[RFI] A Bizzare EMI Story

[Grant Saviers]

Shouldn't cars be required by the FCC to conform to Class A or B 
limits?  After all, they are a large collection of computers with some 
wheels attached.

Something ARRL ought to pursue.  It's not rocket science to solve this, 
only $ of manufacturing cost.

Grant KZ1W

On 11/7/2018 8:36 AM, Les Cockram wrote:
> Front page article in today’s WSJ concerning am radio rfi in EV vehicles.
> Find an easy cure and you will a rich person.
>
> Sent from LTC
>
>
>> On Nov 7, 2018, at 11:29, David Eckhardt <davearea51a at gmail.com> wrote:
>>
>> Electronic 'mosquitoes' (RFI producers) make wonderful objects for target
>> practice....
>>
>> Dave - WØLEV
>>
>>> On Wed, Nov 7, 2018 at 4:41 AM Mike NA6MB <na6mb.mike at gmail.com> wrote:
>>>
>>> I vote hammer !
>>>
>>> NA6MB
>>>
>>>
>>>
>>>> On 11/6/2018 7:30 PM, donovanf at starpower.net wrote:
>>>> From: "Sam Josuweit" <samjos at epix.net>
>>>> To: topband at contesting.com
>>>> Sent: Wednesday, November 7, 2018 2:15:35 AM
>>>> Subject: Topband: Bizzare EMI Story
>>>>
>>>> So after taking a few years off from radio, over the summer I decided to
>>>> rebuild my station and antennas and get back on the air. Was doing fine
>>>> until a few weeks ago, my noise level was S9 on 80 meters. Using a
>>> beverage
>>>> it was ok but on my TX antenna it was 120hz hash. I tried everything to
>>>> locate the source, unplugged computers, Directv, DSL modem, freezer you
>>> name
>>>> it, checked my entire ground system, it still was there. To make matters
>>>> worse after listening to it on AM I noticed I could hear the local NOAA
>>>> Weather radio station, which is on 162.55 MHZ FM! Now the local
>>> transmitter
>>>> for NOAA is on the next mountain over and line of site with my remote
>>> QTH,
>>>> but 162MHZ to 3.7MHZ?? This really had me stumped, and I was just about
>>> to
>>>> give up. I have an old farm house and don't have too many power outlets,
>>> but
>>>> I realized I missed checking the one in our bedroom, and there sits my
>>> NOAA
>>>> weather alert radio. Unplugged it and the hash was gone. Since these
>>> radios
>>>> monitor constantly for alerts, they must just mute the audio when not in
>>>> use. Apparently something in the radio power supply failed causing the
>>> power
>>>> noise, which was then getting modulated by the muted audio. This was
>>>> propagating thru my whole electrical system. I'm just glad I found it.
>>>> Debating if I should take a look at the weather radio or smash it with a
>>>> sledge hammer.
>>>>
>>>> Sam (N3XZ)
>>>>
>>>> _______________________________________________
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>>>> http://lists.contesting.com/mailman/listinfo/rfi
>>> --
>>> Thanks,
>>> Mike
>>> NA6MB
>>>
>>> _______________________________________________
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>>>
>>
>> -- 
>>
>> *Dave - WØLEV*
>> *Just Let Darwin Work*
>> *Just Think*
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