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It would certainly be an interesting project, but a static "put it
the Device Under Test on the test stand and aim an antenna at it"
wouldn't give an accurate picture of a car's behavior. Just as an
ICE's spark-gap transmitters, as well as alternators and the various
other electronic systems change their characteristics with RPM and
engine / accessory load, so do EVs, and with an added dimension when
they go into regen. You can't measure this stuff with a parking lot
test. <br>
<br>
More accurate, I think, would be to put the antenna and test
equipment in/on the car, and drive it on a prescribed course,
including acceleration and deceleration events. This could be done
on an actual track or a dynamometer.<br>
<br>
Greg<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Robert Bruninga wrote:<br>
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<blockquote type="cite"
cite="mid:CALdCfNLNX3OF+uNcVvgY2hSDj7yUznoDmAuCuSk3eZNp5so0_A@mail.gmail.com">
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<div>We really do need to get a handle on this.<br>
<br>
</div>
Set up a standardized test coil in the Parking lot of ARRL
and have every visitor park on it for a test. Tehn publish
the stats. Good project!<br>
<br>
</div>
Bob<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Feb 23, 2019 at 2:42
PM Ev Tupis via aprssig <<a
href="mailto:aprssig@lists.tapr.org"
moz-do-not-send="true">aprssig@lists.tapr.org</a>>
wrote:<br>
</div>
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0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
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<div
class="gmail-m_-5054369157429144021ydp654a5fe9yahoo-style-wrap"
style="font-family:courier
new,courier,monaco,monospace,sans-serif;font-size:16px">
<div>I guess that I can assume that QRM is as prevalent
as it always has been. I was hoping that the state of
the art would have progressed by now...but with an FCC
waiver to Part 15 applied there is little incentive.<br>
</div>
<div><br>
</div>
</div>
<div
id="gmail-m_-5054369157429144021ydp751f7eafyahoo_quoted_1060200602"
class="gmail-m_-5054369157429144021ydp751f7eafyahoo_quoted">
<div style="font-family:"Helvetica
Neue",Helvetica,Arial,sans-serif;font-size:13px;color:rgb(38,40,42)">
<div> On Friday, February 22, 2019, 10:19:21 AM EST,
Ev Tupis via aprssig <<a
href="mailto:aprssig@lists.tapr.org"
target="_blank" moz-do-not-send="true">aprssig@lists.tapr.org</a>>
wrote: </div>
<div><br>
</div>
<div><br>
</div>
<div>
<div
id="gmail-m_-5054369157429144021ydp751f7eafyiv2526290539">
<div>
<div>A number of years have passed since I asked
this, and I find myself in the market for
another car, so I'll ask again.</div>
<div><br>
</div>
<div>Is there a recommendation (from personal
experience) in regard to a hybrid car that
presents minimal QRM to HF operation while
in-motion?</div>
<div><br>
</div>
<div>Ev, W2EV</div>
<div><br>
</div>
</div>
</div>
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