Today's Message Index:
----------------------
0. 09:00 AM - Reminder (Matt Dralle)
1. 11:06 AM - Automotive Electrical System Study (William Hunter)
2. 09:56 PM - SV-MAG-236 (William Hunter)
3. 11:08 PM - Re: SV-MAG-236 (Stuart Hutchison)
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Dear Listers,
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Matt Dralle
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Message 1
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| Subject: | Automotive Electrical System Study |
Hi All,
I finally got around to conducting the scientific study of the electrical
draw of my car electrical system when the ignition switch is off.
Here is the results of this scientific study:
1999 Saturn 3.46 MA
2002 Saturn 2.02 MA
2007 Yukon 3.42 MA
The 1999 Saturn was the one I had the new battery die on last week. The
battery was really dead (not mostly dead) after it sat at the airport for
about 5 weeks. AutoZone determined that the 8 month old (new) battery had a
bad cell and replaced it for FREE!!!
I ass-u-me that one cell going bad could reduce the capacity of the battery
to the point where the interior lights would not even show any kind of
life?!?!?
Anyhoo.THANKS AGAIN!!!
..
Cheers!!!
Bill Hunter
Message 2
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I may have to use a remote mounted SV-MAG-236 magnetometer for my Skyview
system because my trim motor is in the location where the AHRS is located
and this motor creates a small amount of magnetic interference. I placed a
compass in the location and the needle moved a little.it might still work
however I am thinking up my backup plan.
The ideal location for the remote mounted SV-MAG-236 magnetometer would be
under the rear seat of my Velocity (fiberglass) however that is where I want
to mount my ADS-B antenna.
So the question is.does an digital antenna (and or the coaxial cable running
to/from it) create magnetic interference and/or how close to a ADS-B antenna
can I locate the SV-MAG-236 magnetometer?
THANKS for your help!!!
..
Cheers!!!
Bill Hunter
Message 3
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G=99day Bill.
There=99s actually no such thing as a digital antenna
every signal (switched digital or analogue) is simply superimposed (i.e.
modulated) onto a carrier sine wave at the pre-defined frequency (in
this case 978MHz or 1090MHz depending on your ADS-B kit). It=99s
more of an art than an exact science and while properly grounded coax in
proximity may be just fine, having a radiating (transmitter) antenna
that close to the magnetometer is not good. Dynon does allow an AHRS to
be offset from the centreline (by extension the magnetometer too), so
perhaps you could install the magnetometer in the wing root?
Cheers, Stu
F1 Rocket VH-FLY
www.mykitlog.com/rockfly
> On 16 Nov 2016, at 16:50, William Hunter <billhuntersemail@gmail.com>
wrote:
>
> I may have to use a remote mounted SV-MAG-236 magnetometer for my
Skyview system because my trim motor is in the location where the AHRS
is located and this motor creates a small amount of magnetic
interference. I placed a compass in the location and the needle moved a
littleit might still work however I am thinking up my backup
plan.
>
> The ideal location for the remote mounted SV-MAG-236 magnetometer
would be under the rear seat of my Velocity (fiberglass) however that is
where I want to mount my ADS-B antenna.
>
> So the question isdoes an digital antenna (and or the coaxial
cable running to/from it) create magnetic interference and/or how close
to a ADS-B antenna can I locate the SV-MAG-236 magnetometer?
>
> THANKS for your help!!!
> ..
>
> Cheers!!!
>
> Bill Hunter
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