John I have Yaesu FTDX-5000 it has a variable noise blanker quite effective.
Also has dsp noise reduction also very effective.
I also use external BHI noise reduction.
Very few types of noise get past all above.
Hope this helps.
Paul
W3PLP
Sent from my iPad Air 2
> On Oct 22, 2017, at 10:27 PM, John Geiger <af5cc2@gmail.com> wrote:
>
> I was making a rather serious (given my small antennas) effort today in the
> Illinois QSO Party and had to deal with this intermittent noise I have here
> for pretty much the entire contest. It is a raspy, hash type noise that
> will be on for 2 or 3 seconds, then will end, but come back every 20 to 30
> seconds. I have figured out it is not in my house, and doesn't seem to be
> power line noise. At one time I thought I had localized it to a house
> about 4 houses to the west of me, but the house is now unoccupied, but the
> noise is still there.
>
> Anyways, I was using the Kenwood TS950SD which I just picked up, and it is
> a great rig with lots of receiver tools. The noise blanker pretty much
> knocked out the noise, but it also produced plenty of IMD products when the
> band got busy and put a raspy sound on many of the signals, so I was having
> to turn the NB off and on trying to make the signals as best as I could
> with this noise. Even engaged the attenuator a few times on 40m which
> helped a little, but also weakened signals.
>
> I have had a slight windfall recently and can afford to get a newer, better
> rig if I want. Are there any recent Yaesus that have noise blankers that
> take out many different types of noise, but don't mess with the receive
> signals and receiver dynamic range? I wonder if the DSP based noise
> blankers are better? An older rig would be ok also if it would meet those
> criteria.
>
> 73 John AF5CC
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