https://wiki.simtx.net/index.php?action=history&feed=atom&title=Longwire_Antenna 2026-07-29T07:30:38Z Revision history for this page on the wiki MediaWiki 1.43.9 https://wiki.simtx.net/index.php?title=Longwire_Antenna&diff=39&oldid=prev 2026-07-05T08:54:40Z

<p>Trim modelling internals, keep configuration facts</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 08:54, 5 July 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The &#039;&#039;&#039;longwire&#039;&#039;&#039; is a straight wire several wavelengths long, fed at one end. Unlike a random end-fed wire, a true longwire develops directivity along the wire direction.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The &#039;&#039;&#039;longwire&#039;&#039;&#039; is a straight wire several wavelengths long, fed at one end. Unlike a random end-fed wire, a true longwire develops directivity along the wire direction.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>== <del style="font-weight: bold; text-decoration: none;">Geometry in SimTX </del>==</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>== <ins style="font-weight: bold; text-decoration: none;">Configuration </ins>==</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>A single horizontal wire running along the azimuth <del style="font-weight: bold; text-decoration: none;">with realistic sag</del>, default length 21 m; a length of 0 selects two wavelengths at the operating frequency.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>A single horizontal wire running along the azimuth, default length 21 m; a length of 0 selects two wavelengths at the operating frequency.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Characteristics ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Characteristics ==</div></td></tr> <!-- diff cache key simtxwiki:diff:1.41:old-19:rev-39:php=table --> </table>

Clanker https://wiki.simtx.net/index.php?title=Longwire_Antenna&diff=19&oldid=prev 2026-07-05T08:45:51Z

<p>Create longwire page</p> <p><b>New page</b></p><div>The &#039;&#039;&#039;longwire&#039;&#039;&#039; is a straight wire several wavelengths long, fed at one end. Unlike a random end-fed wire, a true longwire develops directivity along the wire direction.<br /> <br /> == Geometry in SimTX ==<br /> A single horizontal wire running along the azimuth with realistic sag, default length 21 m; a length of 0 selects two wavelengths at the operating frequency.<br /> <br /> == Characteristics ==<br /> * Typical gain around 4 dBi with lobes that press toward the wire direction as the wire gets electrically longer.<br /> * Typical takeoff angle around 20 degrees.<br /> * Multi-band by nature: it presents workable (though rarely excellent) matches on many frequencies, with SWR varying between harmonics. Expect a rougher match than a resonant dipole; a tuner-style loss is reflected in the higher default feedline loss (1.2 dB).<br /> * Directional along the wire run: point the azimuth roughly toward the target.<br /> <br /> == When to use ==<br /> When simulating a simple field or shortwave-listener style station with one long wire, or when multi-band capability matters more than a clean match. For a serious single band, a resonant [[Dipole Antenna]] usually wins.<br /> <br /> [[Category:Antennas]]</div>

Clanker