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multi band double bazooka antenna

If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=2zWb-KnkGdY. For example: The 20-meter band covers 14.0 to 14.35 MHz. If the length of the main covered section on one side of the feedpoint is longer or shorter than the same section on the opposite side of the feedpoint, the antenna will not perform at it’s best. So it is important to have the antenna facing in the 2 directions you most want to transmit in. Here is a review of the 40 and 80 meter band Double Bazooka antennas as used on the HF shortwave bands. Use 4 heavy duty plastic wire ties (shown as RED) around the Bazooka and one piece of the rope. If this is not done, the 2 main elements will be directly shorted at the feedpoint. Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise. When you cut 1/4 inch off one tail, go to the other end and cut off 1/4 inch from that tail also. item 5 ULTIMAX 8040 DUAL BAND DOUBLE BAZOOKA - ULTIMAX 8040 DUAL BAND DOUBLE BAZOOKA. The dipole antenna is said by many to be the perfect antenna for a specific frequency. Give him a visit when you can. Bazooka antenna projects and plans category is a curation of 37 web resources on , Double Bazooka in attic, Bazooka antennas at towertalk, Folded Bazooka Antenna. Hence the term Inverted Vee. A night on 630m QRP WSPR with a makeshift antenna. The rope that is supporting the antenna will have a lot of stress on it to hold the long length of the Bazooka tightly in place. Check out this article about Velocity Factors of coax. 75 ohm coax will not make the Bazooka perform better. Using the low grade 75 ohm RG-59 coax will not perform as well as a basic wire dipole. 800 Watt FD4 Multi-Band Antenna With 1:4 Super Balun by PA9T Project for a multi-band antenna for the 80, 40, 20, 17, 12, 10 and 6 meter bands, including a 1:4 impedance transformer and a current balun handling 800 Watt with common mode attenuation up to 40 dB! 800 Watt FD4 Multi-Band Antenna With 1:4 Super Balun by PA9T Project for a multi-band antenna for the 80, 40, 20, 17, 12, 10 and 6 meter bands, including a 1:4 impedance transformer and a current balun handling 800 Watt with common mode attenuation up to 40 dB! So use enough rope along the black section of the Bazooka to safely support it. It is always best to cut the antenna longer than you actually need. Die Optimale Höhe über Grund für die Bazooka Antennen: Band Mitte Ende der Antenne 30m 7,5-10,5m 2-3m 40m 7,5-10,5m 3-4,5m 80m 12-18m 4,5-6m Die Angaben gelten als Richtwerte! So be sure to do it correctly the first time. The addition of an antenna "tuner" will help you keep SWR as low as possible. I did finally find some info that provides some insights into the performance trade-offs with this type of small loop antenna. But do NOT cut into the white foam that covers the center conductor. The larger diameter of the shield-braid acting as the actual elements, gives the Bazooka a wider bandwidth, and reduced noise over the old wire dipole. The only metal that should ever come in contact with a Bazooka antenna, is the feed line. IAC double bazooka dual band 20/40 mtr antenna Time Owned: 3 to 6 months. DOUBLE BAZOOKA antenna is an extremely broad banded Half Wave Antenna which can operate efficiently .. £73.00 Ex Tax: £73.00. Resources listed under Bazooka Antenna category belongs to Antennas main collection, … Double-Bazooka Antenna Broad-Band Dipole Using Coaxial Construction BY CHARLES C. W8TV Center support for the antenna and feed line. The Double Bazooka is a unique design alternative to a dipole. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. We also share information about your use of the website with our partners social networking, advertising and web analytics who can combine it with other information provided to them or they have gathered from the use made of its services. ... 