<div dir="ltr"><div>For a receive only situation, I think I would scrounge up an old scanner and have a completely separate receive setup. You can find cheap programmable scanners for just a few dollars. I keep several around for just such purposes.<br><br></div>Michael WA7SKG<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Oct 26, 2017 at 12:41 PM, spam8mybrain <span dir="ltr"><<a href="mailto:spam8mybrain@yahoo.com" target="_blank">spam8mybrain@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Ah, but what if DireWolf is one of the TNC's he wants to test? :-) It sounds like he wants to compare different TNC's audio processing.<div><br></div><div>Probably a larger issue here is if the TNC's being compared demand different audio levels. Adjusting the shared audio signal amplitude for best performance on one TNC might ruin the performance of the other TNC (signal lost in the noise or overloading and clipping/distorting in the TNC's analog input). If you really want to do this right, you might want to use an audio distribution amplifier with independently adjustable levels for each output feeding a TNC; incidentally, this would also eliminate all issues of loading down the input source.</div><div><br></div><div>Just my $.02.</div><div><br></div><div>Andrew, KA2DDO</div><div><div class="h5"><br><br>-------- Original message --------<br>From: "John D. Hays" <<a href="mailto:john@hays.org" target="_blank">john@hays.org</a>> <br>Date: 10/26/17 14:43 (GMT-05:00) <br>To: Max Harper <<a href="mailto:kg4pid@yahoo.com" target="_blank">kg4pid@yahoo.com</a>> <br>Cc: aprssig <<a href="mailto:aprssig@tapr.org" target="_blank">aprssig@tapr.org</a>> <br>Subject: Re: [aprssig] Multiple TNC's connected to one radio <br><br><div dir="ltr">It should work, but I can't vouch for specific TNCs.<div><br></div><div>Another approach would be to use Direwolf (<a href="https://github.com/wb2osz/direwolf" target="_blank">https://github.com/wb2osz/<wbr>direwolf</a>) which would give you more sampling opportunites.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Oct 26, 2017 at 9:21 AM, Max Harper <span dir="ltr"><<a href="mailto:kg4pid@yahoo.com" target="_blank">kg4pid@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:Courier New,courier,monaco,monospace,sans-serif;font-size:13px"><div id="m_6266834250169144174m_-3930541341492283968yui_3_16_0_ym19_1_1509030042854_4795" dir="ltr"> I would like to connect 2 tnc's to one radio. One would be transmitt/recieve and the other recieve only. This would be to test the decoding of a couple different tnc's. Am I likely to run into any problems connecting the speaker jack audio into 2 tnc's? Would the additional load cause me to have to readjust the audio level when I connect/disconnect the second tnc? My thoughts are since the speaker jack audio is low impedance (8 ohm) and the tnc input is much higher (hopefully) is that it will have little to no effect. </div><div id="m_6266834250169144174m_-3930541341492283968yui_3_16_0_ym19_1_1509030042854_4796"><br></div><div id="m_6266834250169144174m_-3930541341492283968yui_3_16_0_ym19_1_1509030042854_4797">Just thought I'd ask before wasting my time making a cable.</div><div id="m_6266834250169144174m_-3930541341492283968yui_3_16_0_ym19_1_1509030042854_4813"><br></div><div id="m_6266834250169144174m_-3930541341492283968yui_3_16_0_ym19_1_1509030042854_4798">Max KG4PID </div></div></div><br>______________________________<wbr>_________________<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="m_6266834250169144174gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><br><hr><div style="float:left;padding-left:1em"><font><font><font color="#0000ff">John D. Hays</font><br><font color="#000000">Edmonds, WA</font></font></font></div><div style="float:left;padding-left:1em;color:blue"><font><span style="color:rgb(128,128,128)"><font>K7VE</font></span></font><br><span style="color:rgb(128,128,128)"><font></font></span></div><div style="float:left;padding-left:1em;color:blue"><span style="color:rgb(128,128,128)"><br></span></div><div style="float:right;text-align:right"><div style="padding-top:0.5em"><img src="http://k7ve.org/images/Facebook-26.png" style="font-size:12.8px" id="m_62668342501691441741509046473246"> <img src="https://docs.google.com/uc?export=download&id=0B16WvG35kZ7SUFYwZldBMmJXeWs&revid=0B16WvG35kZ7STXlkYm1oMkpHYzVxOUlxVEtXc1dqMXZhdjZFPQ" style="font-size:12.8px" id="m_62668342501691441741509046473247"> <a href="http://k7ve.org/blog" target="_blank"><img src="http://k7ve.org/images/blog-icon-box-red-26.png" id="m_62668342501691441741509046473247"></a> <a href="http://twitter.com/#!/john_hays" target="_blank"><img src="http://k7ve.org/images/Twitter-26.png" id="m_62668342501691441741509046473248"></a></div><div style="padding-top:0.5em"><br></div></div></div></div></div></div></div></div></div></div></div></div>
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