tag:blogger.com,1999:blog-38415134183929070602024-02-08T05:43:38.440+05:30VU2IVVLets Get Radio ActiveVU2IVV Jayesh Banatwalahttp://www.blogger.com/profile/08110660191843195991noreply@blogger.comBlogger2125tag: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.comtag:blogger.com,1999:blog-3841513418392907060.post-68315768740061193232010-07-26T21:27:00.004+05:302012-08-29T14:56:11.962+05:30<div dir="ltr" style="text-align: left;" trbidi="on"><div align="center"><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><strong><span style="font-size: 180%;">Easy Eggbeater Antenna</span></strong></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><strong><span style="font-size: 180%;">For Amateur Radio to work with Satellite</span></strong></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><strong><span style="font-size: 180%;">VHF &UHF</span></strong></div></div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><strong><span style="font-size: 130%;"><em>Requirements :-</em></span></strong></div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;">1) Copper or Aluminum Tube or solid Rod (4 to 5mm)</div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;">2) Cable RG 58 ( 50 OHMS)</div><div align="left">3) Mast PVC</div><div align="left">4) PVC Base</div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;">5) Nut, bolt etc.</div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"> Eggbeater Antenna consist of two Loops , Both the loops are connected to each other with RG 58,(50 ohms) it should be quarter wave length , Solder outer shield at both the end and the center conductor connects to the loops as shown in the Fig.1 . The impedance of the phasing line is 100 ohms. So point 1, 2 and point 3, 4 is 50 ohms </div><div align="left" style="text-align: justify;"><br />
</div><div align="left"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnGEJTeyTwocuTZKJ1KpRTMvu4iqSZgfzn9l7OvXkSJc7SMyxUzhm0vt6llLAOzvAlsMFpOrfbNFxdCS2IXuy2TjjDlvOL2rOsl1mC2_6JVy41koFq-U38lnZLAU8N2RCSPtrrwsDPj4tS/s1600/vu2ivv6.jpg" imageanchor="1" style="height: 256px; margin-left: 1em; margin-right: 1em; width: 545px;"><img border="0" fea="true" height="161" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnGEJTeyTwocuTZKJ1KpRTMvu4iqSZgfzn9l7OvXkSJc7SMyxUzhm0vt6llLAOzvAlsMFpOrfbNFxdCS2IXuy2TjjDlvOL2rOsl1mC2_6JVy41koFq-U38lnZLAU8N2RCSPtrrwsDPj4tS/s400/vu2ivv6.jpg" width="400" /></a></div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><br />
</div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><strong><em>Measurement:-</em></strong><br />
Circumference for Each Loop Should be 215.28 CM For VHF<br />
Phasing Line should be 34.15 CM For VHF</div><div align="left" style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;"><br />
Circumference for Each Loop should be 75.90 CM For UHF<br />
Phasing Line should be 11.38 CM For UHF</div><div class="separator" style="clear: both; text-align: center;"></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; text-align: justify;"><br />
For better understanding The above Fig.1 show the loops are separated , Both the loops are full wave mounted at right angle to each other and coupled together and one inside another, Fig 4 shows about mounting these loops This antenna is omni directional circularly polarized.,( FIG 2) this design is good for Low Earth orbiting Satellites also by adding the reflectors “GAIN” can be improved , At point “X” a nylon washer or any isolator is to be use, Both the loops should not be touching each other</div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; text-align: justify;"><br />
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</div><div class="separator" style="clear: both; text-align: center;"></div><div class="separator" style="clear: both; text-align: center;"></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; text-align: justify;"><strong><span style="font-size: 130%;"><em>BALUN 4:1 & Q SECTION</em></span></strong><br />
To match the unbalanced source(RG 58) to a balance load (antenna )We will use BALUN that will be 4:1, This BALUN will give an impedance step up ratio of 4:1 as the impedance of the feeder is 50 ohms it will provide a match for 200 ohms terminating impedance, also to convert the high output Impedance of the BALUN(200 ohms) to 50 ohms impedance of the antenna balanced line that is QSECTION must be added to it Refer to FIG 3</div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiC5uNX3uJ3QqD9IyU_auHzGXA5cRikhb0rZpb7oO_Vm7crrlA-p9o6ACiYbR_aUb_1siPLsxTb8nGKO2miINGVKxRZN5BnGOZK7QXM0CB9A8llo_h-hG0S-wAXHbIDGJv5o57eECipzeuL/s1600/vu2ivv8.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" fea="true" height="210" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiC5uNX3uJ3QqD9IyU_auHzGXA5cRikhb0rZpb7oO_Vm7crrlA-p9o6ACiYbR_aUb_1siPLsxTb8nGKO2miINGVKxRZN5BnGOZK7QXM0CB9A8llo_h-hG0S-wAXHbIDGJv5o57eECipzeuL/s320/vu2ivv8.jpg" width="320" /></a></div><div class="separator" style="clear: both; text-align: center;"></div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; text-align: justify;"> <strong><span style="font-size: 130%;">Measurement:-</span></strong><br />
Length of the Q section should be 34.15 CM for VHF<br />
Length of the BALUN 4:1 should be 68.20 CM for VHF<br />
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Length of the Q section should be 11.38 CM for UHF<br />
Length of the BALUN 4:1 should be 22.76 CM for UHF<br />
Eggbeater Antenna View From Top<br />
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</div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; text-align: justify;">Have try to simplified the idea OF 0n6wg/f5vif (thanks for everything ) for better understanding , </div><div style="border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none;">73…………<br />
DE JAYESH (…- ..- ..--- .. …- …-) <br />
Email :-jayeshbanatwala@gmail.com <a href="http://qrz.com/db/vu2ivv">http://qrz.com/db/vu2ivv</a></div></div>VU2IVV Jayesh Banatwalahttp://www.blogger.com/profile/08110660191843195991noreply@blogger.com