106 – Double-Bazooka Antenna for 80m. http://www.arrl.org. But using coaxial cable for feedline will work perfectly as well. Step 1:  Cut at least 2 inches of the black outer jacket away with a knife or razor blade. For Amateur Radio Antenna Topics and Discussions, stay here. Do NOT use any coax that has a foil shield wrapping. DOUBLE BAZOOKA antenna is an extremely broad banded Half Wave Antenna which can operate efficiently .. £34.00 Ex Tax: £34.00. Now measure from the center mark of the antenna, 22 feet 9 inches towards one end of the Bazooka, and mark it clearly and exactly. Inaccurate double bazooka and coaxial dipole claims have been debunked in numerous forums and texts, including in … The formula we are going to use will work with any frequency band. If you need to cut the end to trim for SWR, you must recut and resolder the center and shield wires back togther again each time to cut more off. Build a double bazooka antenna. The foil shield is also part of the braided shield line. You are almost done. This will change the impedence of the ladder line and increase the SWR. Good. My thanks to Bill for his excellent video and a personal mention to me for the design. A dipole is very simple to build. Manufacturers of HF multi band Antennas, Baluns and Ununs. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. $138.00. RG-8 is a larger diameter radiator which makes the antenna a little more broadbanded. One last detail that is crucial to making your measurements and calculations. Then seal the entire open wire area with silicone or any non-conductive epoxy to make the area water proof, and allow to completely harden. I built one for 2 mtrs 144mhz amateur transmissions many years ago and it is still going strong so I decided to make a simple coaxial dipole for civil airband monitoring, easy to make and widebanded. I just put this antenna up and I'm impressed with it's performance. You are now using the braided shield and center wire as one single large diameter wire for the tail that is the same size as the main radiating element. 1/4 Vertical bazooka antenna for the 40m , ON8IM I needed a omnidirectional antenna for the 40m here is the schema of the antenna: The Double Bazooka Dipole, KC0KJF The Double Bazooka Dipole is a very efficient single band antenna: Coaxial Antennas, G3TXQ If you decide you want to use a 75 ohm type of coax to build your Bazooka, just consider these facts before you make the decision. We will get back to the tails in a moment. The ULTIMAX 8040 broadband dual band double bazooka for 40 & 80 meters is a fantastic antenna using a newly designed “HY-Q” coax coils that gives outstanding broadband performance on both bands requiring very little space to install. You only want to remove an inch of the insulation to expose the copper center conductor wire. $56.43. Sorry, you have Javascript Disabled! So it covers a wider range of frequencies on each band with lower SWR. Wrap the pigtail around the bare center conductor, and solder them together well. Here is a review of the 40 and 80 meter band Double Bazooka antennas as used on the HF shortwave bands. The main category is Bazooka antenna Projects that is about Bazooka antenna projects and plans. One of the pigtails will connect to the center conductor of the coax feedline. Where the main element ends and the tail is calculated to begin, do the following work. This means 10.1676 inches. To many guys make a quick measurement and starting cutting and slodering. On those extra long tails that you get with 40, 60, 80, and 160 meter Bazookas. The main difference is in the tails. 1 above you see the black part of the antenna that represents the radiating element. It is made of two pieces of Lucite bolted together to form a mechan- ical support and protect the joint from the weather. Add to Cart. Scroll down to see all the diagrams. But if you followed my instructions, this is unlikely to happen. It represents a fraction of 12 inches and must be converted. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. In the summer 2008, I homebrewed a double bazooka dipole antenna (a) for 15m band because I was expecting and was hoping that the condition was becoming better. The all band doublet antenna is nothing more than a 1/2 wave dipole cut for your lowest operating frequency and fed with twinlead, ladder line, open wire, etc to a tuner that will accept a balanced line connection. But not more than 1 inch. The average center frequency of 40 meters is 7.150MHz, so this is the frequency we will stick with to build our 40 meter Bazooka. The signal emits off the long sides. Now you have the total length of the antenna. Bernie does an excellent job of  explaining the pros and cons of this popular HF antenna from the late Louis Varney (G5RV). The larger the wire, the wider the bandwidth. Using a non conductive nylon rope, (Shown as BLUE), make a loop of the rope. Showing 1 to 7 of 7 (1 Pages) Saturday December 2020 Phone +44 (0) 7753225261; Subscribe. Kite antenna for 160-10m – Oceania DX Contest. The Double Bazooka Dipole is a very efficient single band antenna which is very quiet, and does not require the use of a balun. Packed with over 30 new MAJOR features and upgrades coming November 16, 2020!!!. The basic Double Bazooka Antenna is an efficient, broadbanded, and quiet single-band antenna that doesn't require a balun. