[Elecraft] RFI issues

Tue Feb 18 22:55:45 EST 2020

We bought a new Keurig coffee maker which does a pot or also the pods. It puts a huge noise out to the ham frequencies. Have to turn it off to get on 80M

Chuck Jack Hawley 
KE9UW

Sent from my iPhone, cjack 

> On Feb 18, 2020, at 5:51 PM, Bill Lederer <w8lvn.9 at gmail.com> wrote:
> 
> House we just moved into, we did new under-the-counter lighting.  Once I
> got the ham shack started, I saw s9 noise on 160 and 80. Turn them off, and
> it becomes quiet.
> 
> Other led panel lights produce no noise whatsoever.
> 
> But now that that is identified, I will be tracking down some other noise,
> likely in the neighborhood.
> 
> w8lvn
> 
>> On Tue, Feb 18, 2020 at 5:29 PM Fred Nassar <fnassar62 at gmail.com> wrote:
>> 
>> Had a similar issue moving to a new QTH. It turned out to be a bad
>> transformer in the neighborhood. You could call in an RFI complaint once
>> you rule out your own QTH and asked them to sniff around.
>> 
>> You can also sniff around with a 2 or 6 meter SSB rig if you have one.
>> 
>> Fred
>> KE4Q
>> 
>>> On Tue, Feb 18, 2020, 5:47 PM Michael Walker <va3mw at portcredit.net> wrote:
>>> 
>>> HI Andreas
>>> 
>>> Sorry to hear about your noise.
>>> 
>>> I doubt your noise is related to digital TV as that is a long way away in
>>> the frequency world.  It is pretty common to assume that it is not on
>> your
>>> own property.  I saw one guy who said the same thing and then found out a
>>> year later it was his new dryer that was noisy even when they were not
>>> using it.
>>> 
>>> I would not be surprised that most of your HF noise is within your own
>>> property unless you did some significant research by  holding an AM radio
>>> near each and every power cube or charger for phones, etc.  There are not
>>> too many that are quiet.
>>> 
>>> I use my KX2 to find most of my HF noise issues and I must have tossed
>> out
>>> 15 bad chargers.  The ones I could not just toss away, I had to add Mix
>> 31
>>> chokes to.
>>> 
>>> When you moved into your new house did you replace all the light bulbs
>> with
>>> LED bulbs?  They can be noisy.
>>> 
>>> If you haven't taken the time to do an indepth study on your own house,
>> you
>>> should.  You might be surprised.  I would plan an all day exercise when
>>> everyone is out of the house.
>>> 
>>> Mike va3mw
>>> 
>>> 
>>>> On Tue, Feb 18, 2020 at 2:25 PM Dave Cole <dave at nk7z.net> wrote:
>>> 
>>>> Hi,
>>>> 
>>>> I might suspect something else...
>>>> 
>>>> Have you done a power off test of your home yet?
>>>> 
>>>> 73, and thanks,
>>>> Dave (NK7Z)
>>>> https://www.nk7z.net
>>>> ARRL Volunteer Examiner
>>>> ARRL Technical Specialist
>>>> ARRL Asst. Director, NW Division, Technical Resources
>>>> 
>>>> On 2/18/20 8:29 AM, Andreas Wachter via Elecraft wrote:
>>>>> I live about 1.6 miles from some tall antenna towers broadcasting
>>>> digital TV (KBCB) at 208 kW ERP on channel 19 (500 - 506 MHz) and on FM
>>>> (KWPZ-FM) at 63 kW ERP on 106.5MHz - according to FCC info on KBCB and
>>>> KWPZ-FM. Ever since I moved to this QTH a few months ago, I am unable
>> to
>>>> use my K3: solid S9+ noise on all bands using a makeshift dipole strung
>>> up
>>>> on some trees outside my house. I’ve tried to locate the source of the
>>> RFI
>>>> within my home but so far have been unable to locate any RFI emanating
>>> from
>>>> within my home. Could it be that the TV/FM stations antenna towers,
>> which
>>>> are within direct line of sight from my house, might be responsible for
>>> the
>>>> RFI?
>>>>> 
>>>>> 73, Andreas
>>>>> 
>>>>> K6AKW
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> 
> 
> 
> -- 
> --w8lvn--
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