<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_1_1438785483263_33348">Bernie,</div><div dir="ltr" id="yui_3_16_0_1_1438785483263_13962">Have a look with an oscilloscope at the audio output of your radio. Most radios have a DC offset of about 6vdc. This will be obvious if the radio has 2 pins for the external speaker as the lines are both DC biased to 1/2 the applied DC. The audio is out of phase on the 2 lines.</div><div id="yui_3_16_0_1_1438785483263_23632" dir="ltr"><br></div><div id="yui_3_16_0_1_1438785483263_33303" dir="ltr">This DC bias can be used as a COS. It may require the addition of a resistor to GND on the line you use as COS as when the squelch closes (no audio) it may not bleed off as rapidly as desired. Consider adding ~220 Ohms to GND. <br></div><div id="yui_3_16_0_1_1438785483263_33304" dir="ltr"><br></div><div id="yui_3_16_0_1_1438785483263_33305" dir="ltr">Good luck.</div><div id="yui_3_16_0_1_1438785483263_33306" dir="ltr">Barry w0iy</div><div id="yui_3_16_0_1_1438785483263_33307" dir="ltr"><br></div><div id="yui_3_16_0_1_1438785483263_8028"><span></span></div> <br><div class="qtdSeparateBR"><br><br></div><div style="display: block;" class="yahoo_quoted"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font face="Arial" size="2"> On Wednesday, August 5, 2015 7:52 AM, "arm-allstar-request@hamvoip.org" <arm-allstar-request@hamvoip.org> wrote:<br> </font> </div> <br><br> <div class="y_msg_container">----- Forwarded Message -----<br><br>Send arm-allstar mailing list submissions to<br> <a ymailto="mailto:arm-allstar@hamvoip.org" href="mailto:arm-allstar@hamvoip.org">arm-allstar@hamvoip.org</a><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br> <a href="http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar" target="_blank">http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar</a><br>or, via email, send a message with subject or body 'help' to<br> <a ymailto="mailto:arm-allstar-request@hamvoip.org" href="mailto:arm-allstar-request@hamvoip.org">arm-allstar-request@hamvoip.org</a><br><br>You can reach the person managing the list at<br> <a ymailto="mailto:arm-allstar-owner@hamvoip.org" href="mailto:arm-allstar-owner@hamvoip.org">arm-allstar-owner@hamvoip.org</a><br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of arm-allstar digest..."<br><br>Today's Topics:<br><br> 1. Re: New RPI2 installation IAXRpt drops out. (Bernie McIntosh)<br> 2. Re: New RPI2 installation IAXRpt drops out. (REDBUTTON_CTRL)<br> 3. Re: New RPI2 installation IAXRpt drops out. (Doug Crompton)<br> 4. Re: New RPI2 installation IAXRpt drops out. (Bernie McIntosh)<br> 5. Re: New RPI2 installation IAXRpt drops out. (Doug Crompton)<br> 6. Re: New RPI2 installation IAXRpt drops out. (Fred Moore)<br> <br><br>Hi,<br><br>First of all apologies for sending out earlier mails under the <br>silly "digest" subject header. I don't use lists very often and <br>this slipped by.<br><br>Secondly, thanks very much for the rapid help and support.<br><br>I don't want to move to using COS for two reasons. One is that <br>I have already purchased four soundcards that were from <br>different origins and all use the dreaded blob construction. <br>Looks like virtually all do these days. The vendor of the ones <br>you have listed will not ship to the uk. The other reason is <br>that the radio, which is part of the team's set, does not have <br>COS available.<br><br>We can always just up the budget and get something suitable but <br>here in the UK, mountain rescue is unpaid voluntary work and <br>the budget is accordingly tight. Another alternative is some <br>point to point audio streaming and a simple GPIO remote <br>operating program over ssh. In one sense using asterisk for my <br>problem is a bit of a sledgehammer to crack a nut. But iaxrpt <br>looks really good and easy to use as a dispatch console and <br>that's what drives me to use the full-blown apt-rpt solution.<br><br>So cogniscent of your advice - the receiver must present COS <br>even for a half-duplex remote access system, I thought I'd try <br>the usbradio solution and dsp COS. I was actually expecting it <br>to be poor after all that I've read, but in fact it seems to <br>work a treat. I've only done some basic bench testing so it is <br>early days, but the quality does seem good enough.