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Audio Isolation Amplifier

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mitch(at)skybound.com
Guest

Posted: Thu May 04, 2006 8:46 am Post subject: Audio Isolation Amplifier

Hey Bob & everybody -



I've got a Garmin 430, 330, and my own "box" (moving map & stereo music 

for our discussion here).  I also have audio from an RST Marker Beacon, 

maybe a warning tone or two, and in the future perhaps from a Nav 122D.  

I have no audio panel, and a NAT stereo intercom.  The NAT has balance 

controls so I can have COM more in the left ear, and intercom more in 

the right ear.



Should I just build the iso amp project as a mono board and use it to 

combine NAV and warning tones and pipe that into that NATs  "aux" audio 

input?  And then run my box's output to NAT's music in, and COM direct 

to the NAT?



Thanks for any help on this -



Mitch Faatz  RV-6A  Finish Kit   Auburn, CA

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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Thu May 04, 2006 11:20 am Post subject: Audio Isolation Amplifier

Mitchell Faatz wrote:



 	  Quote: 	
		   Should I just build the iso amp project as a mono board and use it to 

 combine NAV and warning tones and pipe that into that NATs  "aux" audio 

 input?  And then run my box's output to NAT's music in, and COM direct 

 to the NAT?

 

 Thanks for any help on this -


	


Well, first you need to think about what you want to do. How many audio

sources do you have? Which ones do you want to be able to switch on and

off? (To be honest, you will probably want to be able to switch all your

audio sources.) Which ones are stereo and which are mono? Which ones do

you want to have precedence? Some audio panels will drop the volume or

mute some source when others become active, e.g. music will mute when

you receive something on the comm.



What about integrating a handheld or a cell phone? Every audio system I

do in the future will have provision to patch in a cell phone so I can

make a call while using the standard aircraft headsets as I often end up

sitting at the end of a runway waiting for an IFR release over the phone

from FSS.



Then you need to think about how you are going to handle transmitters.

Do you have two comms? Do you want to be able to use them separately,

i.e. with the left seat talking on comm one while the right seat is

talking on comm two?



Lay out your logic for what goes where then we can tackle how to do it.



Brian Lloyd

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_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery

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