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Mmana efhw JohnnyMac shows the radio world how it’s done. 4 GHz helical antenna radiation pattern (NEC simulation). The Numerical Electromagnetics Code, or NEC, is a popular antenna modeling computer program for wire and surface I have a 40m EFHW wire antenna, but usable trees are not always available. For SOTA, it depends whether the transceiver has a built-in tuner. Let’s have a look at a few After searching online, I couldn't find a single reliable model of an EFHW in MMANA. Overall, I got good results with the EZNEC antenna description files. So I put up a separate 20M EFHW (33'-3" long) for testing on that band. Click on File->Open-> Modeling end fed random wire antenna in MMANA-GAL software . hopefully this Skrátená 14MHz EFHW anténa pre synátora. Unlike many END FED antennas on the EFHW-8010 * 3. On its fundamental there are two primary nodes in a figure 8 pattern broadside to the antenna. I haven’t modelled a ‘random’ ef wire but I have done an EFHW and it worked fine. 453. This antenna is design on the same basis but instead of folded wires to the center pole of the boom End-fed half-wave antennas (EFHW) are very popular because they are easy to hang. MMANA Quick Start Optimization part1 Optimization part2 Optimization part3 Optimization part4 A short antenna optimization tutorial using MMANA-GAL Al Couper NH7O These pages will Please note that the views expressed in the presentation and the Q&A don’t necessarily represent those of the Radio Society of Great Britain. Modeling an array will allow you to experiment with different I'm going to go with buried radials for now. The following plots are simulated for a 30m long antenna inverted L configuration. One limitation is the lack of high accuracy ground, that starts to matter (sometimes a lot) when you model low (under 1/2 wave length EFHW-4010-1K-Plus™ Multi-Band End Fed Half Wave Antenna. 0, 10. The package comes with a I have made 1000's of contacts. The ability to make and rig your own antennas is one of the cornerstones of communications preparedness- and his success attempts at modelling the antenna with EZNEC, Martin G8ODE for his thorough detailed testing and modelling with MMANA-GAL and to Scott, VE3SCP, for providing such detailed analysis Anyway, after an afternoon of fiddling with MMANA-GAL I ended up with an answer – an antenna with a total length of 20. MMANA-GAL is an antenna-analyzing tool based on the moment method, which was introduced in MININEC version 3. I am teaching myself MMANA-GAL , probably in a backward manner but it is helping me more than the formal methods. One limitation is the lack of high accuracy ground, that starts to matter (sometimes a lot) when you model low (under 1/2 wave length Starting EZNEC Modeling 3 CTU, Dayton, 2011 The EZNEC 1 software, created and marketed by Roy Lewallen, W7EL, can be obtained from www. 13 µH and a T225-2 which Callum (The DX Commander) asked for a 49:1 or 64:1 End feed half Wave (EFHW) so he could test one against his DXC All Band Vertical antenna, So I built him o I sold the antenna after discovering it was getting warm to the touch when running 800 watts PEP. 0, 3. The EFHW-8010-2K andrew georgakopoulos sv1dkd modeled the end fed half wave efhw antenna using mmana gal software he evaluated the efhw 8010 2k from myantennas com for field operations comparing it to random wires ocfd and dipole antennas his MMANA but I honestly haven't found the time to do it yet. The transformer should Starting EZNEC Modeling 3 CTU, Dayton, 2011 The EZNEC 1 software, created and marketed by Roy Lewallen, W7EL, can be obtained from www. End-fed wire antennas are a different beast. Stars. Labels: antennas. I played about in MMANA-GAL and came up with a design. 1 or less. I have used them all, but most of my models are done in EZNEC. You can find the full video here: https://youtu. So I decided to design and build my own model from Callum (The DX Commander) asked for a 49:1 or 64:1 End feed half Wave (EFHW) so he could test one against his DXC All Band Vertical antenna, So I built him o EFHW LNR Precision EF-10/20/40MKII Test Data; HT Antenna Comparisons; The J-Pole antenna is herewith fixed; 2 Meter, 5/4 Wave Antenna Revealed; Categories Antennas Tags counterpoise, EFHW, end-fed. , or ARRL antenna book on efficient EFHW matching transformer and various antenna topics. 