tag:blogger.com,1999:blog-38415134183929070602026-03-12T03:32:30.650+05:30VU2IVVLets Get Radio ActiveVU2IVV Jayesh Banatwalahttp://www.blogger.com/profile/08110660191843195991noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-3841513418392907060.post-19568478121383401112010-08-16T23:18:00.042+05:302017-06-15T16:38:04.579+05:30<div dir="ltr" style="text-align: left;" trbidi="on">
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<strong><span style="font-size: 180%;">Vertical Dipole Antenna<br />For Amateur Radio<br />VHF 2Mtr (144.000 to 146.000)<br />Construct your Vertical Dipole</span></strong></div>
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Requirements :-<br />
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1) Copper or Aluminum Tube or solid Rod Or Telescopic Wipes<br />
2) Mast PVC</div>
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Hi friend I have homebrewed one vertical dipole for myself &Would like to share it with everyone , This project is very Cheap and easy to home brew with excellent result, I have make Use of telescopic wipes supplied along with Television set .Also These wipes are available in the market.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilzuOigpy9wuC8z0iFt8-S0jKCW3cSAJl4lrhikE4z5yokCwoWeaIWvgi9nu58tpPk7cG4afc0OC6vcnRLEZsZrvZuAT_UPHaiVHqYBADdbgiXGoApZbkubLruhlHuLEzs_Fu7Ur-5r0re/s1600/vu2ivv+1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" fea="true" height="171" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilzuOigpy9wuC8z0iFt8-S0jKCW3cSAJl4lrhikE4z5yokCwoWeaIWvgi9nu58tpPk7cG4afc0OC6vcnRLEZsZrvZuAT_UPHaiVHqYBADdbgiXGoApZbkubLruhlHuLEzs_Fu7Ur-5r0re/s400/vu2ivv+1.JPG" width="400" /></a></div>
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<span style="font-size: 130%;"> <span style="font-size: small;">Dipole is an antenna that can be made by a simple wire, with a center-fed driven element for transmitting or receiving radio frequency. These antennas are the simplest practical antennas.</span></span><span style="font-size: 130%;"></span></div>
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<span style="font-size: small;">The dipole can be mounted horizontal but then the Radiation Pattern will be Directional.</span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYcXJsvhqLqLLlcPVpEyuwBwnW4pSoOXIpyokUCjVmis3nI3C0c8pIzx5usEJhlMXguf72TxgG5TaE79bdYdTqfMU5ZW2-nRzqu4bPxRaBlQhw0tOCTMi_9NkwOzZNCb7YIi6MlKkxIJdf/s1600/vu2ivv-hori-verti.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" fea="true" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjYcXJsvhqLqLLlcPVpEyuwBwnW4pSoOXIpyokUCjVmis3nI3C0c8pIzx5usEJhlMXguf72TxgG5TaE79bdYdTqfMU5ZW2-nRzqu4bPxRaBlQhw0tOCTMi_9NkwOzZNCb7YIi6MlKkxIJdf/s400/vu2ivv-hori-verti.JPG" width="340" /></a></div>
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If the radials are North South then the Radiation pattern will be East West .<br />
Vertically mounted Antenna will radiate in Omni direction.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEic5ibUQcTbC_AmJWOdsjvfDVJkaRvHyUIOHPe4FWHl0-_LmKQ68oyfs8my_hCQRxSyiW7XpT88t0hj3wIHNELPGg4RNuZ3FdvYQgAZAZXfnSWijbBvPG20NHOBF0K6EOI7dYAFwKjZxnY4/s1600/vu2ivvantenna.jpg" imageanchor="1" style="clear: left; cssfloat: left; float: left; height: 394px; margin-bottom: 1em; margin-right: 1em; width: 420px;"><img border="0" fea="true" height="389" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEic5ibUQcTbC_AmJWOdsjvfDVJkaRvHyUIOHPe4FWHl0-_LmKQ68oyfs8my_hCQRxSyiW7XpT88t0hj3wIHNELPGg4RNuZ3FdvYQgAZAZXfnSWijbBvPG20NHOBF0K6EOI7dYAFwKjZxnY4/s400/vu2ivvantenna.jpg" width="400" /></a></div>
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This is my vertical Dipole have installed at my QTH for 2 Mtr</div>
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As both the radials are in a vertical Position , so it’s radiating Omni directional , currently using with my ICOM F-310(25watt), Mast is 1” PVC pipe , Feed line I have used is LMR 400 to my Rig , (very low loss cable ) Even with QRP 100 Mille watts its possible to trigger MATHERAN Repeater distance is approx. 50 KM & MUMBAI repeater 23 KM away from My QTH in Vile Parle,</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMpqL_47Z8jXxHLllVwYRhwNCsrmSBKQI6jMfQW4ZwfftJiuZI8SAY5wKE6y0f7sdFtdfZA4k4hAeM4Wr5geHXjI7EIjj1AXQeZ0mxa8H-FwlXKwNbaRVjbXbZfLsmQmTlLMMGz2NXC_pg/s1600/vu2ivv2.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" fea="true" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMpqL_47Z8jXxHLllVwYRhwNCsrmSBKQI6jMfQW4ZwfftJiuZI8SAY5wKE6y0f7sdFtdfZA4k4hAeM4Wr5geHXjI7EIjj1AXQeZ0mxa8H-FwlXKwNbaRVjbXbZfLsmQmTlLMMGz2NXC_pg/s320/vu2ivv2.jpg" width="276" /></a></div>
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To calculate the length of the wipes the formula is<br />
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Length of the Wipe = 468 / FRQ In Mhz<br />
Length of the Wipe = 468 / 145.000<br />
Total Length of the Wipe = 3.22 Feet<br />
Length of one arm is 3.22 / 2 = 1.6137 Feet or 19.32 Inches<br />
I have used Telescope wipes as it is easy to tune the antenna, Once you perfectly tune the antenna , you even can use aluminum or copper tube of the same length for the radials,</div>
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The SWR reading on 144.000 Mhz 1:1.2 (20 watt)<br />
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The SWR reading on 145.000 Mhz 1:1 (20 Watt)<br />
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The SWR reading on 146.000 Mhz 1:1 (20 Watt)<br />
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I am very much thankful to Team MARI to give me this wonderful idea & support in this project,<br />
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HAPPY HAMMING<br />
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73…………<br />
DE JAYESH (…- ..- ..--- .. …- …-)<br />
Email :-vu2ivv@mari-hams.org.in <a href="http://qrz.com/db/vu2ivv">http://qrz.com/db/vu2ivv</a><br />
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VU2IVV Jayesh Banatwalahttp://www.blogger.com/profile/08110660191843195991noreply@blogger.com