<br><br>Again, because of the soundcard procurement problem, for the <br>PTT I've used the PI gpio and the channel variable/event <br>handler solution outlined a few times by others on the list. It <br>was a little tricky initially, with timing issues causing a <br>lock up. Remember I'm just operating a transceiver, not a <br>separate rx / tx combination and since I am using squelch COS <br>detection, when I go into TX from iaxrpt, the system thinks <br>that the receive channel is occupied and tries to perpuate the <br>TX forever.<br><br>Anyway, all resolved now and the system working perfectly the <br>way I wanted it. Doug, you sure have saved a lot of work with <br>your image and your support. I'm most grateful.<br><br><br>Very 73<br><br>Bernie<br>GM4WZG<br><br><br><br><br>We since you dont have a cor from the radio and you may not have <br>discriminator audio the dsp may not work for you.<br><br>the dsp option does require discriminator audio and will not work from a <br>speaker O/P.<br><br>But you can always use the Vox option when connected to the speaker.<br>I dont know if this option is supported on the RPI image but its a <br>possibility.<br><br>This way the node would only transmit packets when it is actually <br>receiving and not consistently sending data like taking the phone off <br>hook after dialing a number.<br><br>VA3RQ<br>Jon<br><br>On 8/4/2015 7:58 PM, Bernie McIntosh wrote:<br>><br>><br>> Hi,<br>><br>> First of all apologies for sending out earlier mails under the<br>> silly "digest" subject header. I don't use lists very often and<br>> this slipped by.<br>><br>> Secondly, thanks very much for the rapid help and support.<br>><br>> I don't want to move to using COS for two reasons. One is that<br>> I have already purchased four soundcards that were from<br>> different origins and all use the dreaded blob construction.<br>> Looks like virtually all do these days. The vendor of the ones<br>> you have listed will not ship to the uk. The other reason is<br>> that the radio, which is part of the team's set, does not have<br>> COS available.<br>><br>> We can always just up the budget and get something suitable but<br>> here in the UK, mountain rescue is unpaid voluntary work and<br>> the budget is accordingly tight. Another alternative is some<br>> point to point audio streaming and a simple GPIO remote<br>> operating program over ssh. In one sense using asterisk for my<br>> problem is a bit of a sledgehammer to crack a nut. But iaxrpt<br>> looks really good and easy to use as a dispatch console and<br>> that's what drives me to use the full-blown apt-rpt solution.<br>><br>> So cogniscent of your advice - the receiver must present COS<br>> even for a half-duplex remote access system, I thought I'd try<br>> the usbradio solution and dsp COS. I was actually expecting it<br>> to be poor after all that I've read, but in fact it seems to<br>> work a treat. I've only done some basic bench testing so it is<br>> early days, but the quality does seem good enough.<br>><br>> Again, because of the soundcard procurement problem, for the<br>> PTT I've used the PI gpio and the channel variable/event<br>> handler solution outlined a few times by others on the list. It<br>> was a little tricky initially, with timing issues causing a<br>> lock up. Remember I'm just operating a transceiver, not a<br>> separate rx / tx combination and since I am using squelch COS<br>> detection, when I go into TX from iaxrpt, the system thinks<br>> that the receive channel is occupied and tries to perpuate the<br>> TX forever.<br>><br>> Anyway, all resolved now and the system working perfectly the<br>> way I wanted it. Doug, you sure have saved a lot of work with<br>> your image and your support. I'm most grateful.<br>><br>><br>> Very 73<br>><br>> Bernie<br>> GM4WZG<br>><br>><br>> _______________________________________________<br>><br>> arm-allstar mailing list<br>> <a ymailto="mailto:arm-allstar@hamvoip.org" href="mailto:arm-allstar@hamvoip.org">arm-allstar@hamvoip.org</a><br>> <a href="http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar" target="_blank">http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar</a><br>><br>> Visit the BBB and RPi2 web page - <a href="http://hamvoip.org/" target="_blank">http://hamvoip.org</a><br>><br><br><br><div id="yiv9767477034">