5m and 12. I have made many The 49:1 impedance transformer ( or 64:1 ) will help you bring down the high impedance of your resonant EFHW antenna to almost 50 Ohm. For resonant wires, I use a 40m-10m EFHW and a 20m EFHW. Antennas/End-Fed/End Fed Half Wave Antenna; The title of the main category is End Fed Half Da muss die EFHW herhalten wenn ich demnächst als HL5/DD5NT unterwegs bin. Steve Nichols, G Mailing Address: Greater Norwalk Amateur Radio Club 304 Main Avenue #115 Norwalk, CT 06851 The challenge with the EFHW is feeding it as the end is a high impedance point (apparently between 2000 – 6000 ohms depending on the surrounding environment). com . He evaluated the EFHW-8010-2K from Myantennas. It is nice to have another easily EFHW-8010-1K-Plus™ Multi-Band End Fed Half Wave Antenna . Contribute to Kees-PA3KJ/EZNEC_Files development by creating an account on GitHub. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. 5. About. 0, 0. My Prototype: 1:64 Matching Auto Transformer. it/TC0jB6. 25m for a 41%/59% feed point), fed with a homemade twin core 4:1 balun and Let's model short or compact 20m dipole with MMANA; End-Fed Antenna Kit; Delta Loop Antenna; Testing a tape measure yagi antenna for 2 metres; The simple coax cable The freeware antenna modelling program MMANA-GAL was used to study the K1POO Antenna. Mostly the results Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. The EFHW uses a 49:1 transformer so the SWR Describe your experience with the MyAntennas EFHW-8010-P 200W 8-band End Fed Half Wave and tell us why you give it the rating you did (required). txt) or read online for free. He evaluated the EFHW-8010-2K from Listing of the files. I get one end up on a mast or in a tree, slope the wire down and put the 49:1 transformer and The following is a list of materials required to make a 49:1 unun impedance transformer for an end-fed half wave antenna. com for field operations, comparing it to random wires, OCFD, It shows you step-by-step how to input antenna designs into MMANA-GAL, how to adapt designs you are given and how to optimise your designs for the best performance. Other useful information would include Hi Santi, OK, now I understand. 05 wavelength wire inline with the half-wave radiator. They are not a half-wavelength long, meaning that, if you Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. If you pass from this point on it’s under your responsibility. There were several variants, however, none were accurate to my antenna’s specifications. Skip to secondary content. Withe the apex The MMANA-GAL models used are only an indication of what might be expected in a real situations, and there can be no guarantee that the program can replicate a real situation since After modelling the G5RV in both inverted and flat modes with MMANA, it looks to me that it doesn't really matter. 4, 0. 13 µH and a T225-2 which EDIT2, for op, commonly I found the on EFHW that the fundamental will shift in frequency, for example when I cut my 40m EFHW the <SWR is usually something like 6. Readme HALF WAVE END FED HWEF / EFHW ANTENNA / RADIO AMATEUR BLOG. The EFHW is a resonant antenna and will not need a tuner, the long wire will require a tuner. Pre 14MHz KV prijímač v synovej izbe sme potrebovali vyrobiť anténu napájanú na konci a k dispozícii bolo len 5m dĺžky. So I decided to Laselki. This document describes a shortened multi-band End-Fed Half Wave (EFHW) antenna that is MMANA-GAL MODEL RESULTS. The package comes with a Mmana Gal -Tutorial - Free download as PDF File (. Open menu PDF-1. These 3 programs are the most commonly used by radio This is a review for the MyAntennas EFHW-8010-1K, designed by Danny Horvat and I’ve attempted to add some information not contained in other reviews. An efhw is a fine antenna. End-Fed Half Wave (EFHW) Antenna Modeling with MMANA-GAL 13 March 2020 Technical & Featured Articles by Andrew Georgakopoulos - SV1DKD Leave a Comment on 2. By doing this as a half square we can make the harmonically related bands perfor Many people confuse the EFHW with a end fed long wire. Center fed one has been These were produced with MMANA-GAL, an excellent program. On the second harmonic there are 4 lobes in an x pattern. By Roosdiarto Rooskandar, Having driven my ham radio budget into the red with the tower project, I have resorted to using a freeware antenna modeling program: MMANA The modeling package is based on MININEC These include EZNEC, MMANA-GAL, and 4nec2. First, you need 260 feet of wire and no coil on the antenna. 40m dipole at 20m; 40m 2 element inverted Vee antenna; 40m Moxon Rectangle at 12m; 40m vertical dipole at 20m MMANA-GAL on the other hand is based upon MININEC which was written by John Rockway with support from Jim Logan. PA3HHO's HALF WAVE END FED HWEF / EFHW I started modelling an antenna in MMANA-GAL and found that you could make a 20-15-10m EFHW using traps for 10m and 15m. 5m Antennas Are Now Modeled •Antenna modeling used to be the domain of scientists and engineers with very expensive antenna ranges covering acres and acres of land strewn Mar 13, 2020 So I fired up MMANA-GAL, and looked in the antenna library for a ready modelled EFHW file, albeit, there wasn’t one!well there wasn’t one like mine that is. eznec. In this work, it can be seen that there are no change in SWR(Stand Resource Details You will find this resource in just one category on our links directory. Well, Roy Lewallen, W7EL, author of #EZNEC, explains how to model your first antenna using EZNEC. My "main" antenna was a 205' g5rv at 65' flat topped. (EFHW) (Click "SHOW MORE" below to see the Amazon links)You will lear Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. such as features to export data as comma separated variables file (CSV) into a To demonstrate the program, MMANA-GAL basic will be used to design and analyse a simple 2m two element vertical Yagi using 2mm diameter copper wire with the antenna base placed 1. EFHW Antenna Modeling with MMANA-GAL http://dlvr. A NEC model that includes the transformer helix helps demystify the end-fed half-wave (EFHW) dipole antenna using the autotransformer as impedance converter. Die originale OCFD Windom hatte nur eine Speiseleitung, nix Koax, nix Hühnerleiter, nur 1 Construction Details 49:1 Un-Un For End-Fed Resonant HalfWave Antenna by Gordon Gibby Version 1. com which [] Please forgive the very basic question. I created a model for a 20m Half Square antenna and the radiation plot looks I just did a quick mock-up of a 20m EFHW in MMANA, and used SimSmith to model tuner losses assuming reasonable values for matching network component Q. You will also need a half-wavelength length of wire (14 or 12 gauge typically) in order to construct Rolf, KE1Y, has a EFHW 80 - 10 and it's wire has broken near the loading coil. xになる、というウソみたいな話があるから。とはいえググってみても、うまくいっている人といない人がいたり、 After searching online, I couldn’t find a single reliable model of an EFHW in MMANA. 55 ***Wires*** 4 0. If You need repeating Watch, better download it with highest resolution possible. 4, 8. Note . With such a 1:49 balun, one can realise different designs for an EFHW antenna, for example mono-band Want to design an #EFHW antenna, but you can’t find a ready-made model for #MMANA-GAL? Well, now you can! Another interesting article by our dear friend SV1DKD, with informative and In January, 1998, the ARRL Board of Directors changed the ARRL advertisement-acceptance policy to permit the advertising of antenna gain figures for antennas whose performance can 13406 SE 32nd Street, Bellevue, WA 98005 l 425. The EFHW uses a 49:1 transformer so the SWR The 80-10m EFHW This is a shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. 1 Nov 13 2020 (added exploded photo of the jack installation) If you saw my last antenna update video then you'll be pleased to know that I freed the caught wire and finally have my EFHW installed how I wanted. 1, 18. nec are 4NEC2 compatible. I cut the wire and wound 160m EFHW Antenna. BOB, the The MMANA GAL program contains an optimization module which is used to arrive at the optimum length of a quarter wave antenna for the 20m band. To those who are An introduction to antenna modelling using EZNEC over a series of videos with an introduction to version variation and what this might mean to your simulatio EFHW Vee Joe WB9SBD #351 Anyone have a MMANA File for these End Fed Half Wave antennas? I see typical setups being it in an typical inverted V gonfigureation. I struggle a lot with the Disclaimer: Antennas is a very addictive subject. Bear in mind you’ll need about 10 minutes for a proper reading of this post (so go and grab a beer before you get This is an update to a previous experimental antenna. 160m low dipole; 7 MHz / 40m. The BASIC source code of the computation engine is published as a PDS in MININEC. The Matching Auto Transformer with 16 primary turns and 2 secondary turns (the 2-turn secondary winding is bifilar-twisted with the first 2 primary turns). I found that putting 220pf in parallel MMANA-GAL MODEL RESULTS. 14 stars. ” While its name suggests they designed it with EFHW antennas in mind, I had a slightly different plan for it. mab). pdf), Text File (. 40m dipole at 20m; 40m 2 element inverted Vee antenna; 40m Moxon Rectangle at 12m; 40m vertical dipole at 20m I didn't have much luck with that while using the 40M EFHW on both bands. I have already used this to model my current 80m Inverted L with resonant Using the gear explained in the previous article about these end-fed dipoles, I performed one run with an additional piece of “counterpoise” wire 0. 8 MHz / 160m. The Etsy vendor is 3dPrintedSolution, and they list the product as “EFHW End Fed Half Wave Antenna Radio Box. In this webinar Steve, G0KYA looks at alternatives for small gardens, including both commercial and home-made variants. There are some changes if you want to do a 160m EFHW antenna. com 2 Elevated Mounting: Advantages Disadvantages >90% efficient with two . net (@laselki_net). Readme License. As I mentioned above I bought an antenna like an EFHW-4010 from a friend of mine and I want to see if I can get good multiband performance This video shows how I made my 49:1 transformer for my End Fed Half Wave antenna. But you would need a variable capacitor to An Excel (XL) workbook to calculate antenna gain/temperature ratio (G/Ta), average gain, directivity, and other metrics by using 3D pattern data from EZNEC, AutoEZ, 4nec2, A. Unlike many END FED antennas The EFHW-8010-1K provides an easy-to-deploy antenna that can be operated on all HF bands, except 60 meters, with a low enough SWR to be used without an antenna tuner on most The EFHW-8010-1K provides an easy-to-deploy antenna that can be operated on all HF bands, except 60 meters, with a low enough SWR to be used without an antenna tuner on most In effect the W3EDP is an EFHW for 80m (126 ft top, 17 ft counterpoise, just under the traditional 132 ft. From those examples, one can gain a wealth of knowledge that can guide antenna selection. maa extension are MMANA-GAL type and . 3:1) on 80m and 40m, and be The EFHW - an efficient The EFHW is a very adaptable antenna as we can configure it in so many ways. Hello, I wonder if someone can help me understanding the MMANA-GAL "HF components" function. The program use the There is far more that the MMANA-GAL (Basic) program that can be written in a very short article e. In practice better SWR results & hence improved efficiencies can MMANA-GAL - 160m Inverted L - Hightail Pitchfork I've been putzing around with mmana-gal software - I download (for windows) this program. Email This BlogThis! Share to X Share to Facebook Share to Pinterest. The document provides instructions for using the MMANA-GAL antenna modeling software. If it doesn’t then the 5 band EFHW is better as it can be built to need no tuner on the 5 bands. EFHW-8010-1K EFHW ANTENNA The perfect antenna for DXing, EMCOM, ALE HF-link sta-tions, NVIS, MARS, ARES, RACES Various installations such as horizontal, vertical, an Not everyone has room for a mast and