[OKDXA] Radios and noise

[Coy Day]

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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