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msausen
Joined: 25 Oct 2007
Posts: 559
Location: Appleton, WI USA
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 Posted: Fri Oct 07, 2011 12:07 pm Post subject: Panel Audio/Data Diagrams |
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Being a big fan of peer reviewed eye charts I thought I would throw my data/audio diagrams for my panel out to the group and see if anyone had any comments or thoughts on it. The first page just shows who is talking to who, the following pages are just a device view, and then there are two block diagrams near the end that show the connections between all the devices.
Michael
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N403SS_Panel_Data-Audio.pdf |
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dmaib@me.com
Joined: 25 Apr 2006
Posts: 454
Location: New Smyrna Beach, Florida
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| Posted: Fri Oct 07, 2011 1:58 pm Post subject: Re: Panel Audio/Data Diagrams |
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Looks like a great setup. You are going to love your VP-200. My Infinity grip is similar to yours, except I have rudder trim instead of flaps. My flap switch is on the panel. If I had it to do over again, I would make the pinky finger switch on the bottom of the grip, a starter button. VP protects you from accidentally engaging the starter when you don't want to. I just find it would be nice to be able to hold the stick with my left hand and throttle with the right while starting. As it is, I hold the stick between my knees, hit the starter button with my left hand and use the right hand for the throttle. Not a big enough deal for me to go back and change it now, but one of those things I would change on the build, knowing what I know now. I use the rudder trim so infrequently, that it could easily reside on the panel. In fact, I might not even put rudder trim in if I was doing it again. I have my ACK button where you have your flap control. I find that I use that button a lot, since it is also the button that advances you through the VP checklists. All personal preference, but my $.02 worth. Again, you are going to have a 1st class setup there.
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David Maib
RV-10 #40559
New Smyrna Beach, FL |
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Fri Oct 07, 2011 4:54 pm Post subject: Re: Panel Audio/Data Diagrams |
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Since you asked....
I have a Trio autopilot, so I'm not sure about yours, but mine puts out a warning tone on disconnect so you need an un-switched input on your audio panel for that.
The Dynon D-10 will put out a warning tone associated with the AOA (if you have the supporting pitot tube and plumbing) so you need an un-switched audio input for that.
Your SL-30 shows one audio line out. That will work (the SL-30 can combine com and nav audio internally) but many people like separate lines, so you can select them on the audio panel. Or use another un-switched input for the nav line and select it on the SL-30 itself (that's what I do).
I can't see what kind of Garmin GPS you have (not familiar with the new ones) but if it has a com and a VOR you'll need 2 lines to the audio panel for them.
Does your AFS EFIS put out any warning tones? Maybe for AOA? If so, another line to another un-switched input on the audio panel.
It's amazing how many wires go into these audio panels (no wonder labor costs are high on them), especially if you have a four place stereo intercom. (I didn't see the intercom wires on your diagram, either. But each person gets 5 wires plus shields.)
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Bob Turner
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Fri Oct 07, 2011 4:59 pm Post subject: Re: Panel Audio/Data Diagrams |
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What is the oxygen control (?) instrument pictured? I don't think I've ever seen that before.
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Bob Turner
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pitts_pilot(at)bellsouth.
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| Posted: Fri Oct 07, 2011 5:44 pm Post subject: Panel Audio/Data Diagrams |
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On 10/7/2011 8:54 PM, Bob Turner wrote:
Most of the extraneous audio inputs can be capacitive coupled to a
single unswitched input.
| Quote: |
It's amazing how many wires go into these audio panels (no wonder labor costs are high on them), especially if you have a four place stereo intercom. (I didn't see the intercom wires on your diagram, either. But each person gets 5 wires plus shields.)
5?? Lessee Audio L & R, Mic and Mic Key. My fingers say 4. So that's
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probably a typo??? 
And being the mean thing I am I didn't give the back seaters a mic key!!!!
Linn
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Fri Oct 07, 2011 10:37 pm Post subject: Re: Panel Audio/Data Diagrams |
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Tying together various outputs is okay as long as they all have a high impedance looking "backwards" into the device. Not all do. I've seen the old Cessna audio panels that just paralleled the inputs. As you selected more radios to "on", the volumes all dropped lower and lower. Not good.
No, I didn't mis-count the wires to the individual headsets. Good practice is to not use the airframe ground for the 'return' lines. This helps avoid ground loops which show up as unwanted noise. So you need a left, right, and common for the headphone, plus shield (3 wires inside a braided shield). For the mike, you need a 'hot' (to middle connector) and a 'return', plus shield (2 twisted wires inside a shield).
Install insulating washers under the jacks to keep the airframe out of the loop (Stein sells them).
Add one more wire if you want the passenger to have PTT! -
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Bob Turner
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msausen
Joined: 25 Oct 2007
Posts: 559
Location: Appleton, WI USA
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Sat Oct 08, 2011 12:52 pm Post subject: Re: Panel Audio/Data Diagrams |
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Thanks for the info. Looks very nice.
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Bob Turner
RV-10 QB |
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