<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym18_1_1459462608090_41141"><span></span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1459462608090_41142">Impedance matters. That the output/source circuit and/or the input/load circuit mis-match alters frequency response is sloppy implementation.</div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1459462608090_41142"><br></div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1459462608090_41142">Unless you have complete control over system components design and implementation, it is prudent for audio-take-off/recipients/input circuits to not terminate at whatever unknown source impedance, but instead bridge-tap at 10k ohms.<br><br>The outputs you have design/implementation control over can be whatever you want, but convention is typically 600 ohms, 0 dB max standard level from 300-3000 Hz. <br><br>Squelch noise detection from an Rx detector may begin at 4 KHz (marginally low) or typically 6 KHz for white noise. The Motorola Micor SQ chips and not so obvious app notes indicate/allow a higher frequency detection limit at the base/repeater (6KHz) than the mobile (more subject to flutter) of 4KHz.<br><br>All that yadda aside... folks need to learn that audio connections between unknown gear might best be bridging (10k ohms) to get audio, and should provide/tolerate 600 Ohms to give audio. If even bridging affects the frequency response the source audio point is questionably engineered/implemented.</div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1459462608090_41142"><br></div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1459462608090_41142">Impedance matters.<br><br><br></div><div class="qtdSeparateBR" id="yui_3_16_0_ym18_1_1459462608090_41142"><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym18_1_1459462608090_41124" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym18_1_1459462608090_41123"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym18_1_1459462608090_41122"> <div dir="ltr" id="yui_3_16_0_ym18_1_1459462608090_41143"> <font size="2" face="Arial" id="yui_3_16_0_ym18_1_1459462608090_41195"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> "app_rpt-users-request@ohnosec.org" <app_rpt-users-request@ohnosec.org><br> <b><span style="font-weight: bold;">To:</span></b> app_rpt-users@ohnosec.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, April 2, 2016 6:07 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> App_rpt-users Digest, Vol 86, Issue 5<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym18_1_1459462608090_41121"><br>Send App_rpt-users mailing list submissions to<br> <a ymailto="mailto:app_rpt-users@ohnosec.org" href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br> <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br>or, via email, send a message with subject or body 'help' to<br> <a ymailto="mailto:app_rpt-users-request@ohnosec.org" href="mailto:app_rpt-users-request@ohnosec.org">app_rpt-users-request@ohnosec.org</a><br><br>You can reach the person managing the list at<br> <a ymailto="mailto:app_rpt-users-owner@ohnosec.org" href="mailto:app_rpt-users-owner@ohnosec.org">app_rpt-users-owner@ohnosec.org</a><br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of App_rpt-users digest..."<br><br><br>Today's Topics:<br><br> 1. Re: Hamtronics receiver issue with AllStar RTCM (Chuck Henderson)<br> 2. How to add chan_rtpdir.c to DIAL (Michael J. Wolthuis)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Sat, 2 Apr 2016 16:06:16 -0500<br>From: Chuck Henderson <<a ymailto="mailto:rpt2@chuck.midlandsnetworking.com" href="mailto:rpt2@chuck.midlandsnetworking.com">rpt2@chuck.midlandsnetworking.com</a>><br>To: Skyler F <<a ymailto="mailto:electricity440@gmail.com" href="mailto:electricity440@gmail.com">electricity440@gmail.com</a>><br>Cc: "<a ymailto="mailto:app_rpt-users@ohnosec.org" href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a>" <<a ymailto="mailto:app_rpt-users@ohnosec.org" href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a>><br>Subject: Re: [App_rpt-users] Hamtronics receiver issue with AllStar<br> RTCM<br>Message-ID:<br> <CADEYVwhCSq8vx+<a ymailto="mailto:g58i8tZVHGM5P6CvKsAiq2QeHqPmXzefFLKw@mail.gmail.com" href="mailto:g58i8tZVHGM5P6CvKsAiq2QeHqPmXzefFLKw@mail.gmail.com">g58i8tZVHGM5P6CvKsAiq2QeHqPmXzefFLKw@mail.gmail.