[arm-allstar] low audio with full-888s

[Doug Crompton]

Peter,

   I want to make sure we are talking about the same thing when you say TX
audio.  TX and RX audio for a node are usually always referenced to the
node itself. So TX audio is what you hear on your handheld and RX audio is
what other hear from your handheld or radio talking to your node.

Pin 21 of the DMK URI is where RX audio is applied from, in your case, the
888.  Pin 22 is is TX audio to the 888.

The simpleusb-tune-menu program sets these levels.  Item 2 in the menu is
RX audio and item 3 is TX audio. So item 3 sets the level of what you hear
on your radio listening to your node and item 2 sets what others hear from
your radio.

In addition the B command toggles the RX boost.

The first thing to do is to use item 2 in the simpleusb-tune-menu to set
you RX level. There is a bar graph and whn you talk into your radio,
transmitting to your node radio, you will see the bar graph respond. It
should got to 5-6 Khz on the display on voice peaks. It is does not you set
the value higher. Values are 1-999 and it is set to 500 at start. If you
are way up in numbers and still not where you want to be then you can turn
the boost on. If you are way low and still to high you  can turn boost off.

Next Item 3 in the menu is what you hear from others on your radio. This
can be set by adjusting the radio to a known level from a known sourse like
a local repeater. Then adjust the level to match the known level. Never so
high to cause distortion.

If you can't get the level correct the resistors on the audio lines from
and to the 888 can be can be raised or lowered in value to get in range.


*73 Doug*

*WA3DSP*

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


On Wed, Mar 28, 2018 at 10:43 AM, "VE3kai via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

>
> Hello all.  I just did the modification to my baofeng bf-888s. I have a
> DMK URIx that I have connected to it. I followed Mr Crompton's instructions
> on his web site to the letter.  My version on the board is the newer short
> version.  So i followed the section contributed by WB3DZZ.   I also have a
> Raspberry PI 3 using the latest version of  code (1.5 xxx cr17)
>
> I am able to connect to a node or reflector no problem. I can issue all
> start and stop commands with no problem.  I hear the audio of the east
> coast reflector with no problem.  The staton ID is transmitted every 9
> minutes which comes out very clear. The issue I have is my transmit audio
> is low.  To the point people can't hear me.  I disconnected the bf-888s
> from the URIx and just did a local transmit and sure enough the audio is
> very low.  I will be rechecking all my solder connections etc.  Has anyone
> had a similar issue?
>
> One thing I just thought of while writing this article is to try a
> handheld mic. I will try this when I get home later this morning.
>
> Peter VE3KAI 73
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