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Date: Tue, 10 Mar 2009 22:36:34 -0400
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From: David Standish <carbonflier@bresnan.net>
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Subject: Re: [LML] Audio Panel Conundrum
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Have you checked the easy stuff like does the jack seat completely?  Are 
all the solder connections good?  Also I may be mistaken but I thought 
the tip and the first ring on the plug were signal and the base or shaft 
of the plug was common.  You can buy an adapter at radio shack to 
convert your stereo plug to a mono plug then use a mono jack for the 
intercom eliminating the question.  Do you get other audio ie radio 
transmissions in both sides?  If not the problem may be in you headset 
or its jack.

David


Greenbacks, UnLtd. wrote:
> My Apple I Touch has stereo output but my PS Engineering audio panel 
> (PMA4000) is monaural only. Their instructions for connecting an 
> entertainment device are as follows...
>
> PS Engineering
> PMA4000 Series Audio Selector Panel and Intercom System
> Installation Manual
> 200-041-0002 Page 2-3 Rev 5, March 2007
> 2.4.2 Entertainment Input
> A single entertainment device (CD player, cassette player, etc.) can 
> be connected to the
> unit. Install a 1/8-inch stereo jack in a convenient location so that 
> the pilot can plug in the
> entertainment device into the system.
> For a stereo input, we recommend tying the left and right channels 
> (tip and ring) together,
> so both stereo channels are provided to the monaural audio panel, and 
> the audio amplitude
> available to the audio panel is increased. Audio signal at the 
> entertainment input
> must be a minimum of 1V P-P for optimum music performance.
>
> As per their instructions, I purchased a stereo jack this weekend and 
> tied the left and right channels together.
> The problem is that I only have audio on the left side of the 
> headset(both pilot and copilot).
> I am assured that the audio panel wire harnesses are correct since my 
> wife took great pleasure in double checking all connections. 
>
> What might I be missing here?
>
> Angier Ames
> N4ZQ
>
>           
>