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<div><div dir="ltr"><font style="" face="Tahoma,sans-serif" color="#000000">Bernie,<br><br>Glad you found a solution. usbradio will work although it can have rough audio even in the best of conditions on a PC. If it satisfies you then great. Also if this is a one way, just RX, why not leave the COS always keyed in simpleusb. Maybe I don't get the whole picture but if it is a private just to iaxrpt that should work. iaxrpt is full duplex in that you can send commands and audio downstream even if the other end is keyed.<br id="yiv9767477034FontBreak"></font><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">http://www.crompton.com/hamradio</font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div>> From: bmcintosh@paceprofessional.co.uk<br>> To: arm-allstar@hamvoip.org<br>> Date: Wed, 5 Aug 2015 00:58:47 +0100<br>> Subject: Re: [arm-allstar] New RPI2 installation IAXRpt drops out.<br>> <br>> <br>> <br>> Hi,<br>> <br>> First of all apologies for sending out earlier mails under the <br>> silly "digest" subject header. I don't use lists very often and <br>> this slipped by.<br>> <br>> Secondly, thanks very much for the rapid help and support.<br>> <br>> I don't want to move to using COS for two reasons. One is that <br>> I have already purchased four soundcards that were from <br>> different origins and all use the dreaded blob construction. <br>> Looks like virtually all do these days. The vendor of the ones <br>> you have listed will not ship to the uk. The other reason is <br>> that the radio, which is part of the team's set, does not have <br>> COS available.<br>> <br>> We can always just up the budget and get something suitable but <br>> here in the UK, mountain rescue is unpaid voluntary work and <br>> the budget is accordingly tight. Another alternative is some <br>> point to point audio streaming and a simple GPIO remote <br>> operating program over ssh. In one sense using asterisk for my <br>> problem is a bit of a sledgehammer to crack a nut. But iaxrpt <br>> looks really good and easy to use as a dispatch console and <br>> that's what drives me to use the full-blown apt-rpt solution.<br>> <br>> So cogniscent of your advice - the receiver must present COS <br>> even for a half-duplex remote access system, I thought I'd try <br>> the usbradio solution and dsp COS. I was actually expecting it <br>> to be poor after all that I've read, but in fact it seems to <br>> work a treat. I've only done some basic bench testing so it is <br>> early days, but the quality does seem good enough.<br>> <br>> Again, because of the soundcard procurement problem, for the <br>> PTT I've used the PI gpio and the channel variable/event <br>> handler solution outlined a few times by others on the list. It <br>> was a little tricky initially, with timing issues causing a <br>> lock up. Remember I'm just operating a transceiver, not a <br>> separate rx / tx combination and since I am using squelch COS <br>> detection, when I go into TX from iaxrpt, the system thinks <br>> that the receive channel is occupied and tries to perpuate the <br>> TX forever.<br>> <br>> Anyway, all resolved now and the system working perfectly the <br>> way I wanted it. Doug, you sure have saved a lot of work with <br>> your image and your support. I'm most grateful.<br>> <br>> <br>> Very 73<br>> <br>> Bernie<br>> GM4WZG<br>> <br>> <br>> _______________________________________________<br>> <br>> arm-allstar mailing list<br>> arm-allstar@hamvoip.org<br>> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar<br>> <br>> Visit the BBB and RPi2 web page - http://hamvoip.org<br>> <br></div> </div></div>
