Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

AeroElectric-List:

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

brian

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

Posted: Thu Apr 20, 2006 6:34 am Post subject: AeroElectric-List:

Nathan Ulrich wrote:



 	  Quote: 	
		   So, back to my original question. Any way to "split" the audio from the 396

 so it can feed both MUSIC 1 and MUSIC 2 without changing volume depending on

 whether one or both is active?


	


Here is what I did with my PMA-7000 which has the same set of dual music 

inputs, i.e. "front office" and pax.



I installed separate jacks for the two inputs. I added a DPST switch to 

bridge the two inputs together. Switch on and both hear the same source. 

Switch off and I can put in different sources.



Don't worry about the level going down when you tie the two inputs 

together. Their input impedance is pretty high compared to any signal 

source you will plug in. I doubt you will hear any level difference at 

all with them tied together.



You can use a pair of DPDT switches to allow you to select between XM 

audio and external audio for each input. Imagine you have J1 and J2 

(input jacks), and S1 and S2 (switches). J1 is the input for pilot and 

J2 is input for pax. S1 is selector for pilot and S2 is selector for pax.



XM audio feeds one set of terminals for S1. J1 feeds other set of 

terminals for S1. Center terminals for S1 feeds pilot input to audio panel.



J2 feeds one set of terminals for S2. Center terminals from S2 feeds pax 

input on audio panel. The remaining terminals for S2 connect back to the 

center terminals on S1.



(I should make a schematic for this.)



Here is your logic list:



S1 position 1 -- pilot hears XM radio

S1 position 2 -- pilot hears source from J1



S2 position 1 -- pax hear source from J2

S2 position 2 -- pax hear what pilot hears.



Place J2 and S2 in the back seat. Now your pax can plug in their own 

source (walkman, diskman, iPod, etc.) and switch S2 and not bother the 

pilot. Good for kids who prefer Marky Mark to Frank Sinatra, or, worse 

still, pilot who is practicing scat solos. (I sing in a jazz ensemble 

and often practice while on long cross country flights. My kids 

definitely know what the "pilot isolate" switch does on the audio panel.)



Hopefully this will solve your problem.



-- 

Brian Lloyd                         361 Catterline Way

brian-yak at lloyd dot com          Folsom, CA 95630

+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

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
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

martorious(at)earthlink.n
Guest

Posted: Fri Apr 21, 2006 5:16 am Post subject: AeroElectric-List:

The way this is set up if the crew were listening to input from j1, the pax

would not be able to listen to the xm input, a better solution would be to

jumper the xm signal to imput terminals of both switches instead of carrying

the output of one switch to the input of the second switch.

Marty



--

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

brian

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

Posted: Fri Apr 21, 2006 6:18 am Post subject: AeroElectric-List:

Marty wrote:

 	  Quote: 	
		   

 

 

 The way this is set up if the crew were listening to input from j1, the pax

 would not be able to listen to the xm input, a better solution would be to

 jumper the xm signal to imput terminals of both switches instead of carrying

 the output of one switch to the input of the second switch.


	


There are many things you can do and much complexity you can add. My 

thinking, based on experience with several combinations in different 

aircraft, was that most of the time everyone is going to want to listen 

to the same source and I am only going to want to plug it in one place. 

What you have suggested precludes plugging the iPod into the pilot's 

jack and then having that audio available to the pax.



If you want complete control for the pax you can put in a DPTT switch to 

select XM, J1 (pilot input), or J2 (pax input). I don't want just one 

external music source as I can assure you from experience that there is 

almost nothing my kids listen to in the back seat that I want to listen 

to for more than about three minutes.



But flexibility is good. Let's see if we can't come up with the optimum 

combination. We will almost certainly need to add a remote control for 

the XM radio. Then don't forget the remote control for the iPod. Don't 

forget the graphic equalizer so the pax can tailor their audio to their 

taste. And of course you would want a pitch-corrector and harmonizer 

(vocoder) for the pilot's audio so his singing would be on-key even if 

it is off-key. We can probably add a good MIDI keyboard for 

accompaniment. Oh shoot, how stupid of me. I forgot the espresso 

machine! How can one listen to music without a good two-shot, low-fat, 

mochachino latte?!? What was I THINKING!



Has anybody seen my cup-warmer around here anywhere?



-- 

Brian Lloyd                         361 Catterline Way

brian-yak at lloyd dot com          Folsom, CA 95630

+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

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

martorious(at)earthlink.n
Guest

Posted: Fri Apr 21, 2006 7:15 am Post subject: AeroElectric-List:

Gee, Brian, didn't mean to push any buttons, just presenting an alternative.



If you want full control, just put another dpdt between j1 and j2 set it up

so it would either tie the two jacks together or isolate them from each

other depending on switch position.



And don't forget the placard stating "Hot beverages are served VERY hot."

Just to c.y.a., you don't want any frivolous lawsuits from a scalded

passenger.



Marty



--

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

deej(at)deej.net
Guest

Posted: Fri Apr 21, 2006 7:29 am Post subject: AeroElectric-List:

Brian Lloyd wrote:

 	  Quote: 	
		  

 Has anybody seen my cup-warmer around here anywhere?



   


	


    It is just behind that large fan, but you might want to use a

spill-proof cup!  *wink*



-Dj

do not archive



-- 

Dj Merrill

Glastar Sportsman 2+2 Builder #7118

http://econ.duke.edu/~deej/sportsman/



"Many things that are unexplainable happen during the construction of an 

airplane."  --Dave Prizio, 30 Aug 2005

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

brian

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

Posted: Fri Apr 21, 2006 9:05 am Post subject: AeroElectric-List:

Marty wrote:

 	  Quote: 	
		   

 

 Gee, Brian, didn't mean to push any buttons, just presenting an alternative.


	


Oh, I know. I should have added a smiley in there somewhere in the first

part.



 	  Quote: 	
		   If you want full control, just put another dpdt between j1 and j2 set it up

 so it would either tie the two jacks together or isolate them from each

 other depending on switch position.


	


DPST, but yes, that would work just fine.



 	  Quote: 	
		   And don't forget the placard stating "Hot beverages are served VERY hot."

 Just to c.y.a., you don't want any frivolous lawsuits from a scalded

 passenger.


	


Good point. I can't believe I forgot that part.

Brian

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum