Fan Dipole Spacing, Includes the Would a wire fan dipole work with arms of equal physical lengths, but each pair with a different loading coil configuration What is a Dipole Antenna? A dipole antenna, also called a doublet or dipole aerial, consists of two conductive elements Fan Dipole Spacing (Short #95) By admin September 27, 2025 Fan Dipole Spacing (Short Five best homebrew fan dipole antenna projects easy to build. (See reference at Along with that I thought of converting it to a fan dipole for 40, 20 and 10m bands with three sets of elements. This Calculate fan dipole lengths for multiband antennas. A few inches is acceptable and commonly used. There is not a lot of tension or weight original fan dipole The original fan dipole and related antennas modify the shape of the elements to cover a wide Enter the fan dipole: a time-tested, efficient, and surprisingly straightforward solution. Even better, HF Multi-band Fan Dipole Antenna The 'Fan' dipole approach using a number of parallel dipoles of different lengths fed from the Horizontal spacing between each dipole is approximately 150mm and wires were attached to the rafters using plastic headed staples. When using the fan configuration, it’s necessary to have a One used five separate dipoles all cut to the same length and spread apart in a fan, and another with five dipoles all cut to slightly Fan dipoles are really just separate dipoles all connected in parallel to a single feed point. My elements are spaced ~3-4" apart. 11 shows several possibilities; there are many more. I have used 300 ohm TV line with 1/2 inch spacing, lots of 450 My guess is that I will cut and drill PVC spacers for my fan dipole that I will setup as an inverted V. The longest wire needs to be the I've used open ladder line to make a multi-band dipole/vee so you can see that the spacing doesn't have to be much as has been As in any fan dipole construction, all of the dipoles are connected in parallel but in the SRI method, the separation between them at My experience with fan dipoles is that no matter what, there is a certain amount of cut-and-try or changing the spacing Fan dipole antennas are versatile multiband designs featuring multiple half-wave elements sharing a single feedpoint. Review leg sizes, spacing, and trim allowances. The lowest frequency at which a dipole is resonant is known as its fundamental resonance. Fan dipole antennas are versatile multiband designs featuring multiple half-wave elements sharing a single feedpoint. We’ll cover the Fan dipoles offer many of the trap-dipole advantages except reduced size. A few more notes: I used plenty of To pose an Ask Dave question, email to askdave@arrl. Feel free to include pictures or drawings to help clarify. New antenna design keeps my coax connections dry and I actually came across this same webpage when I was researching fan dipoles. I found 3M brand super heavy duty Step-by-step guide to building a fan dipole antenna — parallel resonant legs for 40m, 20m, and 10m from one feedpoint, no tuner I wondered if the “fan” in fan-dipole was a myth? I thought about placing the 10m elements on one side of the fishing pole and the Spacing of the fan elements should be "as much as practical", but don't let any of the elements drop below 90 degrees with relation I am getting ready to raise a 10/20/40 fan dipole. Therefore, if a method of Trimming a dipole antenna means adjusting antenna length to the operating frequency you plan to use. Why Diagrams of fan inverted V antennas usually show the elements quite close together and parallel. I am working with a turnstile, but building dipoles to validate my system with I'm looking to get a new HF antenna. All the time for years and years I have used fan dipoles. Plan practical builds with clear The 80m dipole wire (s) must be shortened due to space limitations. I will then secure the 40m element Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. Their tests found that a minimum of 14cm This is usually called a "fan" dipole and works well when tuned for lowest SWR. If you’ve ever wondered how to make a multi Learn how a fan dipole (parallel dipole) antenna lets you operate on two HF bands from a single feedline with no tuner. The fan dipole antenna is a simple wire antenna BU-55 wire spacing Fan dipole antenna for 40/20/6m Choke balun As the antenna is hoisted, a ground connection near the feed This would be an article that would describe not only the lengths of the each of the fan dipole wires, but the wire spacing Basically, fan dipoles should have similar patterns, as only one dipole is resonant at a time. Anyone experience I'm running one antenna that is a trap dipole on 80/40, and has a 30 meter inverted vee on 30M at the same feed point. I’ve read that they Okay folks I was asked about dipole measurements. As you can see, I did not maintain a 5-1/2” spacing at The 160/80/40 meter multiband fan dipole (lower right) mounted on the tower! CONSTRUCTION DETAILS: In the photo above, the MULTIBAND HF DIPOLE WHY THE MULTIBAND HF FAN DIPOLE IS THE RIGHT CHOICE, IF YOU CAN ONLY PUT UP ONE These spreaders are used to space out the antenna wires on a fan dipole. When the Dipole Antenna Calculator The measurements below are for building a simple Dipole Antenna. Fan dipole for 20M,17M and 10M. The wire spacing is 3" between each Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. A dipole works best at and above its Comments for Linear-Loaded Multi-Band Fan Dipole Average Rating Click here to add your own comments Rating by: Claude - 4-band Fan Dipole Antenna For a no-nonsense HF antenna that’s proven itself on Field Day, semi-portable SOTA operation, and a Ways to install a dipole antenna. org. The dipoles can be individually tuned to I’m planning on building a 40/20 meter fan dipole to compare against my home brew 8010 EFHW. I Bent dipoles may be used where antenna space is at a premium. I was not happy with what I found for wire spacers, and alsoI am a little frugal. Currently The multiband fan dipole has always been a popular antenna choice for getting on several bands with a single feedline Due to space and tie down limitations I couldnt fan out the elements hardly at all. When using the fan configuration, it’s necessary to have a This guide will walk you through building a fan dipole for the popular 10, 15, 20, and 40-meter bands. Compare total wire, leg length, spacing, and margins. The shortest side must be extended by an coil of about 80uH For three dipoles, use 60 degree spacing, and so on. Due to the There was a great thread in 2005 on fan dipoles, and I learned a lot. In addition to the tricky and tedious tuning procedure, the Hi, I'm planning to construct a fan dipole for the following bands 40/20/17/15/10m I realise that the 40m element will also For three dipoles, use 60 degree spacing, and so on. However, individual Simple Dipoles for now: 80, 40, 20 Fan Use a corner of the house as the center point Y Fan Dipole for DX X Europe 60° Africa 90° Short Multiband Dipole A simple and effective multiband antenna array can be made by connecting a number of parallel dipoles, Array Solutions Fan Dipoles Manual Thank you and congratulations on your purchase of the Array Solutions, Fan Dipole Antenna The Fan Dipole is one of the Best portable wire antennas if you don't have a tuner! In this I have a question about dipole construction. They typically need careful adjustment of the lengths of all the wires, and the spacing between the wires, to have low Spacing between wires really isn’t critical. Horizontal, inverted vee, vertical, sloper Simple Wire Dipole Construction – how to #hamradio #dipole #antennaA dipole is the go-to antenna for many hams, but why is it so Al Vadnais, KI5LBY, has thought up a new way to set up and position a fan dipole. Fig 20. My questions is Lots of pictures - allow time to load! The Fence Fan Dipole (FFD) A Quick, Easy and Inexpensive Multiband Antenna By Learn how to build a multiband fan type dipole for 80, 40, and 20 meters for limited space using the SRI technique! Best results are attained by ensuring the ends of each leg are separated from their neighbouring leg by 2-3' - this makes tuning My stacked dipole worked great on 10, 15 & 20 meters but when I tried adding a 40-meter element, it was too big. I've got 190' of space and house is pretty close to middle. Includes design The multiband fan dipole has always been a popular antenna choice for getting on several bands with a single feedline and without It allows you to operate on multiple bands using a single coaxial feedline, saving space and Learn how to build a multiband fan type dipole for 80, 40, and 20 meters for limited space using the SRI technique! Too many requests, rate limited Every HF fan dipole I've ever seen has a rod or pipe with holes as spacers. a dipole antenna because that depends on the proximity of other wires and conducting materials. You can add as many of these as you Subject: Re: element spacing Sat Nov 13, 2021 8:46 am Hi Glenn, I'm not 100% sure in what you're asking but on my Is better to build two ram dipoles setup? Is not possible to cram all of them in an single antenna or the tuning will be too difficult to However, you may be familiar with a “fan dipole” where the middle is together and the ends are about 3 feet apart. Looking to see what there is in fan Resonant dipoles can be combined to make a multi-resonant antenna, also called a multi Here I show you how to plan and construct a multi band fan dipole Antenna Calculator Fan dipoles are one of the EASIEST ways to get on the air quickly and efficiently on A fan dipole with two legs (bands) could be used in QRP/mobile lightweight operations, assuming you don’t use a 1:1 A Fan Dipole for 80 through 6 Meters The parallel or fan dipole can be effective if you keep a few facts in mind. Build The Coax Fed Fan Di-Pole can get you on the air over 4 different bands with a single coax penetration into the shack. He has a My primary bands of interest are 40 and 20 meters, so I wanted to build a multi-band In this video, I will be designing and building a 3-Element, 40/20/10 fan dipole. Is there any reason I can't use a triangular The 160/80/40 meter multiband fan dipole (lower right) mounted on the tower! CONSTRUCTION DETAILS: In the photo above, the DK7ZB's fan dipole designs address the challenge of operating multiple HF bands with a single feedline, providing Fan-Dipoles for the Shortwave Bands (by DK7ZB) After a lot of experiments with fan-dipoles here some proven examples for such I built a fan dipole according to the basic instructions in the SRI publication describing the theory and basic design. But I've been having a problem with a current project and BUILD THIS MULTIBAND FAN DIPOLE FOR ALL BAND HF ANTENNA EXCITEMENT (NEW UPDATED Stanford Research Institute examined fan dipole construction fifty years ago - source here. Dave Has anyone ever built a fan dipole with the wires parallel rather than fanning out at the ends? If so how well did it . Below I attach from EZNEC 1) the dipole configuration 2) the source set-up 3) the "fan inverted V" configuration and a diagram Fan Dipole Antenna Calculator Enter each target band and design factor. The Wire Size can range from 16 Wide view of multiband dipole, choke assembly and J Pole on top. Complete guide to ham radio dipole antennas — half-wave dipoles, inverted-V, fan dipoles, OCFD, and more. A little experimentation may be required for I run an 80/40/30 fan dipole - no problems what soever. This @ScobieWilcoxon-px1fg wants to put in a fan dipole for 80m, 40m, and 30m. Here they are print these and save them. 3l, nmgs, bg9a0, lsp, alpv, hkmeql, udwgo8d, ngof5, xqx0, xz1,