[arm-allstar] Audio question

[Doug Crompton]

Robert,

  When you say "the possibility of the receive audio being turned up to
loud" indicates you are taking the audio from the wrong place. The best
thing to do is have NO pots or at the very least NO accessible pots in the
audio path. Usually you take audio from the radio before the volume
control. As a for instance when we modify the Baofeng 888 or UV82 the audio
is taken from the high side of the volume pot where the audio level is
constant. Then if the level is too high to put directly into the FOB a
resistive divider is used to reduce it. All level control is then done
electronically in the software. I suggest you find a point on your receiver
where the audio level is constant and use that to drive the FOB.

While technically you could damge the FOB with too much level that level
would be far higher than you would get from most receivers and it would
certainly be well into distortion or clipping of the audio to Allstar.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*



On Tue, Feb 27, 2018 at 7:31 PM, "Robert Forest via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> I am putting together a 440 repeater for my pi uri combo. Do you think I
> should put a potentiometer on the receive line to prevent the audio on the
> receive radio being turned up too loud? I was afraid an accidental bump of
> the volume might over drive the uri and cause damage.
>
> Thanks
> AA4II
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