</div><br>Doug,<br><br>It does need to be two way - I was expressing myself poorly tying to explain<br>part of the problem.<br><br>Overnight the "solution" that I found has failed. Lots of strange behaviour,<br>and regular "Hangup 'DAHDI/Pseudo-46535" messages on console.<br><br>dahdi show channels shows around 20 channels in use. <br><br>All ok on reboot but there's ovbviously something funny going on in the long<br>term.<br><br>Am I right in thinking that the DAHDI channels are channels that link the<br>USBRadio module ? And that there shouldn't be twenty of them ? <br><br>Cheers<br><br>Benrie<br>GM4WZG<br><br><br><br>Bernie,<br><br>Glad you found a solution. usbradio will work although it can have rough<br>audio even in the best of conditions on a PC. If it satisfies you then<br>great. Also if this is a one way, just RX, why not leave the COS always<br>keyed in simpleusb. Maybe I don't get the whole picture but if it is a<br>private just to iaxrpt that should work. iaxrpt is full duplex in that you<br>can send commands and audio downstream even if the other end is keyed.<br>73 Doug<br>WA3DSP<br><a href="http://www.crompton.com/hamradio" target="_blank">http://www.crompton.com/hamradio</a><br><br><br><br><br><br><br><div id="yiv9767477034">
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<div><div dir="ltr"><font style="" face="Tahoma,sans-serif" color="#000000">Bernie,<br><br> You are having too many problems there. Perhaps you have a bad image or bad hardware. What you are seeing is not normal. I think you should try a new image and or hardware. <br id="yiv9767477034FontBreak"></font><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">http://www.crompton.com/hamradio</font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div>> From: bmcintosh@paceprofessional.co.uk<br>> To: arm-allstar@hamvoip.org<br>> Date: Wed, 5 Aug 2015 09:58:07 +0100<br>> Subject: Re: [arm-allstar] New RPI2 installation IAXRpt drops out.<br>> <br>> <br>> Doug,<br>> <br>> It does need to be two way - I was expressing myself poorly tying to explain<br>> part of the problem.<br>> <br>> Overnight the "solution" that I found has failed. Lots of strange behaviour,<br>> and regular "Hangup 'DAHDI/Pseudo-46535" messages on console.<br>> <br>> dahdi show channels shows around 20 channels in use. <br>> <br>> All ok on reboot but there's ovbviously something funny going on in the long<br>> term.<br>> <br>> Am I right in thinking that the DAHDI channels are channels that link the<br>> USBRadio module ? And that there shouldn't be twenty of them ? <br>> <br>> Cheers<br>> <br>> Benrie<br>> GM4WZG<br>> <br>> <br>> <br>> Bernie,<br>> <br>> Glad you found a solution. usbradio will work although it can have rough<br>> audio even in the best of conditions on a PC. If it satisfies you then<br>> great. Also if this is a one way, just RX, why not leave the COS always<br>> keyed in simpleusb. Maybe I don't get the whole picture but if it is a<br>> private just to iaxrpt that should work. iaxrpt is full duplex in that you<br>> can send commands and audio downstream even if the other end is keyed.<br>> 73 Doug<br>> WA3DSP<br>> http://www.crompton.com/hamradio<br>> <br>> <br>> <br>> <br>> _______________________________________________<br>> <br>> arm-allstar mailing list<br>> arm-allstar@hamvoip.org<br>> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar<br>> <br>> Visit the BBB and RPi2 web page - http://hamvoip.org<br>> <br></div> </div></div>
</div><div id="yiv9767477034">
<div>
Doug has posted the check sum data on the website, so it should be
easy to verify if you have a good download. <br>
<br>
Burnie, I also sent you a knowledgeable allstar UK contact offline a
few minutes ago.. He may be able to assist you in getting this
quickly resolved.. regards.. Fred<br>
<br>
<br>
<div class="yiv9767477034moz-cite-prefix">On 8/5/15 8:47 AM, Doug Crompton wrote:<br>
</div>
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<div dir="ltr"><font style="" face="Tahoma,sans-serif" color="#000000">Bernie,<br>
<br>
You are having too many problems there. Perhaps you have a
bad image or bad hardware. What you are seeing is not normal.