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>"Once you have verified that the firmware is running, place a jumper shunt<br>on JP8 and JP10. Be sure to<br>do this at a reasonable human room temperature (like 60-80 deg. F). This is<br>necessary because this<br>procedure initializes the operating parameters in the EEPROM and also does<br>a *temperature compensation*<br>*diode calibration* which needs to happen at room temperature. Once the<br>jumper shunts<br>have been installed, power-cycle the board and wait for the system activity<br>light to come on steady<br>(about 4 seconds or so after the 5 second initial wait time). Then remove<br>the jumper shunts."<br><br>>From <a href="https://allstarlink.org/votersystem.pdf" target="_blank">https://allstarlink.org/votersystem.pdf </a>page 20<br>Chuck<br><br><br>On Sat, Apr 2, 2016 at 3:23 PM, Skyler F <<a ymailto="mailto:electricity440@gmail.com" href="mailto:electricity440@gmail.com">electricity440@gmail.com</a>> wrote:<br><br>> Well stupid me for not listening to you guys. I guess the hamtronics is<br>> really sensitive to low impedance outputs, and the highs get cut off if you<br>> have any sort of load at all. When I turned on the internal amplifier, the<br>> RTCM was happy with calibrating squelch.<br>><br>> Can anybody explain to me what "Diode calibration" means?<br>><br>> 73,<br>> Skyler<br>><br>> On Wed, Mar 30, 2016 at 5:42 PM, Joe Leikhim <<a ymailto="mailto:rhyolite@leikhim.com" href="mailto:rhyolite@leikhim.com">rhyolite@leikhim.com</a>> wrote:<br>><br>>> Skyler;<br>>><br>>> Here is a wideband VHF 136-156 MHz radio that will solve your ham club<br>>> problems for $35 each. If these were UHF I would be buying a bushel full.<br>>> You will need to get the programming software from Ritron. I think it is<br>>> free.<br>>><br>>> There are similar models with an enclosure, but for much more $$.<br>>><br>>> See the auction below on E-Bay:<br>>><br>>> Seller dale575<br>>><br>>> Ritron VHF Transceiver PCA, 136-156MHZ, 5 Watt, Model DTX-142-GCWD-I<br>>><br>>><br>>> <a href="http://www.ebay.com/itm/Ritron-VHF-Transceiver-PCA-136-156MHZ-5-Watt-Model-DTX-142-GCWD-I/191557457767?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D35389%26meid%3D4bbbffc700cc4aefba654c3ce0d394f8%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D401085025343" target="_blank">http://www.ebay.com/itm/Ritron-VHF-Transceiver-PCA-136-156MHZ-5-Watt-Model-DTX-142-GCWD-I/191557457767?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D35389%26meid%3D4bbbffc700cc4aefba654c3ce0d394f8%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D401085025343</a><br>>><br>>><br>>><br>>> On 3/30/2016 12:11 PM, Skyler F wrote:<br>>><br>>> Factory tuned from the factory. And I don't even have a signal generator<br>>> / counter good for RF. We got one hamtronics board, and won't buy another<br>>> until we get this one working.<br>>><br>>> On Wed, Mar 30, 2016 at 10:08 AM, Joe Leikhim <<a ymailto="mailto:rhyolite@leikhim.com" href="mailto:rhyolite@leikhim.com">rhyolite@leikhim.com</a>><br>>> wrote:<br>>><br>>>> Were these receivers factory built and tuned or did individual club<br>>>> members build them? Either way, you might try others from the lot. If you<br>>>> have only a rudimentary signal generator and / or frequency counter,<br>>>> perhaps I can walk you through some "field expedient" steps over the phone.<br>>>><br>>>><br>>>> On 3/30/2016 12:01 PM, Skyler F wrote:<br>>>><br>>>> I don't have the test equipment to go through all of the dirty Local<br>>>> Oscilator, SINAD, etc., so I will have to wait on that a few weeks before<br>>>> the president of the club gets back in town.<br>>>><br>>>> WHEN I bypassed the capacitor and resistor ( 1k and .03?) , the RTCM was<br>>>> able to calibrate squelch. The LED flashed several times and then was<br>>>> steady. Maybe the capacitor is the wrong value. There was no code on it,<br>>>> but based on the resistor code, the value was correct.