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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Good stuff….<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The goal is to figure out if these foldable flat antennas have better performance over the stock duck or aftermarket verticals…<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It would be interesting to see the actual pattern however.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>..Max<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> HiDARG-Members [mailto:hidarg-members-bounces@hidarg.org] <b>On Behalf Of </b>Doug Miller<br><b>Sent:</b> Saturday, July 13, 2019 08:18<br><b>To:</b> HiDARG Members<br><b>Subject:</b> Re: [HiDARG-MEMBERS] Folding HT antenna<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal> It’s probably obvious, but instead of taking measurements around a circular path, an alternative is to rotate the antenna And record field strength with each antenna orientation. I’ve done this before with a tripod using 10 or 15 degree increments. This is easy to set up and execute, and also helps eliminate the influences of terrain and surrounding objects. <o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> With these types of tests in the military and aerospace environment I’ve seen labs typically trying to ensure they are taking measurements at least 3 to 5 times the Fraunhofer distance, which is considered the boundary of the radiating near field. For a typical 2 meter antenna this is much less than 100 feet. <o:p></o:p></p><div><p class=MsoNormal><a href="https://en.m.wikipedia.org/wiki/Fraunhofer_distance">https://en.m.wikipedia.org/wiki/Fraunhofer_distance</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Doug<o:p></o:p></p></div><div><p class=MsoNormal>W7ZV<o:p></o:p></p></div><div><p class=MsoNormal>Sisters<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Sat, Jul 13, 2019 at 7:59 AM Max Vaughan bb <<a href="mailto:maxv@bendbroadband.com">maxv@bendbroadband.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Extracted from various sources….</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>You should not need more than 100ft circle with no nearby metal or reflective surfaces.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Normally used to determine antenna directional patterns, in an ideal setting.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Walk around the circle get various readings, and draw on grid paper…. that gives you the pattern.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>But that is not what you’re doing here…. your comparing signal strength over a set distance.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Actual distance is less important than getting a relative reading at a set distance and comparing that same </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>exact setting and reading with the same power and a different antenna, again the number you get is not important</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>the difference in the reading from the same exact positon of the units being held and their settings etc is what you are after.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Any change in the sensitivity controls between one antenna and another will not be valid.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Use the sensitivity control to adjust the reading to get at least half scale, if too far away then get closer….</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Once set don’t change sensitivity while comparing….</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Also how close a person is to the transmitter, and meter is important as well.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Don’t change the way you hold each unit between each antenna your testing.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Arms length, straight out away from body is easier to do and track.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Distance from body and height above ground should be keep the same between antennas.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Don’t change who holds radio and transmits and who is holding meter between antennas under test.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ideally, you would want a tripod to hold the antenna, and an extension cable to the HT, and the operator</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>opposite the FS meter side.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>IE the goal is to minimize all variables between two antennas you are comparing.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you want to test the actual pattern of an antenna, you have to have a set circle.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Transmitter / antenna can’t move position, FS meter rotates around the circle at various points logging reading.</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> HiDARG-Members [mailto:<a href="mailto:hidarg-members-bounces@hidarg.org" target="_blank">hidarg-members-bounces@hidarg.org</a>] <b>On Behalf Of </b>Mike Williams<br><b>Sent:</b> Saturday, July 13, 2019 00:31<br><b>To:</b> HiDARG Members<br><b>Subject:</b> Re: [HiDARG-MEMBERS] Folding HT antenna</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I wonder if any articles in QST or that experimenters journal about antenna testing this way?