[RFI] Whole Home Generator

[Dave (NK7Z)]

Many thanks to all that assisted...  I will post the results...  I 
ordered today a 13 KW whole home Generator from Cummins.  It will be 
delivered tomorrow.  The transfer switch is 16 to 20 weeks out...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 2/5/22 12:13, Jim Brown wrote:
> On 2/5/2022 11:18 AM, Christopher Wawak wrote:
>> The single point entry for antennas at my house is right behind the
>> generator. 
> 
> If everything in your home and station is properly grounded and bonded, 
> and your feedlines are coax, what matters is the proximity of a noise 
> source to ANTENNAS, not their feedlines.
> 
> I did not notice any major RFI when it was running, or when
>> it's idle. My major concern was the battery charger.  So far I have
>> not noticed any more noise than usual, but I am not in a radio quiet
>> zone or anything. 
> 
> That's a BIGGIE in terms of assessing whether a new device is quiet. 
> Most of us who live in the developed world are surrounded by noise 
> sources -- almost everything that plugs into AC has a switch-mode power 
> supply that generates noise and conducts it to the power line, which 
> radiates it. If we've already got S7 noise, we're unlikely to notice a 
> new contributor.
> 
> I live in the mountains, with neighbors 400-600 ft from my antennas. In 
> one direction, my 7-el 6M LFA sees an S1 noise level; when pointed to 
> neighbors in three different directions, it gets up to S5. I see similar 
> differences on 160-40 listening on my Beverages.
> 
>> I do tune using an SDR on a large screen where I can
>> see the whole band at once, and noise (especially something close like
>> that) would for sure show up.
> 
> An SDR with a waterfall is a great tool for seeing and identifying noise.
> 
> http://k9yc.com/KillingReceiveNoise.pdf
> https://www.nk7z.net/sdr-rfi-survey-p1/
> https://www.nk7z.net/rfi-site-survey-part-ii-interpretation/
> 
> 73, Jim K9YC
> 
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