BUDDIPOLE IN THE FIELD

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17m vertical with 4 radials Far field plot for 17m with 4 radials Figure 26 17m vertical antenna with 4 radials 17m vertical with 16 radials Far field plot for 17m with 16 radials Figure 27 17m vertical antenna with 16 radials 69
Perfect ground Saltwater Figure 28 17m antenna deployed over perfect ground and saltwater Consider the comparison of 20m antennas shown in Figure 29. The horizontal dipole is constructed from standard Buddipole parts using standard whips. The vertical antenna uses four arms and a long (9.5 foot) whip as the vertical element, and four wires for elevated radials. The vertical antenna is deployed at 5 feet. At the 20 degree elevation, the horizontal dipole has a gain of -3.13 dBi compared with the vertical’s 0.01 dBi gain. And, remember, this 0.01 dBi One of the best accessories you can pack in your Buddipole bag is an extra pair of arms. They are very strong and enable the construction of full size antennas up to 20m with a 9.5 foot whip. Further, as later sections in the book will show, every inch of radiator in a shortened vertical antenna improves efficiency. You get that extra length with extra arms. figure for the vertical is over “average” ground. If we move it over saltwater it gets much better! (The dipole must be placed over “perfect” ground to come close to the gain the vertical has over “average” ground.) Just to put things into perspective, the vertical gives you a half an S-unit more power than the equivalent horizontal dipole over average ground, and more than an S-unit improvement near the beach. Add to these facts that the vertical is easier to construct and tune, faster to set up, and more stable in high winds than the horizontal dipole. The vertical configuration (with 2 or more radials) is a clear winner when the Buddipole is ground mounted. 70
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BUDDIPOLE IN THE FIELD by B. Scott
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Buddipole in the Field Published b
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Foreword Back in early 2000 a self-
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Preface When the term ham radio sta
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Acknowledgements The danger of one
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How to use this book Though the Bud
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Table of Contents 1 THE BUDDIPOLE
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all—though this book will cover m
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7 Buddipole on the Beach Beaches bo
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A note to Buddistick users The Budd
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The VersaTee is the heart of the Bu
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All these pieces come together to c
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proper turn of the wire, orient the
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All of the discussions above are fo
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The Mast Guying Kit consists of thr
Page 33 and 34: picnic table with a clamp securing
Page 35 and 36: Extra coil clips are strong and bri
Page 37 and 38: If using the 16 foot mast, insert t
Page 39 and 40: expects to see a 50 ohm load to an
Page 41 and 42: Power ratio dB Power ratio dB 1.25:
Page 43 and 44: Consider an antenna that is 1% effi
Page 45 and 46: An alternative is to use precise ma
Page 47 and 48: factors. How will such compromises
Page 49 and 50: directions we care about. That is,
Page 51 and 52: details, including the important co
Page 53 and 54: Figure 13 Elevation plot for a Budd
Page 56 and 57: 5 Balconies and Rooftops The Buddip
Page 58 and 59: BASIC DIPOLE TUNING WITH 9.5 FOOT W
Page 60 and 61: shows (from left to right) a whip,
Page 62 and 63: 10m elevation plot at 16 feet 10m e
Page 74: Other configurations for this anten
Page 77 and 78: 180 degrees Vertical dipole 170 deg
Page 79 and 80: Antenna deployment Far field elevat
Page 81 and 82: the dipole. However, as soon as we
Page 83: 17m vertical with 2 radials Far fie
Page 87 and 88: The table above may not be the fina
Page 89 and 90: Buddipole configurations cannot eas
Page 91 and 92: impedance values are complex number
Page 93 and 94: Buddipole Ground Mounted Verticals
Page 95 and 96: terminated with a ring connector, a
Page 97 and 98: The downward sloping wire radials r
Page 99 and 100: Standard Buddipole with coil Option
Page 101 and 102: The antenna is short for a 15m ante
Page 103 and 104: Standard Buddipole Long whip Vertic
Page 105 and 106: SWR plot for shortened vertical Far
Page 107 and 108: Just replacing the 5.5' whip with t
Page 109 and 110: 40m vertical A 40m vertical antenna
Page 111 and 112: Standard Buddipole 4x arms 9.5' whi
Page 113 and 114: An elevated vertical monopole with
Page 115 and 116: 12m Far field plot for 12m antenna
Page 117 and 118: 30m Far field plot for 30m antenna
Page 119 and 120: 104 Clamp Mounting plate Typical de
Page 121 and 122: Buddistick Cookbook All Buddistick
Page 123 and 124: 12m Buddistick The Buddistick shoul
Page 125 and 126: 17m Buddistick The Buddistick shoul
Page 127 and 128: 20m Buddistick SWR 20m Buddistick f
Page 129 and 130: Figure 51 Buddipole 6m two element
Page 131 and 132: Figure 54 SWR plot for Buddipole 6m
Page 133 and 134: The whips connected to the VersaTee
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2m three element Yagi A 3 element Y
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10m 2 element Yagi The 10m two elem
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12m 2 element Yagi The 12m Yagi is
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126
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Table 11 shows configuration option
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SWR for 80m antenna with 16 radials
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Antenna setup from Buddipole Low Ba
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system and the 2 radial system is i
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60m The 60m band consists of five c
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SWR plot for 60m vertical Far field
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140
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focus on what was important, and wh
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144
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Appendix B Buddipole Low Band Coil
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Appendix D NCDXF beacon transmit ti
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BNC BUG CC CWA dB Connector type Li
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References ARRL. More Wire Antenna
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In passing Many books and articles
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BUDDIPOLE IN THE FIELD

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