Today's Message Index:
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1. 07:48 AM - Audio panel move (RV7ASask)
2. 08:13 AM - Re: Audio panel move (Charlie England)
3. 01:41 PM - Re: Audio panel move (Robert L. Nuckolls, III)
4. 04:56 PM - Z 16 Charging question (William Daniell)
5. 05:32 PM - Re: Audio panel move (RV7ASask)
Message 1
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| Subject: | Audio panel move |
I am in the process of upgrading my panel and would like to move the Garmin GMA
240 audio panel across the instrument panel. It would be a move of about two
feet. Can I make two extension wire harnesses and just connect across? I would
use shielded wires where they are already in use but I am concerned about the
integrity of the extensions? Is there a feedback/noise potential doing this?
Is there a better way?
Thanks
David
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=503547#503547
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| Subject: | Re: Audio panel move |
On 10/17/2021 9:47 AM, RV7ASask wrote:
>
> I am in the process of upgrading my panel and would like to move the Garmin GMA
240 audio panel across the instrument panel. It would be a move of about two
feet. Can I make two extension wire harnesses and just connect across? I would
use shielded wires where they are already in use but I am concerned about the
integrity of the extensions? Is there a feedback/noise potential doing this?
Is there a better way?
> Thanks
> David
SubD connectors? If it were me, I'd certainly make up a male-female
extension. All the impedances in an audio panel are quite low,
minimizing noise pickup risk. I'd consider the biggest risk the
fabricator him/her-self. If using the quality gold plated machined pins,
I wouldn't think twice about making up extensions.
Charlie
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Message 3
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| Subject: | Re: Audio panel move |
>SubD connectors? If it were me, I'd certainly make up a male-female
>extension. All the impedances in an audio panel are quite low,
>minimizing noise pickup risk. I'd consider the biggest risk the
>fabricator him/her-self. If using the quality gold plated machined
>pins, I wouldn't think twice about making up extensions.
>
>Charlie
Agreed! What connectors are you needing Dave?
I may have some in the project residuals.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 4
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| Subject: | Z 16 Charging question |
I have a Rotax 912 with a Z16 and Dynon Skyview
The ammeter sometimes ( defined as once every 25 flights) goes off the
chart to 60a. I get the red X over the instrument. Then it comes back and
goes down to normal and sits there at whatever loads I have on the system.
I have always assumed that this was a Dynon bug.
My Dynon has a shunt installed between the generator and the bus
which measures the entire load normally rock steady at 7A or 8A when using
the autopilot. I also have an independant hall effect sensor measuring
amps on the fat wire to the battery.
Today I noticed on climb out that the hall effect sensor was showing
battery charge oscillating from +1.7A to +2.5A - normally it is steady. I
switched off the alternator and the hall effect sensor showed steady -7A in
agreement with the load shown on my dynon (7A). (I turned around and
landed immediately.) Voltage is steady.
I checked the alternator as per
https://pointsforpilots.blogspot.com/2012/12/testing-rotax-912914-generator-and.html.
All within limits.
So my next steps are to change the regulator, which involves taking out the
crowbar because the BandC had one internally, (I had already bought a
BandC voltage regulator some time ago) and the battery which is pretty much
due for a change.
Any other thoughts?
Thanks
William Daniell
LONGPORT
+1 786 878 0246
Message 5
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| Subject: | Re: Audio panel move |
Thanks gentlemen. The GMA 240 has two 44-pin connectors so, I presume, I would
require four connectors, two male and two female to make extension harnesses.
Bob, if you have these connectors in your stores, I would certainly be interested
in purchasing them and paying postage to Canada.
Thanks again.
David
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=503552#503552
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