<o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Fri, Jul 12, 2019, 11:27 PM Jeff Moore <<a href="mailto:tnetcenter@gmail.com" target="_blank">tnetcenter@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I think an area like a football or soccer field would work great for this or a large open park. 100 feet may not be far enough to get good readings. A 5 watt HT can throw out a signal that can reach miles depending on terrain. I'm pretty certain at this point that 10 or 20 feet is way too close! 100 - 300 ft may even be too close. We'll have to try it out and see what we get. Like I said before "play with our radios"!<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Jeff Moore -- KE7ACY<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Fri, Jul 12, 2019 at 11:01 PM Mike Williams <<a href="mailto:kb7klt@gmail.com" target="_blank">kb7klt@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Ya.. I've been camping and doing more for a bit..then I'll be around to try that...The weekend of the 20th and the 27th looks good too...<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>How big an area would we need? 5/10 acre grass fields? bigger? dunno <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>de Mike KB7KLT<o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Fri, Jul 12, 2019, 7:38 PM Jeff Moore <<a href="mailto:tnetcenter@gmail.com" target="_blank">tnetcenter@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I don't know how "scientific" any of this will be but I will document it as best I can and share that with everyone.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hey Joe Barry, you want to bring your antenna analyzer down and play with us???<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Jeff Moore -- KE7ACY<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Fri, Jul 12, 2019 at 7:31 PM Steven Fletcher <<a href="mailto:srfletcher@gmail.com" target="_blank">srfletcher@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Jeff<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I'd love to see this documented even if the science of it is not perfect.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>It is something I have thought of doing<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>BTW last night on our <b>UHF </b>simplex net (446.575) I did a shoot out between the $20 guaranteed for life antenna and the $10 titanium Chinese antenna<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>the $10 antenna won <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>not scientific but somewhat indicative<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>steve<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div id="m_-421654919726930311m_-3881267133915517461gmail-m_-555942497581660621m_-6512702962354093815gmail-m_7380669946141756119signature_old"><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'> </span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'> </span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'>Steve Fletcher</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'>Phone: 541-699-1909</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'>Grant County ARES Emergency Coordinator</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'>K7AA </span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Tahoma","sans-serif"'><a href="http://drawingforth.org" target="_blank"><span style='font-family:"Arial","sans-serif"'>My Blog</span></a></span><span style='font-family:"Arial","sans-serif"'> </span><o:p></o:p></p></div></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Arial","sans-serif"'> </span><o:p></o:p></p></div></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>------ Original Message ------<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>From: "Jeff Moore" <<a href="mailto:tnetcenter@gmail.com" target="_blank">tnetcenter@gmail.com</a>><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>To: "HiDARG Members" <<a href="mailto:hidarg-members@hidarg.org" target="_blank">hidarg-members@hidarg.org</a>><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Sent: 7/12/2019 7:19:41 PM<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Subject: Re: [HiDARG-MEMBERS] Folding HT antenna<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div id="m_-421654919726930311m_-3881267133915517461gmail-m_-555942497581660621m_-6512702962354093815gmail-m_7380669946141756119xb871bdb848cb43c"><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi Mike,<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I got a digital field strength meter from Kent at the meeting last night - one of the QRPGuys kits. Playing around with it last night in my room was somewhat inconclusive - likely because I was way too close to get meaningful readings from it ( 10 feet). So I suspect that to do realistic tests I need at least 100 feet of separation between the ht/antenna and the meter. I'll need help to do it. It looks like I have access to a couple of other Field Strength meters (one a military surplus unit and one that looks like it could be homebrew with John Ogden's name on it). I have no idea if any of them actually work, the QRPGuys unit- seems to work but, I haven't tested the other two units. <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>So, do you want to get together with a bunch of HTs and antennas and see what we can figure out??? We can go to a local park (open the invitation to the entire club) and set up an ad hoc antenna test range and play radio! Or . . . .?<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Jeff Moore -- KE7ACY<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Fri, Jul 12, 2019 at 1:31 PM Mike Williams <<a href="mailto:kb7klt@gmail.com" target="_blank">kb7klt@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I would be interested in comparing my cushcraft 4-ele too...also have other homebrews to look at.