[aprssig] Hybrids & HF-in-motion

[Robert Bruninga]

How about this!  Wrap a wire loop around an overpass and hang some dipoles
along the side an just listen to all the cars going by.  write down the
noisey ones. It wount be as good, but will bea fast sample...

bob

On Sun, Feb 24, 2019 at 3:18 AM Greg D <ko6th.greg at gmail.com> wrote:

> 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.
>
> 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.
>
> Greg
>
>
>
> Robert Bruninga wrote:
>
> We really do need to get a handle on this.
>
> 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!
>
> Bob
>
> On Sat, Feb 23, 2019 at 2:42 PM Ev Tupis via aprssig <
> aprssig at lists.tapr.org> wrote:
>
>> 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.
>>
>> On Friday, February 22, 2019, 10:19:21 AM EST, Ev Tupis via aprssig <
>> aprssig at lists.tapr.org> wrote:
>>
>>
>> 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.
>>
>> Is there a recommendation (from personal experience) in regard to a
>> hybrid car that presents minimal QRM to HF operation while in-motion?
>>
>> Ev, W2EV
>>
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