HF Yagi. There were several variants, however, none were accurate to my antenna's specifications. I have corresponded with him on accurate EFHW transformer models using SimSmith. The model uses copper wire 2mm diam, the antenna height is 8m above real ground (5mS/m You can’t, for example, generally use a 40m EFHW antenna on 20m. And This is a simulation of the radiation pattern of an End Fed Halfwave antenna (EFHW) using the program MMANA GAL. I created a model for a 20m Half Square antenna and the radiation plot looks I love that you gave Cal credit and wasn't taking away from him. The Christman calculator will get you quite close to the proper Hello, I wonder if someone can help me understanding the MMANA-GAL "HF components" function. 000e-04, -1 0. The original experiment video is here:https://youtu. 5 %µµµµ 1 0 obj >>> endobj 2 0 obj > endobj 3 0 obj >/XObject >/Pattern >/Font >/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents End-Fed Half Wave (EFHW) Antenna Modeling with MMANA-GAL 13 March 2020 Technical & Featured Articles by Andrew Georgakopoulos - SV1DKD I wanted a quick & easy W8JK/MOXON antenna Variant : This design is a variant of the Open-Folded W8JK . 3 1) Tools A drill, corded or cordless. 3, 0. I borrowed some good quality 20m EFHW VerticalAntenna. It hears better too! « 1; 2; 3 » × eHam. . 1. It The EFHW-8010-1K provides an easy-to-deploy antenna that can be operated on all HF bands, except 60 meters, with a low enough SWR to be used without an antenna tuner on most I have used the 1080 efhw from myantennas with my IC 7300 for almost 2 years using 100 watts. And boy End-Fed Half Wave (EFHW) Antenna Modeling with MMANA-GAL 13 March 2020 Technical & Featured Articles by Andrew Georgakopoulos So I recently purchased the EFHW-8010-2K from Myantennas. Various dipoles vs. I don’t know of a technique to measure coax line lengths using an SWR meter and 50 ohm load. It has worked great on all bands. GPL-3. The antenna This is a simulation of the radiation pattern of an End Fed Halfwave antenna (EFHW) using the program MMANA GAL. 2k transformation wire winding ratio of 8:1 Hi Edward. M. See the plots (right) 4 square,verticals,phasing,collins, The number of turns for a toroid coil is calculated with the formula : So, for the above calculated value of 1. I use an EFHW with a 49:1 Unun. Philips #2 screwdriver, “stubby” or full pattern of an end fed halfwave antenna efhw using the program mmana gal the efhw uses a 49 1 transformer so the swr is set to 2450 ohms for the simulation designing a 40 meter vertical Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. 000e-04 This video shows characteristic of EFHW(End Fed Half Wave) antenna as vertical deployment. UPDATE: Since this article was originally published, I went to the pesky South Arm NEFR stage and did an official MMANA-GAL allows users to save the results of Calculations in a special file ( antenna name. 1910 l support@steppir. The EFHW-8010-2K preforms much better then the G5RV. 75m (8. The package comes with a Listing of the files. Here is a link to my previous video showing Basuc MMANA-GAL ist ein Werkzeug zur Antennen-Analyse, das auf der mit MININEC Version 3 eingeführten Momentenmethode basiert. This hobby is about experimenting and hacking together an antenna and you did exactly that. 000e-04, -1 18. 3rd harmonic there are 6, and 4th harmonic there are 8 Esta es una simlación del patron de radiación de la antena de media onda alilmentada de un extremo lateral (EFHW). 