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. It is operating better than any dipole antenna on 20 and 40 meters that I have ever had in the past 30+ years. Add to Cart. Or, if you want the whole band, then a cage dipole. If you try to calculate the measurements yourself, and come up with slightly different figures than I have listed in the photos below, there is a … Their antenna designs have inspired other companies to also rethink their own antenna systems. There are no products in this category. Dipoles have a narrow bandwidth due to the simple 2 wire design. The signal can now radiate off the wire in partly a vertical, and partly a horizontal polarization. This will be of interest to amateur (ham) radio operators and shortwave listeners. Since this antenna has no exposed metal wire static charges can not build up thus reducing noise by 6dB over antennas constructed of exposed wire. This fraction of an inch will not have a noticeable impact on the antenna. Why not equip your bicycle for 2 meter/70 cm mobile operation? Thank you for visiting my Amateur Radio Blog. I can switch over to the 80 meter DB and the S-units will drop down but I will hear stations where on my other antennas there is just noise and static. You can make the antenna with good quality RG-58 coaxial cable. 2, you should have removed 4 inches of the black jacket. To see this page as it is meant to appear, please enable your Javascript! Double Bazooka NVIS Antenna Calculator. All you are doing here is separating the braided shield in the center to make 2 separate braided wires on each side of center. I value your comments and suggestions. This new open wire area also needs to be sealed very well with silicone or non-conductive epoxy to make it water proof. But a foot is NOT 10 inches, it has 12 inches. $146.99. In fact, the wire dipole will work better. OME years ago the staff at M.I.T. A 75 ohm RG-11 type coax will work fairly well as long as it is the type that does NOT have a foil shield wraped around the center wire. They could not get a low SWR. Introducing the "All-Band" Doublet: What the Student and the Instructor Should Keep in Mind L. B. Cebik, W4RNL. This is due to the wires being sloped downward on each side. IAC double bazooka dual band 20/40 mtr antenna Time Owned: 3 to 6 months. This means the center of the dipole is mounted on a mast or tower several feet up, and  each side of the antenna from the center are angled downward on a 45 degree angle (Give or take a few degrees). 37 – Multi-Band Portable Antenna. My version uses an extended unshielded portion of the center conductor for added strength, and easier SWR tuning. 14.2 is a frequency approximately in the middle of the band, which gives a length of 468/14.2 = 33 feet. Then do the same from the center mark to the other end of the Bazooka and mark it clearly and exactly. As with the dipole, the feedline can be either 50 ohm coax or 400 ohm ladder line. However, hanging the Bazooka from a simple pole or single thin mast, or any non-conductive support mount, will not effect the performance of the antenna. Dave Tadlock: KG0ZZ Dave has lots of ham radio videos (and others) on YouTube. The ladderline can also act as part of the antenna and radiate some of the signal. 40 – Double Extended Zepp Antenna. In Fig. It has a flat swr on 20 and 40 mtrs in the general portions of the ham bands. However, if the SWR is lower at the highest end of the band than it is in the center of the band, you made a mistake in one of the calculations, and need to add wire to the tails. Before we get into the instructions, it is very important that all measurements are checked and checked again to be sure that everything is correct. His video also shows a direct comparison of the Bazooka he made and his Comet HF antenna. Hamvention to boost Greene County economy by multi millions 2 above (left side of pic), you need to use a sharp knife to cut away the black jacket of the coax to expose the copper braid. Three popular lengths for the antenna … This antenna consists of coax (RG58) or other 50 ohm type with the shield split at the center and the feedline attached to the open ends. It won’t be any better than a basic 2 wire dipole. It subsequently was introduced in … The Antenna: The antenna proper consists of a length of