[RFI] AM Radio Dropped From Electric Vehicles Due To RFI

[Hare, Ed, W1RFI]

I just rented a 4Runner and the AM reception is fine. I could hear noise as I drove past some other vehicles, though.  I got into the fast lane and moved to pass quite a few cars, all in the name of this reasearch, of course.

Ed
________________________________
From: RFI <rfi-bounces+w1rfi=arrl.org at contesting.com> on behalf of Michael Tope <W4EF at dellroy.com>
Sent: Saturday, July 30, 2022 7:25 PM
To: rfi at contesting.com <rfi at contesting.com>
Subject: Re: [RFI] AM Radio Dropped From Electric Vehicles Due To RFI

I bought a Toyota RAV4 PHEV recently. Today I tried out the AM radio in
electric-only mode while driving on the I-210 Freeway through Pasadena,
Ca. The reception was surprising good. I could hear some hash in the
background, but I had no problem receiving all the various AM stations
around town that I would expect to receive with a quality AM receiver in
an conventional ICE equipped vehicle. I still need to try it out in
hybrid-mode or charging-mode with the ICE engine running to see what if
any ignition noise is present, but in electric-vehicle mode, the AM
radio works surprisingly well.

73, Mike W4EF.................

On 7/23/2022 3:32 PM, Tony wrote:
> All:
>
> It appears that some electric vehicle manufactures are eliminating AM
> radio due RFI generated by EV's. The article below outlines the reasons.
>
> It reads in part:
>
> /"electromagnetic frequencies generated by EV motors occupy the same
> wavelength as AM radio signals. The competing signals clash,
> effectively cancelling each other out. As EV motors grow more
> powerful, AM static tends to increase./
>
> I suspect the harmonics from that interference could cause havoc on
> the HF spectrum -- something to think about for those contemplating HF
> mobile in an EV.
>
> Tony -K2MO
>
> Article Link:
>
> http://www.southgatearc.org/news/2022/july/interference-causes-ev-makers-to-drop-am-radio.htm?utm_source=feedburner&utm_medium=email#.YtxwkXbMIuV
>
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