[RFI] Tesla Wall RFI

[Tom Thompson]

You are correct, Dave. I did the math in the wrong direction. However, I have since made some measurements of my loop compared to a dipole, and with that correction the signal was S9+ 7 dB.

> On Apr 28, 2026, at 9:19 PM, Steve Dyer W1SRD via RFI <rfi at contesting.com> wrote:
> 
> The Power Wall and car are different animals.
> 
>> On 4/27/2026 2:37 PM, Jim Brown via RFI wrote:
>>> On 4/27/2026 1:14 PM, David Eckhardt via RFI wrote:
>>> There have been a number of reports of the Tesla chargers being quite a
>>> source of RFI on other sites as well as this one.
>> 
>> When I bought my Model 3 six years ago, I probed around with my Kenwood TH-F6A talkie it while charging from a 120V 15A outlet and did not detect any noise. I subsequently added a 30A 240V outlet, and now charge from that. I should repeat the probe with that higher voltage and current.
>> 
>> About 4 years ago, I found a couple of youtube videos from a ham in W5 who detailed installation of both VHF and HF rigs in his Model 3. He reported hearing moderate noise only when regenerative braking. Regenerative braking is a significant element of the mileage efficiency of all forms of EVs, beginning with those like the Prius, that also run on petrol.
>> 
>> 73, Jim K9YC
>> 
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