<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>de Mike KB7KLT<o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>On Wed, Jul 10, 2019 at 3:38 PM Jeff Moore <<a href="mailto:tnetcenter@gmail.com" target="_blank">tnetcenter@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hi Everyone,<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I figured there would be some interest in this antenna. I have the 28.3-inch version, there is one longer version and two shorter versions. Note that the ad on Amazon also includes a couple of different length extension cables, so be sure you're ordering the antenna not one of the cables(unless you want one fo the cables:-)! <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I'm still testing this antenna, but so far it's at least as good as the antennas I have and I think the longer (42-inch) version will work really well with a GO BOX that has VHF/UHF capability. It's also available with both a female SMA connector and a male SMA connector so it will fit on a lot of radios (provided you get the correct connector).<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Anyway, for the price - hard to beat!!! here's the link:<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><a href="https://www.amazon.com/gp/product/B07RRPC8VQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1" target="_blank">https://www.amazon.com/gp/product/B07RRPC8VQ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1</a><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>These are ham band antennas so be aware that they will probably not work very well outside the bands - I noted a reviewer who was complaining that the antenna didn't seem to work at 150 MHz or 466MHz (both outside the ham bands). Testing these antennas (or most HT antennas) with an antenna analyzer can be tricky since the chassis of the ht is often used as a pseudo-ground-plane and inserting the analyzer between the antenna and the radio may not give you a good reading. A better testing method is to use a field strength meter at a set distance from the antenna/radio being tested.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Does anyone have a field strength meter??? We could set up a quick and dirty antenna test range that would reveal just how effective a particular antenna is based on actual RF output! I've heard that the results of such testing can be very revealing. <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Enjoy!!!<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>7 3<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Jeff Moore -- KE7ACY<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_______________________________________________<br>HiDARG-Members mailing list<br><a href="mailto:HiDARG-Members@hidarg.org" target="_blank">HiDARG-Members@hidarg.org</a><br><a href="http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org" target="_blank">http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org</a><o:p></o:p></p></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_______________________________________________<br>HiDARG-Members mailing list<br><a href="mailto:HiDARG-Members@hidarg.org" target="_blank">HiDARG-Members@hidarg.org</a><br><a href="http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org" target="_blank">http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org</a><o:p></o:p></p></blockquote></div></blockquote></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_______________________________________________<br>HiDARG-Members mailing list<br><a href="mailto:HiDARG-Members@hidarg.org" target="_blank">HiDARG-Members@hidarg.org</a><br><a href="http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org" target="_blank">http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org</a><o:p></o:p></p></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_______________________________________________<br>HiDARG-Members mailing list<br><a href="mailto:HiDARG-Members@hidarg.org" target="_blank">HiDARG-Members@hidarg.org</a><br><a href="http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org" target="_blank">http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org</a><o:p></o:p></p></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_______________________________________________<br>HiDARG-Members mailing list<br><a href="mailto:HiDARG-Members@hidarg.org" target="_blank">HiDARG-Members@hidarg.org</a><br><a href="http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org" target="_blank">http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org</a><o:p></o:p></p></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>_______________________________________________<br>HiDARG-Members mailing list<br><a href="mailto:HiDARG-Members@hidarg.org" target="_blank">HiDARG-Members@hidarg.org</a><br><a href="http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org" target="_blank">http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org</a><o:p></o:p></p></blockquote></div></div></div><p class=MsoNormal>_______________________________________________<br>HiDARG-Members mailing list<br><a href="mailto:HiDARG-Members@hidarg.org" target="_blank">HiDARG-Members@hidarg.org</a><br><a href="http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org" target="_blank">http://hidarg.org/mailman/listinfo/hidarg-members_hidarg.org</a><o:p></o:p></p></blockquote></div></div><p class=MsoNormal>-- <o:p></o:p></p><div><div><div><p class=MsoNormal>DOUG MILLER<br><a href="mailto:dougmiller72@gmail.com" target="_blank">dougmiller72@gmail.com</a><o:p></o:p></p></div></div></div></div></body></html>