Matronics Email Lists :: View topic - Mic audio ground

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

Mic audio ground - PMA8000B

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

JohnT(at)comp-sol.com
Guest

Posted: Fri Jul 14, 2006 7:16 am Post subject: Mic audio ground - PMA8000B

Say - on the PMA7000, 8000 or GMA340 audio panels...none of them have a

dedicated return (ground) for the Mic Gnd (used on SL30/40 & GNS480).  I

would assume the 'dedicated' returns are all connected together

internally - and are there for ease of install - i.e. to pin 10,11.....



Anyone have some advice as to what to hook up the Mic Gnd to on a

PMA8000 series audio panel? 

-------------------------



Say - I noticed that the PMA7000 vs the PMA8000 and GMA340 have opposite

convention on the tip and middle tip of the audio plugs - for L/R use.

Obviously the input tip/middle tips are changed as well - so pass thru

is just fine.



Is there actually a convention used? - just curious....

- 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 Jul 14, 2006 10:28 am Post subject: Mic audio ground - PMA8000B

On Jul 14, 2006, at 11:11 AM, John Tvedte wrote:

 	  Quote: 	
		  

 Anyone have some advice as to what to hook up the Mic Gnd to on a

 PMA8000 series audio panel?


	


Insulate the mic jack from the airframe. Return the shell to the  

ground at the audio panel. All your mic inputs will return to this  

same common ground at the audio panel.



Do not return your mic grounds to the single-point power ground at  

the firewall.



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-Exupéry

- 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

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