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I had another USB FOB, so I modified it. Works fine, so the first FOB I modified was bad.<br class="">
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<div class="">73,</div>
<div class="">Joe - AD2DX</div>
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<div class="">On Apr 7, 2016, at 10:59 PM, Doug Crompton via arm-allstar <<a href="mailto:arm-allstar@hamvoip.org" class="">arm-allstar@hamvoip.org</a>> wrote:</div>
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<font face="Tahoma,sans-serif" class="">Joe,<br class="">
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Obviously you have an audio problem. A scope would fine it in an instant but you could signal trace with an amplifier and speaker. If audio is getting to the FOB chip then you might have a bad FOB. It has been known to happen. The FOB is working with outbound
audio? The FOB green LED is blinking properly? Having no audio at all with rxboost=1 and levels turned up to max would possibly indicate a short somewhere in the audio path.<br id="FontBreak" class="">
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<b class=""><font size="4" style="font-size: 16pt;" class="">73 Doug</font><font size="4" style="font-size: 16pt;" class=""><br class="">
</font><font size="4" style="font-size: 16pt;" class="">WA3DSP</font><font size="4" style="font-size: 16pt;" class=""><br class="">
</font><font size="4" style="font-size: 16pt;" class=""><a href="http://www.crompton.com/hamradio" class="">http://www.crompton.com/hamradio</a></font></b><font size="4" style="font-size: 16pt;" class=""><br class="">
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<div class="">> To:<span class="Apple-converted-space"> </span><a href="mailto:arm-allstar@hamvoip.org" class="">arm-allstar@hamvoip.org</a><br class="">
> Date: Fri, 8 Apr 2016 00:20:41 +0000<br class="">
> Subject: [arm-allstar] USB FOB Problem<br class="">
> From:<span class="Apple-converted-space"> </span><a href="mailto:arm-allstar@hamvoip.org" class="">arm-allstar@hamvoip.org</a><br class="">
> CC:<span class="Apple-converted-space"> </span><a href="mailto:ad2dx@ad2dx.us" class="">ad2dx@ad2dx.us</a><br class="">
><span class="Apple-converted-space"> </span><br class="">
> I built a USB Sound FOB Interface. Everything works fine except when I go into simpleusb-tune-menu 2) Set RX Voice Level, and speak into the mic on the radio that is transmitting to the node radio, I can see the > sign, but no audio. When I unkey, the > sign
disappears, so I know that it is seeing something. I shut down and replace the USB FOB with my URi, all is well.<br class="">
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> On the schematic “USB FOB simplified schematic.pdf”, I used a 10uF electrolytic cap in the RX Audio line, along with a 47K resistor, and a 68K to ground at that junction, just like it is in the schematic. The polarization of the cap has been verified. For
kicks, I tacked another 47K in parallel with the 47K, but no change. I do not have a scope. Any ideas?<br class="">
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> 73,<br class="">
> Joe - AD2DX<br class="">
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> Visit the BBB and RPi2 web page -<span class="Apple-converted-space"> </span><a href="http://hamvoip.org/" class="">http://hamvoip.org</a><br class="">
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