<br>>>><br>>>> 73<br>>>> Skyler<br>>>><br>>>> On Mon, Mar 28, 2016 at 4:08 PM, Joe Leikhim < <<a ymailto="mailto:rhyolite@leikhim.com" href="mailto:rhyolite@leikhim.com">rhyolite@leikhim.com</a>><br>>>> <a ymailto="mailto:rhyolite@leikhim.com" href="mailto:rhyolite@leikhim.com">rhyolite@leikhim.com</a>> wrote:<br>>>><br>>>>> If you are using an external reference, you cannot make up for the 2nd<br>>>>> LO error if it is wildly off. There is an easy SINAD related test in<br>>>>> EIA-603 that is called Offset Acceptance Bandwidth that would indicate if<br>>>>> the IF were off center. Things that could go wrong apart from simple<br>>>>> misalignment of the Quad Detector coil could include the LO crystal being<br>>>>> way off frequency, the IF filters being wrong BW or off spec pass frequency.<br>>>>><br>>>>> Given the symptoms, I am putting my money on a misadjusted quad coil.<br>>>>><br>>>>> Joe<br>>>>><br>>>>> On 3/28/2016 5:06 PM, Bryan Fields wrote:<br>>>>><br>>>>>> On 3/28/16 2:51 PM, Joe Leikhim wrote:<br>>>>>><br>>>>>>> 1) Make sure the receiver First Local Oscillator is adjusted correctly<br>>>>>>> on frequency. (Fo -10.700 MHz) Likewise the second LO should be at<br>>>>>>> around 10.2450 MHz. The second LO is not adjustable, so any minor<br>>>>>>> error<br>>>>>>> would have to be made up with the TCXO U3. After this second step:<br>>>>>>><br>>>>>>> Then :<br>>>>>>><br>>>>>>> 2) Make sure the general alignment is set properly, especially the<br>>>>>>> discriminator coil T2 which responds to 10.7000 MHz from a signal<br>>>>>>> generator, has an S curve response. In my experience with these sort<br>>>>>>> of<br>>>>>>> Quadrature Detector chips, you can get a false sense of IF centering<br>>>>>>> where the noise component is suppressed. You might try adjusting for<br>>>>>>> maximum noise first without the 10.7000 MHz signal. Be careful you<br>>>>>>> don't<br>>>>>>> jam the coil slug.<br>>>>>>><br>>>>>> These are both very good points i didn't consider. I normally don't<br>>>>>> check my<br>>>>>> reference oscillators in the hamtronics as they are using an external<br>>>>>> 10MHz<br>>>>>> source.<br>>>>>><br>>>>>> You will want to check SINAD on it as well, if it's not making spec<br>>>>>> (and those<br>>>>>> hamtronics are very sensitive), something else is wrong with it.<br>>>>>><br>>>>>><br>>>>> --<br>>>>> Joe Leikhim<br>>>>><br>>>>><br>>>>> Leikhim and Associates<br>>>>><br>>>>> Communications Consultants<br>>>>><br>>>>> Oviedo, Florida<br>>>>><br>>>>> <a ymailto="mailto:JLeikhim@Leikhim.com" href="mailto:JLeikhim@Leikhim.com">JLeikhim@Leikhim.com</a><br>>>>><br>>>>> 407-982-0446<br>>>>><br>>>>> WWW.LEIKHIM.COM<br>>>>><br>>>>> _______________________________________________<br>>>>> App_rpt-users mailing list<br>>>>> <a ymailto="mailto:App_rpt-users@ohnosec.org" href="mailto:App_rpt-users@ohnosec.org">App_rpt-users@ohnosec.org</a><br>>>>> <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br>>>>><br>>>>> To unsubscribe from this list please visit<br>>>>> <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users </a>and scroll<br>>>>> down to the bottom of the page. Enter your email address and press the<br>>>>> "Unsubscribe or edit options button"<br>>>>> You do not need a password to unsubscribe, you can do it via email<br>>>>> confirmation. If you have trouble unsubscribing, please send a message to<br>>>>> the list detailing the problem.<br>>>>><br>>>><br>>>><br>>>><br>>>> --<br>>>> Skyler Fennell<br>>>> amsatnet.info<br>>>> KD?WHB<br>>>> <a ymailto="mailto:electricity440@gmail.com" href="mailto:electricity440@gmail.com">electricity440@gmail.com</a><br>>>><br>>>><br>>>> --<br>>>> Joe Leikhim<br>>>><br>>>><br>>>> Leikhim and Associates<br>>>><br>>>> Communications Consultants<br>>>><br>>>> Oviedo, Florida<br>>>> <a ymailto="mailto:JLeikhim@Leikhim.com" href="mailto:JLeikhim@Leikhim.com">JLeikhim@Leikhim.com</a><br>>>> 407-982-0446<br>>>> WWW.LEIKHIM.COM<br>>>><br>>>><br>>><br>>><br>>> --<br>>> Skyler Fennell<br>>> amsatnet.info<br>>> KD?WHB<br>>> <<a ymailto="mailto:electricity440@gmail.com" href="mailto:electricity440@gmail.com">electricity440@gmail.com</a>><a ymailto="mailto:electricity440@gmail.com" href="mailto:electricity440@gmail.com">electricity440@gmail.com</a><br>>><br>>><br>>> --<br>>> Joe