0, -1. Needle-nose pliers. Some of these are useful and surprising - like how to optimise a 40m off centre fed dipole (Windom) so that you can get 15m. The performance on 80m is the same. 4-inch or 6-inch adjustable wrench OR a set of small sockets with a small handle. This is a collection of my antenna simulation files in MMANA-GAL and 4NEC2 Resources. With an EFHW and 80 Meter NVIS Antenna – Don’t Get Hung Up on Theory. Of course, other NEC-based antenna modelling and design tools and programs do exist: for instance: EZNEC Pro, 4Nec2, MMANA-GAL * and others, but all of them need to be installed on your PC or Mac/Linux machine. be/4ZMdT4SX0Xo#ant EFHW End Fed Halfwave Antenna category is a curation of 43 web resources on , Trapped five band EFHW SOTA antenna, EFHW matching unit, End Fed Half-Wave We show a method of constructing an EFHW antenna for portable operation like field day, and POTA, and emergencies. Skip to primary content. Andrew Georgakopoulos, SV1DKD, modeled the End-Fed Half Wave (EFHW) antenna using MMANA-GAL software. The model only provides an indication of the expected performance of this antenna. be/MKUZsC9BZmYIf you like my videos, please subscrib The same with Vertical Antenna design principles. The swr readings are 1. I usually go with a 3. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. Wire cutters. MMANA-GAL » MMANA-GAL » integrate Balun or Unun Hi all, I am new here and about to make my first steps with the software. mab file is stored in the same directory as the antenna file. This could be at the bottom but it is more efficient if it is nearer the middle. How can Files with . By default the. This is where I publish a lot of my features and thoughts on HF propagation, antennas and other ham radio topics. There are three versions of 4 square,verticals,phasing,collins, The number of turns for a toroid coil is calculated with the formula : So, for the above calculated value of 1. I thought of describing a center fed one and an end fed one. Generally an EFHW will be in the range of 2,000 to 5,000 ohms at the very end of the dipole when resonant. 0 license Activity. The antenna has almost 300kHz bandwidth on 80m Andrew Georgakopoulos, SV1DKD, modeled the End-Fed Half Wave (EFHW) antenna using MMANA-GAL software. This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15 and 10m bands. Multi Band EFHW - Free download as PDF File (. 2, 0. I also have a new high-power EFHW-8010-2K on the way, because I’ve been working MMANA is a good modeler to learn. In practice better SWR results & hence improved efficiencies can End-Fed Half Wave (EFHW) Antenna Modeling with MMANA-GAL 13 March 2020 Technical & Featured Articles by Andrew Georgakopoulos So I recently purchased the Starting EZNEC Modeling 3 CTU, Dayton, 2011 The EZNEC 1 software, created and marketed by Roy Lewallen, W7EL, can be obtained from www. 25 wl radials Mounting is I am using MMANA for almost all my antenna simulation and just to compare with a 40 Long EFHW , the results are almost identical. So, as a deployment-specific solution, I thought of setting up this Skip to main content. I bought its big brother, the EFHW-8010-2K in its place. I The 80-10m EFHW This is a shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. It looks at what MMANA-GAL is, how to use it and then a number of different applications. A Simple 20m Dipole in Free Space Start up MMANA-GAL. ) The tuner that I made for mine (using a big brass variable cap that I bought to make a TRF in the late 50's!) covers 80 m to 20 Aims Introduce MMANA/GAL in a practical way Show how to use it for HF antenna development or evaluation Explore the basic facilities Understand its capabilities MMANA-GAL. La simulación actual utiliza la versión g I’ve put up and used two EFHW-8010-1K antennas, plus an EFHW-8010HP and even an EFHW-4010. g. net MMANA is a good modeler to learn. 1 comment: Geo 15 March 2023 at 15:16. These programs Prototype: 1. I write for a number of radio The G0KYA EFHW – an end-fed half wave monoband HF antenna, plus two multiband versions (New!) A practical, cheap monoband or multiband (new!) vertical antenna that is great for DX Back to reality. Nasimulované v MMANA, zrealizované asi za hodinu. 9mhz(40m<2:1), There are several versions of multi-band inverted L antennas out there. 0, 8. 4, 36. Posted by Steve Nichols at 08:23. MMANA-GAL hat folgende Funktionen:-Editor auf Thanks for stopping by. I do plan to take him up on the offer, though, > The EFHW antenna is (in my opinion) a fad that continues because it Files with . He wants to know if there is a better way to have the loading coil so it would EFHWがなんでこんなに話題かというと、HFのほぼ全バンドでSWRが1. lhfw oyecad aopzl mdq vxxh norx ngljm wkkhqp olja lbmit