[OKDXA] Radios and noise

[John Geiger]

I didn't find any noise source in my house today switching on and off
circuit breakers.

73 John AF5CC

On Wed, Jan 25, 2017 at 9:58 AM, Coy Day <n5ok at arrl.net> wrote:

> Also check out any fluorescent lights you might have.  I found that to be
> a problem here once.
>
> --
> Coy Day, N5OK
> 20685 SW 29
> Union City, OK 73090
> 405-483-5632
>
>
>
>
> John Geiger wrote:
> > Hi Bob,
> >
> > Thanks for the info.  I did listen today during the day on 40m and it was
> > still about the same.  Guess it is time to see if it is anything in my
> > house causing it. Will probably do that tomorrow morning.  I was able to
> > rule out the wireless router and desktop computer today, though, as a
> > source of noise.
> >
> > 73 John AF5CC
> >
> > On Mon, Jan 23, 2017 at 7:20 PM, Robert Redmon <k5sm.bob at gmail.com>
> wrote:
> >
> >> John, I live in a rather (rf) quiet place several miles from town and
> >> suffer from very little power line noise and my nearest neighbor is
> >> several
> >> hundred feet away. The noise you hear on 40 meters is not abnormal for
> >> times when the band is open. Currently on my dipole at 65' using either
> >> my
> >> K3 or my Flex 5k, the ambient noise on ssb (2.4khz filter) is S5-S6.
> >> During
> >> the day, it will fall to much lower levels.
> >>
> >> Bob
> >>
> >> On 1/23/2017 7:07 PM, John Geiger wrote:
> >>
> >>> I know if you buy a more expensive radio, you get a receiver that
> >>> (usually)
> >>> has better dynamic range and handles QRM conditions better, generating
> >>> less
> >>> IMD products and blocking when the band gets full of signals.  Does the
> >>> same hold true for QRN and electrical crud?  I know that some radios
> >>> have
> >>> more tools than others, like noise reduction, notch filters, stuff like
> >>> that.  Do more expensive receivers get less affected by RFI and other
> >>> junk,
> >>> and by atmospheric noise?
> >>>
> >>> Here is my situation:  I was having some bad powerline noise from a
> >>> pole
> >>> close to my house. The noise blanker in the radio I have took out the
> >>> buzz,
> >>> but I am seeing a S6 noise level on 40m SSB and on 20m SSB sometimes.
> >>> I
> >>> figured some of that came from the line noise, so I didn't think about
> >>> doing much until the line noise was fixed first.  Well the power
> >>> company
> >>> came and fixed it today. The buzzing is gone!  The noise level still is
> >>> there, though.  I am using a Yaesu FT100D which has a great noise
> >>> blanker,
> >>> and does have AF DSP, but it is a cheap, mobile type HF/VHF/UHF radio.
> >>> On
> >>> 40 meter SSB I see a S5 or S6 noise level when on SSB, and that is with
> >>> the
> >>> preamp off.  On CW it is much less because I put the 500hz CW filter in
> >>> line.  20 meters is sometimes the same, but sometimes on SSB the noise
> >>> is
> >>> much lower, which I think is probably from urban crud. I live in an
> >>> older
> >>> neighborhood where the houses are maybe 8 feet apart, if that much. I
> >>> am
> >>> sure many neighbors have switching power supplies in all sorts of
> >>> electronics.
> >>>
> >>> So, is this 40 meter noise level pretty typical for most people?  Would
> >>> a
> >>> more expensive radio like a Kenwood TS590 (which is supposed to have a
> >>> great receiver), Yaesu FTDX1200 or Icom 7200 be less affected by these
> >>> types of noises?  I can't afford much more than that right now,and
> >>> would
> >>> like something that is fairly small enough to still take mobile or
> >>> portable
> >>> from time to time.  I did try a yaesu FT891 which is a mobile sized
> >>> radio
> >>> and it was maybe very slightly better, but not really noticable.  A Ten
> >>> Tec
> >>> Eagle would also be small enough.
> >>>
> >>> Is this one of the compromises you have to live with when you get a
> >>> smaller
> >>> radio?
> >>>
> >>> 73 John AF5CC
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