mirror of https://github.com/antenna2/cebik.git
188 lines
7.2 KiB
HTML
188 lines
7.2 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<meta charset="UTF-8">
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<meta name="keywords" content="LPDA, HF Multi Band">
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<title>A 3.5 Octave LPDA of High Potential Performance Part 2: Performance Graphics</title>
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<link rel="stylesheet" href="../styles.css">
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</head>
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<body>
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<h1><img src="../images/lpda.gif" align="left" width="150" height="83" border="2" vspace="5" hspace="10"><img src="../images/w4rnlwwr.gif" align="right" width="99" height="83" border="2" vspace="5" hspace="10">A 3.5 Octave LPDA of High Potential Performance<br>
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Part 2: But an Antenna that No One Will Build</h1>
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</center>
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<center>
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<b>A Gallery of Performance Graphics</b>
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</center>
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<center>
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<h3>L. B. Cebik, W4RNL</h3>
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</center><br>
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<br>
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<center>
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<img src="../images/colorbar.gif" align="middle" width="540" height="4">
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</center><br>
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<br>
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<p>The following graphics show the free-space azimuth patterns and the relative current magnitudes for the two designs discussed in the linked note. The "60-Element" design provides patterns for all bands, while the "64-Element" design shows patterns only for the uppermost bands--where the graphics differ from those of the 60-Element design.</p>
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<p>Among other things, one might well note the rear azimuth patterns for all of the frequencies checked. Perhaps more important, note the number of active elements for each band and the relationship (on the uppermost bands) of the antenna performance to the number of active elements forward of the one with the highest relative current magnitude.</p>
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<h3>60-Element LPDA</h3>
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<p>3 MHz:</p>
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<center>
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<img src="lp-3p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-3c.gif" width="633" height="395" border="2" vspace="5" hspace="9">
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</center>
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<p>3.5 MHz:</p>
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<center>
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<img src="lp-35p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-35c.gif" width="631" height="387" border="2" vspace="5" hspace="9">
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</center>
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<p>4 MHz:</p>
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<center>
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<img src="lp-4p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-4c.gif" width="630" height="381" border="2" vspace="5" hspace="9">
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</center>
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<p>7.15 MHz:</p>
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<center>
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<img src="lp-7p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-7c.gif" width="631" height="393" border="2" vspace="5" hspace="9">
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</center>
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<p>10.125 MHz:</p>
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<center>
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<img src="lp-10p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-10c.gif" width="630" height="396" border="2" vspace="5" hspace="9">
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</center>
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<p>14.175 MHz:</p>
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<center>
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<img src="lp-14p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-14c.gif" width="632" height="398" border="2" vspace="5" hspace="9">
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</center>
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<p>18.118 MHz:</p>
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<center>
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<img src="lp-181p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-181c.gif" width="635" height="390" border="2" vspace="5" hspace="9">
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</center>
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<p>21.225 MHz:</p>
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<center>
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<img src="lp-212p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-212c.gif" width="631" height="393" border="2" vspace="5" hspace="9">
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</center>
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<p>24.94 MHz:</p>
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<center>
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<img src="lp-249p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-249c.gif" width="630" height="392" border="2" vspace="5" hspace="9">
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</center>
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<p>28 MHz:</p>
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<center>
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<img src="lp-280p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-280c.gif" width="639" height="391" border="2" vspace="5" hspace="9">
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</center>
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<p>28.5 MHz:</p>
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<center>
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<img src="lp-285p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-285c.gif" width="631" height="391" border="2" vspace="5" hspace="9">
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</center>
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<p>29 MHz:</p>
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<center>
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<img src="lp-290p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-290c.gif" width="629" height="378" border="2" vspace="5" hspace="9">
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</center>
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<p>29.5 MHz:</p>
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<center>
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<img src="lp-295p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-295c.gif" width="631" height="386" border="2" vspace="5" hspace="9">
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</center>
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<p>30 MHz:</p>
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<center>
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<img src="lp-30p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-30c.gif" width="631" height="392" border="2" vspace="5" hspace="9">
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</center>
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<h3>64-Element LPDA</h3>
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<p>21.225 MHz:</p>
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<center>
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<img src="lp-421p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-421c.gif" width="632" height="388" border="2" vspace="5" hspace="9">
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</center>
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<p>24.94 MHz:</p>
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<center>
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<img src="lp-4249p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-4249c.gif" width="632" height="381" border="2" vspace="5" hspace="9">
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</center>
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<p>28 MHz:</p>
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<center>
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<img src="lp-428p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-428c.gif" width="634" height="395" border="2" vspace="5" hspace="9">
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</center>
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<p>28.5 MHz:</p>
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<center>
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<img src="lp-4285p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-4285c.gif" width="633" height="383" border="2" vspace="5" hspace="9">
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</center>
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<p>29 MHz:</p>
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<center>
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<img src="lp-429p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-429c.gif" width="633" height="387" border="2" vspace="5" hspace="9">
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</center>
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<p>29.5 MHz:</p>
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<center>
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<img src="lp-4295p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-4295c.gif" width="631" height="388" border="2" vspace="5" hspace="9">
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</center>
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<p>30 MHz:</p>
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<center>
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<img src="lp-430p.gif" width="640" height="350" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="lp-430c.gif" width="632" height="381" border="2" vspace="5" hspace="9">
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</center>
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<center>
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<img src="../images/colorbar.gif" align="middle" width="540" height="4">
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</center>
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<p><i>Updated 04-14-2000. © L. B. Cebik, W4RNL. Data may be used for personal purposes, but may not be reproduced for publication in print or any other medium without permission of the author.</i></p>
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<center>
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<img src="../images/colorbar.gif" align="middle" width="540" height="4">
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</center>
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<p><a href="lp60.html"><img src="../images/rtnhome.gif" align="bottom" width="40" height="40"> Return to LPDA Discussion Page</a></p>
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<p><a href="../radio.html"><img src="../images/return.gif" align="bottom" width="40" height="40"> Go to Index</a></p>
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<p class="topics-footer">Topics: <a href='../topics.html#hf-multi-band'>HF Multi Band</a>, <a href='../topics.html#lpda'>LPDA</a></p><br>
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</body>
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</html>
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