[arm-allstar] Very low audio.

[Fred Cirera]

Doug,

Thank you for your help, this works great! I just connected the RX to the pin 9, with a 10µF capacitor and this solved my problem. I didn’t have to install a pot, because the mod on the UV-82 takes the RX right before the audio amp (the radio pot is ineffective).
I am now running without rxboost and the RX voice level is at 600 instead of 1200 like before.

The next step for me is to put everything in a nice box.

Brian KK6DOQ, you should try this. I am pretty sure it will work for you as well. 

I am looking forward to ragchew with you all on AllStar. 

73 and thanks again.

-fred-


> On Apr 1, 2019, at 4:05 PM, Doug Crompton via ARM-allstar <arm-allstar at hamvoip.org> wrote:
> 
> Fred,
> 
>   I am assuming those mods are still valid I certainly think they are.
> Taking audio from the high side of the volume pot.  George has shipped
> hundreds of these in yellow boxes and I believe he is using the same
> modification. He is not using a DMK-URI though and as far as I know he has
> never used one with a UV82. That's not to say it should not work. The
> problem with the DMK-URI is that it has level reduction (a resistive
> divider) internally on the AC input pin 21. There is another option - use
> pin 9 mic in which is a direct connect to  the CM119.  You must use a
> coupling cap - say 4-10uf @16V or more positive towards pin 9.  Then use
> the resistor over to the pot in the UV82.  At this point there might be too
> much gain and you may need to turn off the boost. Dpn't connect anything to
> the URI pin 21 when using pin 9.
> 
> If that doesn't work don't give up this will work. You either have a bad
> DMK-URI or you need to get a FOB that works with that radio. I can say for
> sure the one George sells the ARA-1 works with that radio.
> 
> If this does not work minus having some test equipment or another radio you
> can try there is no way of telling what is wrong.
> 
> 
> *73 Doug*
> 
> *WA3DSP*
> 
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio> <http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>>*
> 
> 
> On Mon, Apr 1, 2019 at 6:49 PM "Fred C. via ARM-allstar" <
> arm-allstar at hamvoip.org <mailto:arm-allstar at hamvoip.org>> wrote:
> 
>> 
>> Hi everyone,
>> 
>> I am new to AllStar and new to that mailing list and I might ask a
>> question that has been answered server time. I haven’t found the answer to
>> my problem tho.
>> 
>> I have installed hamvoip, on a Raspberry Pi 3B+, I am using the URI made
>> by DMK Engineering and a Baofeng UV-82, with the mods found on the hamvoip
>> website. Everything seems to be working ok besides my low, very low audio.
>> People I am talking with can barely hear me. On the receive everything is
>> fine.
>> 
>> I have tried all the obvious things I could find on the internet, but
>> nothing seems to be working. I have played with simple_usb_tune. The RX
>> Boost Mode is on (1), my Rx Voice Level is set to 999. I have checked the
>> alsamixer and the microphone input is all the way up. I have even try to
>> remove the 4.7kΩ resistor on the DB25 connector and don’t get any
>> improvements.
>> 
>> I was wondering if someone had encountered this problem before or if
>> something had an idea that I haven’t explored yet.
>> 
>> 73,
>> 
>> -fred-
>> 
>> --
>> Fred C. (070 #2569)
>> w6bsd at bsdworld.org <mailto:w6bsd at bsdworld.org> <mailto:w6bsd at bsdworld.org <mailto:w6bsd at bsdworld.org>>https://www.qrz.com/db/W6BSD <https://www.qrz.com/db/W6BSD>
>> <https://www.qrz.com/db/W6BSD <https://www.qrz.com/db/W6BSD>>
>> 
>> 
>> 
>> 
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>> 
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>> 
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