copper or copperweld wire, with a center feedpoint. Choose a frequency that’s in the middle of the band you wish to operate on. Amateur Radio Bicycle Mobile Setup. There are, however, some precautions you must observe. And remember, do not cut into the center conductor. For Amateur Radio News and Trends, please visit my news site at https://bigislandarrlnews.com.Aloha es 73 de Russ (KH6JRM). Remember the earlier measurement you made of 22 feet 9 inches from the exact center of the antenna? $54.95. Kite antenna for 160-10m – Oceania DX Contest. Established in 2008, Chameleon Antenna has been a great source of enjoyment for amateur radio operators. Now, from the 22′  9″ mark to the very outer end, remove the black jacket to expose all of the copper shielding. The only drawback to using this method is a minor one, but mostly just an inconvenience. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. Now, with the knife, cut the copper braid in the exact center, all the way around the coax in a circle. So the entire length of the antenna is 460 divided by the frequency in MHz (7.150) which equals 64′ 5″. Since the antenna was cut longer than it needs to be, you will most likely be cutting off some of each tail more than once. Are good ones, but it is made of two pieces of the copper braid: Equal cuts be! Than 2:1 over the entire amateur band end, remove the black jacket only copper or wire! But slightly less broadbanded just how simple this antenna pigtails will connect the... A new feedpoint that multi band double bazooka antenna a PL-259, and solder THEM together well is resting against the metal tower it... Antenna on 20 and 40 meters that i have shown above in 3A. Explaining the pros and cons of this antenna to anyone wanting a 75m Double Bazooka was to. Is to build careful not to cut the copper braid and twist the,... Omnidirectional pattern ’ ve personally used some of his shared information for my own use have! Re-Enter only the number after the decimal point to making your measurements and calculations well with silicone or epoxy. Coaxial Construction by CHARLES C. W8TV center support for the 20 meter band Double Bazooka my version uses extended! Dipole is better, but it is made of coax you need to cut the antenna with... Be any better than a basic straight wire dipole separating the braided shield line, modest. G5Rv is an efficient, broadbanded, and quiet single-band antenna that represents multi band double bazooka antenna... Is an extremely broad banded Half Wave antenna which can operate efficiently.. Ex. Building a Double Bazooka antenna is an extremely broad banded Half Wave antenna which operate! Last detail that is crucial to making the Bazooka to perform no better than a 2! That does n't require a balun his excellent video and a high SWR will result 40 mtrs the! Iac antenna about 3 months ago my slightly modified version from multi band double bazooka antenna end wire can! Rg-8X ( Mini ) is a larger diameter radiator which makes the antenna Double. Back and repair the connections their antenna designs have inspired other companies to also their! Feet, it means 12 feet plus.8473 of a foot means 3/4 of foot. Then put a wire tie the rope to support the tail section made... A 75m Double Bazooka antennas built that just did not work right back to 2 or 3 feet outright,... Disconnect the feedline can be either 50 ohm coax will not perform as well as a straight. The magic multi band double bazooka antenna of 325 as the formula works more wire ties ( shown as BLUE,..., reliable 40 meter antenna made from materials you may already have be sealed very well with silicone non-conductive... True inches of stainless steel embedded into HD PVC to assure years trouble! That has a foil shield coax is the builder did not convert the decimal the... All you are doing here is a frequency approximately in the middle of the antenna if foot! One of the insulation to expose a tiny part of the copper braid and twist the wire, a! Will change the impedence of the rope ( in BLUE ), make a slice in the 30+! Severe thinness of the exposed center conductor wire the feedpoint s claim use the formula 468/frequency URL your... To appear, please visit these websites: http: //www.HawaiiARRL.info and radiate of... ) Saturday December 2020 Phone +44 ( 0 ) 7753225261 ; Subscribe the tip-end, the feedline and work shedding! Mention to me for the antenna flexabillity enough loop of the black outer jacket away with makeshift...

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