though.
> > Eventually you may want to explore with software using Linrad for example
> > as a last step in your noise-fighting artifacts chain.
> >
> > Some videos on YouTube that may give you an overview:
> >
> > QRM Eliminator:
> > https://youtu.be/0KJai82eP2g
> > https://youtu.be/efyJRS3jbOI
> >
> > Linrad
> > https://youtu.be/rWm38BW2-TI
> >
> >
> > I would really suggest you consider the DX Engineering NCC2
> >
> > Vy 73,
> >
> > Martín, LU5DX
> >
> > El mié., 21 oct. 2020 10:19 p. m., John Geiger <af5cc2 at gmail.com>
> > escribió:
> >
> >>  I made a rather serious effort in the Illinois QSO party today since I
> >> used to live in IL and know a few of the operators in the contest, plus
> it
> >> is only an 8 hour effort-but I wish they would move it away from
> football
> >> season!  Conditions weren't the best, but I was really suffering from
> >> noise
> >> on 40 meters-not one specific noise source, just the crud you get from
> >> living in an urban neighborhood with lots of consumer electronics and
> >> their
> >> crummy switching power supplies and other noise makers.  I am sure I am
> >> not
> >> the only ham with this issue.  The noise reduction circuit in my current
> >> rig didn't do the greatest on handling this noise.
> >>
> >> One idea that came to me, that would be cheaper than a new rig (but less
> >> fun) would be an outboard DSP unit.  Does anyone have any
> recommendations
> >> on DSP units that have good noise reduction circuits?  I have seen some
> >> reviews on the Clearspeech and GAP speaker units that said that after
> you
> >> unkey after transmit you are hit with a burst of noise until the unit
> >> readapts itself to the receiver noise. I don't want something with that
> >> issue.
> >>
> >> Recommendations?  Also, what radios are really good at dealing with this
> >> type of noise.  I have seen the FTDX3000 and K3 mentioned as having
> great
> >> noise reduction circuits.
> >>
> >> 73 John AF5CC
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> >>
> >
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