[OKDXA] Radios and noise

[John Geiger]

Hi Rick,

The line noise has been fixed.  I am wondering if this other noise I am
hearing is crud from other electronics in the neighbors houses, and if a
better receiver would just be more immune to this to start with, and maybe
also handle it better.

73 John AF5CC

On Mon, Jan 23, 2017 at 8:13 PM, Rick <K9KK at atlinkwifi.com> wrote:

> John
> Even with an expensive radio, the noise blanker
> can only do so much.  My experience is that
> "ONLY SO MUCH" is NOT/NEVER enough
> to do any good.
> Or, noise blankers are good on paper,
> but not very useful in practice..
> The noise source must be found and fixed.
> I had a horrible one for a year.  Recently.
> S9 and 10 over at times.
> I finally found it about 1/2 to 3/4 mile away.
> The power company came out and said, OH
> it is a broken lightning arrestor that is arcing.
> And proceeded to smash it so that it didn't arc anymore.
> Problem solved.
> I have a 3 element bean and receiver combo for noise
> tracking.  Your welcome to try it out.
> Let me know if your interested in trying it.
> Rick K9KK
> P.S.  Had a similar experience about 9 years ago.
> They came out and smashed that lightning arrestor also.
>
>
>
> 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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