[arm-allstar] AC coupled audio

[Jim Korenz]

  Most modern radios use a bridge output amp for the audio. If you ground one side of the speaker, you may have problems. The solution is to use an isolation transformer, or to couple both speaker leads with a capacitor, say 10 uf or so. Put the plus side to the speaker. Then tie one neg cap lead to ground, and use the other as the audio source.
     JimK  N8PXW
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On Thu, 4/9/15, Robert Newberry <N1XBM at amsat.org> wrote:

 Subject: Re: [arm-allstar] AC coupled audio
 To: "BeagleBone Black ARM Allstar" <arm-allstar at hamvoip.org>
 Date: Thursday, April 9, 2015, 6:29 AM
 
 What I am
 confused about is I have been reading not to ground the
 other lead. If using the speaker leads. I've read things
 such as using an audio transformer or a capacitor. 
 I'm am wondering if anyone has done this
 and can offer any input. I am guessing that tapping the high
 side of the audio pot would also be the same as using the
 speaker leads other than it being controlled by the volume
 control.
 I'm just trying to avoid damaging my audio
 amplifier.  
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