I think you should try a new image and or hardware. <br id="yiv9767477034FontBreak">
</font><br>
<b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br>
</font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br>
</font><font style="font-size:16pt;" size="4"><a rel="nofollow" class="yiv9767477034moz-txt-link-freetext" target="_blank" href="http://www.crompton.com/hamradio">http://www.crompton.com/hamradio</a></font></b><font style="font-size:16pt;" size="4"><br>
</font><br>
<br>
<div>> From: <a rel="nofollow" class="yiv9767477034moz-txt-link-abbreviated" ymailto="mailto:bmcintosh@paceprofessional.co.uk" target="_blank" href="mailto:bmcintosh@paceprofessional.co.uk">bmcintosh@paceprofessional.co.uk</a><br>
> To: <a rel="nofollow" class="yiv9767477034moz-txt-link-abbreviated" ymailto="mailto:arm-allstar@hamvoip.org" target="_blank" href="mailto:arm-allstar@hamvoip.org">arm-allstar@hamvoip.org</a><br>
> Date: Wed, 5 Aug 2015 09:58:07 +0100<br>
> Subject: Re: [arm-allstar] New RPI2 installation IAXRpt
drops out.<br>
> <br>
> <br>
> Doug,<br>
> <br>
> It does need to be two way - I was expressing myself
poorly tying to explain<br>
> part of the problem.<br>
> <br>
> Overnight the "solution" that I found has failed. Lots of
strange behaviour,<br>
> and regular "Hangup 'DAHDI/Pseudo-46535" messages on
console.<br>
> <br>
> dahdi show channels shows around 20 channels in use. <br>
> <br>
> All ok on reboot but there's ovbviously something funny
going on in the long<br>
> term.<br>
> <br>
> Am I right in thinking that the DAHDI channels are
channels that link the<br>
> USBRadio module ? And that there shouldn't be twenty of
them ? <br>
> <br>
> Cheers<br>
> <br>
> Benrie<br>
> GM4WZG<br>
> <br>
> <br>
> <br>
> Bernie,<br>
> <br>
> Glad you found a solution. usbradio will work although it
can have rough<br>
> audio even in the best of conditions on a PC. If it
satisfies you then<br>
> great. Also if this is a one way, just RX, why not leave
the COS always<br>
> keyed in simpleusb. Maybe I don't get the whole picture
but if it is a<br>
> private just to iaxrpt that should work. iaxrpt is full
duplex in that you<br>
> can send commands and audio downstream even if the other
end is keyed.<br>
> 73 Doug<br>
> WA3DSP<br>
> <a rel="nofollow" class="yiv9767477034moz-txt-link-freetext" target="_blank" href="http://www.crompton.com/hamradio">http://www.crompton.com/hamradio</a><br>
> <br>
> <br>
> <br>
> <br>
> _______________________________________________<br>
> <br>
> arm-allstar mailing list<br>
> <a rel="nofollow" class="yiv9767477034moz-txt-link-abbreviated" ymailto="mailto:arm-allstar@hamvoip.org" target="_blank" href="mailto:arm-allstar@hamvoip.org">arm-allstar@hamvoip.org</a><br>
>
<a rel="nofollow" class="yiv9767477034moz-txt-link-freetext" target="_blank" href="http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar">http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar</a><br>
> <br>
> Visit the BBB and RPi2 web page - <a rel="nofollow" class="yiv9767477034moz-txt-link-freetext" target="_blank" href="http://hamvoip.org/">http://hamvoip.org</a><br>
> <br>
</div>
</div>
<br>
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<pre class="yiv9767477034moz-signature">--
Fred Moore
email: <a rel="nofollow" class="yiv9767477034moz-txt-link-abbreviated" ymailto="mailto:fred@fmeco.com" target="_blank" href="mailto:fred@fmeco.com">fred@fmeco.com</a>
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