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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Once I get my HF sorted I would be interested in running it more often <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Andrew <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> OZAPRS [mailto:ozaprs-bounces@aprs.net.au] <b>On Behalf Of </b>Gerard Hill<br><b>Sent:</b> Sunday, 3 December 2017 11:08 PM<br><b>To:</b> Australian APRS Users <ozaprs@aprs.net.au><br><b>Subject:</b> Re: [OZAPRS] Fw: 40M APRS frequencies<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Good to see two more gateways!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Josh, the adjustment to the audio may have been the critical breakthrough. The main thing is to make sure everything is linear - no distortion on the audio or overdriving of the transmitter.<o:p></o:p></p></div><div><p class=MsoNormal>Propagation has played its part too. During the day time, VK4VP-4 and VK3OA-4 would be difficult to reach in summer on 40m - they are over 800km away.<o:p></o:p></p></div><div><p class=MsoNormal>This afternoon there has been an E-layer present which may have assisted propagation to my IGate, or it may just have been ground wave. We won't know while the E-layer is present.<o:p></o:p></p></div><div><p class=MsoNormal>Anyway, impressive result!<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Cheers,<o:p></o:p></p></div><div><p class=MsoNormal>Gerard - VK2IO<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 3 December 2017 at 21:46, Glen English VK1XX <<a href="mailto:glenlist@pacificmedia.com.au" target="_blank">glenlist@pacificmedia.com.au</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>actually I am a bit puzzled about why it started working when the sun went down.<br><br>I ran some simulations and predictions, and the only thing I can come up with is that there was some E layer blanketing and your antenna (or the receiver antenna) wouldnt support the low E layer propagation angles efficently...<br><br>otherwise, I dunno<span style='color:#888888'><br><br><span class=hoenzb>g</span></span><br><br><span class=im>On 3/12/2017 8:13 PM, Josh wrote:</span><o:p></o:p></p><div><div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>I'm not sure whether it was the very small adjustment I made to the TX<br>audio level or the setting of the sun, but I'm being heard now:<br>2017-12-03 18:41:43: VK2HFF-8>APDW15,VK3OA-4<br>2017-12-03 18:48:13: VK2HFF-8>APDW15,VK4VP-4<br>2017-12-03 18:54:44: VK2HFF-8>APDW15,VK3OA-4<br>2017-12-03 19:01:44: VK2HFF-8>APDW15,VK2IO-4<br><br><br><br>On 3/12/2017 7:30 PM, Josh wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>Hi Gavin,<br>That's what I was using initially, but my SBC's under-clocked CPU wasn't<br>coping too well with the extra load so I commented out the 7@30 decoders<br>to use the default 3@30Hz - and that is what caused the incorrect tone<br>pair to be selected.<br><br>- Josh VK2HFF<br><br><br>On 3/12/2017 7:00 PM, Gavin Rogers wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>On 3/12/2017 3:56 PM, Josh wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>Thanks Gerard.<br><br>I had a minor issue with direwolf using the wrong tones earlier, it<br>appears that<br>the config line "MODEM 300" will cause 1600 & 1800 tones to be used but<br>"MODEM 300 # [comment]" causes 1200 & 1800 Hz tones.<o:p></o:p></p></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'>Try using<br>MODEM 300 7@30<br><br>This will set up a number of modem frequency groups that'll help with<br>(mis)tuning:<br><br>Channel 0: 300 baud, AFSK 1600 & 1800 Hz, D, 48000 sample rate<br> 0.0: D 1510 & 1710<br> 0.1: D 1540 & 1740<br> 0.2: D 1570 & 1770<br> 0.3: D 1600 & 1800<br> 0.4: D 1630 & 1830<br> 0.5: D 1660 & 1860<br> 0.6: D 1690 & 1890<br><br>Fairly unlikely I'll get anything here on Perth on 40m on packet with my<br>antenna but I'm curious on the performance of Direwolf on HF so I'll<br>have my station listening for a few days.<br><br>73<br>Gavin<br>VK6HGR<o:p></o:p></p></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br>OZAPRS mailing list<br><a href="mailto:OZAPRS@aprs.net.au" target="_blank">OZAPRS@aprs.net.au</a><br><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><o:p></o:p></p></blockquote><p class=MsoNormal>_______________________________________________<br>OZAPRS mailing list<br><a href="mailto:OZAPRS@aprs.net.au" target="_blank">OZAPRS@aprs.net.au</a><br><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><o:p></o:p></p></blockquote><p class=MsoNormal><br><br>_______________________________________________<br>OZAPRS mailing list<br><a href="mailto:OZAPRS@aprs.net.au" target="_blank">OZAPRS@aprs.net.au</a><br><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs" target="_blank">http://lists.aprs.net.au/mailman/listinfo/ozaprs</a><o:p></o:p></p></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>