Leikhim<br>>><br>>><br>>> Leikhim and Associates<br>>><br>>> Communications Consultants<br>>><br>>> Oviedo, Florida<br>>> <a ymailto="mailto:JLeikhim@Leikhim.com" href="mailto:JLeikhim@Leikhim.com">JLeikhim@Leikhim.com</a><br>>> 407-982-0446<br>>> WWW.LEIKHIM.COM<br>>><br>>><br>><br>><br>> --<br>> Skyler Fennell<br>> amsatnet.info<br>> KD?WHB<br>> <a ymailto="mailto:electricity440@gmail.com" href="mailto:electricity440@gmail.com">electricity440@gmail.com</a><br>><br>> _______________________________________________<br>> App_rpt-users mailing list<br>> <a ymailto="mailto:App_rpt-users@ohnosec.org" href="mailto:App_rpt-users@ohnosec.org">App_rpt-users@ohnosec.org</a><br>> <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br>><br>> To unsubscribe from this list please visit<br>> <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users </a>and scroll down<br>> to the bottom of the page. Enter your email address and press the<br>> "Unsubscribe or edit options button"<br>> You do not need a password to unsubscribe, you can do it via email<br>> confirmation. If you have trouble unsubscribing, please send a message to<br>> the list detailing the problem.<br>><br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://ohnosec.org/pipermail/app_rpt-users/attachments/20160402/bd80bec4/attachment-0001.html" target="_blank">http://ohnosec.org/pipermail/app_rpt-users/attachments/20160402/bd80bec4/attachment-0001.html</a>><br><br>------------------------------<br><br>Message: 2<br>Date: Sat, 02 Apr 2016 21:07:42 -0400<br>From: "Michael J. Wolthuis" <<a ymailto="mailto:wolthuis@gmail.com" href="mailto:wolthuis@gmail.com">wolthuis@gmail.com</a>><br>To: "<a ymailto="mailto:app_rpt-users@ohnosec.org" href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a>" <<a ymailto="mailto:app_rpt-users@ohnosec.org" href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</a>><br>Subject: [App_rpt-users] How to add chan_rtpdir.c to DIAL<br>Message-ID: <<a ymailto="mailto:0426FF03-B422-471B-A684-7F9BF8307E2B@gmail.com" href="mailto:0426FF03-B422-471B-A684-7F9BF8307E2B@gmail.com">0426FF03-B422-471B-A684-7F9BF8307E2B@gmail.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>I am finally replacing a very old install of ACID at a HUB site with DIAL.<br><br>This site does have some ties though to rtpDir_tm which is older, but still fun and working?<br><br>I can?t seem to get chan_rtpdir.c to compile into Asterisk. I put it in the channels folder and recompiled, but it acts like it didn?t add it / compile it in.<br><br>[Apr 2 21:02:37] NOTICE[1305] app_rpt.c: Normal Repeater Init 2363 <br><br>[Apr 2 21:02:37] NOTICE[1305] app_rpt.c: Normal Repeater Init 1000 <br><br>[Apr 2 21:02:37] WARNING[1318] channel.c: No channel type registered for 'rtpdir'<br><br>[Apr 2 21:02:38] WARNING[1305] app_rpt.c: rpt_thread restarted on node 2363<br><br>[Apr 2 21:02:38] WARNING[1305] app_rpt.c: rpt_thread restarted on node 1000<br><br>[Apr 2 21:02:38] WARNING[1322] channel.c: No channel type registered for 'rtpdir'<br><br>[Apr 2 21:02:40] NOTICE[1305] app_rpt.c: RPT thread restarted on 2363<br><br>[Apr 2 21:02:40] WARNING[1305] app_rpt.c: rpt_thread restarted on node 2363<br><br>[Apr 2 21:02:40] NOTICE[1305] app_rpt.c: RPT thread restarted on 1000<br><br>[Apr 2 21:02:40] WARNING[1305] app_rpt.c: rpt_thread restarted on node 1000<br><br><br><br>Anyone have any suggestions?<br>Mike<br>kb8zgl<br><br><br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://ohnosec.org/pipermail/app_rpt-users/attachments/20160402/31e04fc1/attachment.html" target="_blank">http://ohnosec.org/pipermail/app_rpt-users/attachments/20160402/31e04fc1/attachment.html</a>><br><br>------------------------------<br><br>_______________________________________________<br>App_rpt-users mailing list<br><a ymailto="mailto:App_rpt-users@ohnosec.org" href="mailto:App_rpt-users@ohnosec.org">App_rpt-users@ohnosec.org</a><br><a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br><br><br>End of App_rpt-users Digest, Vol 86, Issue 5<br>********************************************<br><br><br></div> </div> </div> </div></div></body></html>