40m extended double zepp. Posted on August 30, 2009 August 31, 2020.
40m extended double zepp article originally published in arrl compendium by n6lf revisits the classic double extended zepp to improve pattern and swr bandwidth the dezepp is essentially two end fed collinear dipoles . By adding two small capacitors, made from short lengths of RG-8, in just the right place, the pattern can be improved and the driving- point impedance changed from reactive and narrowband to resistive and wideband. Listed under the Antennas/40M category that is about Antennas for 40 meters band. May 11, 2019 · But on 20 metres (14 MHz) the 25 metres is 1. One of these was the one for the CW station. It has been recommended that coaxial cables are not the type of feeder to be used for a double extended Zepp antenna. It can be fed with ladder line from the center insulator to tuner or it can use an impedance Aug 31, 2020 · The 40M Extended Double Zepp. Jul 17, 2010 · The Extended Double Zepp (EDZ, sometimes also known as Double Extended Zepp or DEZ) is the same, but the wires are now 5/8 wavelength instead of 1/2. 5 ft. 49dBi @28 deg (11. 2X!!!) Gain of 560 ft long horizontal loop 70 ft high on 20 meters: 12. 170 foot Double Extended Zepp Antenna. Interestingly, the EDZ can also be viewed as two collinear elements, each roughly 0. A second <Print Screen> will combine this information with the input values for a complete record. Double Zepp. This antenna is basically two 5/8 wave antennas end to end. 64 Feedpoint ~ 140 ohms Open Wire Line Total Length (BOTH ELE) = (984/f ) x 1. 3 %âãÏÓ 13 0 obj /Linearized 1 /O 15 /H [ 939 222 ] /L 139908 /E 113054 /N 3 /T 139530 >> endobj xref 13 25 0000000016 00000 n 0000000847 00000 n 0000001161 00000 n 0000001316 00000 n 0000001543 00000 n 0000002113 00000 n 0000002335 00000 n 0000002563 00000 n 0000002806 00000 n 0000003257 00000 n 0000003698 00000 n 0000003747 00000 n 0000003786 00000 n 0000007059 00000 n 0000007291 Nov 11, 2024 · Drills PDF storage googleapis com. So let’s imagine an EDZ for 40m. If one should feel it necessary, a 1:1 Balun would do the job. The performance characteristics are quite outstanding. The 40M Extended Double Zepp North Fulton ARL Who Needs a Beam W5DXP com May 11th, 2018 - Performs well enough on 40m and is rotatable 8 Extended Double Zepp A 1 25 wavelength dipole giving the maximum broadside gain possible from a dipole''An Improved Double . 8 dbi at a 40-degree take off angle with maximum gain directly over head. May 29, 2018 · I wanted to replace the relatively short fiberglass over galvanized steel center support for my 40M extended double Zepp (edZ). Extended Double Zepp NVIS Antenna Calculator. Dec 23, 2024 · Stretching the dipole further to an extended double Zepp (EDZ, or 2 x 5/8 waves) gives 3 dB over a dipole, but the beamwidth is only 37 degrees, which limits the ability to work stations off the main lobe. it does out perform a dipole for 40m and 30m. Sep 14, 2022 · Gain of an extended double Zepp (88 feet long doublet on 20 meters 35 ft high): with average ground: 10. By Jim Streible, K4DLI SK. net. 5 MHz) Extended Double Zepp with a 450- stub match system for a 50- feedline where the EDZ models a feedpoint impedance of 141-j694 . An automatic tuner should tune this antenna with no problem. The 40M Extended Double Zepp By Jim Streible, K4DLI There were many new and somewhat unfamiliar antennas used at this year’s NFARL Field Day. The Double Zepp (Doublet) antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. Yet, many amateurs still do not know much about it. This is significant enough to try it. So far it received 2 votes for a total score of 10. This double extended version provides 3 db gain over a dipole on the band it is designed for and each side or leg is about 5/8 wavelength long. a dual bander for 80m and 40m an extended double zepp edz is a 5 4 wavelength center fed dipole this article will introduce the half extended double zepp hedz which has characteristics that a lot of amateur radio operators should find quite interesting. Gain on 160 is about 2. The formula for figuring a 5/8 wave per leg is ” A = 600 divided by the frequency in megahertz . The Wire Size can range from 16 AWG to 12 AWG. Jan 21, 2025 · This 20 Meter Extended Double Zepp (EDZ) antenna should produce a 3-dB over the average half-wave dipole. Unlike typical antennas, this is a non-resonant antenna. it plays well with gain from 20m -6m. A Double Extended Zepp is a 3 db gain antenna . The tricky part of this antenna is now the length of the feeder. 64 wave length elements fed in phase. The double extended Zepp is a dipole type Antenna consisting of two collinear 0. The antenna is a 10-meter (28. thanks chuck 16,40 M 8el OWA 12,71 DBi; 16,68 M 8el OWA Yagi 12,7 dBI; 17,76 M 8el F-Yagi 13,3 dBi; extended double zepp. Feb 18, 2024 · Double extended Zepp antenna can be considered as a 1. The telescoping fiberglass mast from Max-Gain is very nicely made. 9dBi at 12 degrees (19. 25 wavelength, forming an extended double zepp there. 64 l0. But, unlike the horizontal flat top known to most of us, each antenna element is 5/8 of a wavelength long, which produces a gain of approximately 3 dB over a dipole at the same height. The formula for figuring the matching stub is ” B = 103 divided by the frequency in megahertz . 850 MHz) 80M: T = 354 ft 10 in (3. The resource has been on our site since Friday Jan 3 2014, and it has been viewed 1152 times. Similarly the half size 12. 5m (44 ft) version would be an extended double zepp for 10m metres (28 MHz). if anyone has any interst in this double extended zepp,please send a e-mail to n4ued@arrl. The larger the wire, the wider the bandwidth. Center height 57. It covers 7 bands, 10-12-15-17-20-40-80m. 25λ). 550 MHz) The following article uses 40 and 80/75- meter double extended Zepps (DEZepp) as examples of what you can accomplish. 62-0. A Double Zepp is a center-fed 1/2 wavelength antenna. Extended Double Zepp with Formula and 80/40 numbers Extended Double Zepp E:\HR\ANTENNAS 1 of 1 n/a 1. , 23 cm, 30 m, 40 m, 6 m, 70 cm, 80 m The MFJ-1742 is center fed wire antenna that, when properly erected and fed with balanced feedline, will give up to three decibels (dB) power gain on the 20-Meter amateur band, along with directivity broadside to the antenna. this antenna is the cats meow on 10 meters. 0 99 08 06 Extended Double Zepp with Formula and 80-20M numbers 0. 40 meter Double Extended Zepp eHam net Home. Jerry Haigwood, W5JH he extended double Zepp (EDZ) antenna has been around for a lot of years. The measurements below are for building a Extended Double Zepp Near Vertical Incident Skywave (NVIS) Antenna. 64 Extended Double Zepp NVIS Antenna Calculator. A sample double screen printout appears in Fig. I had two goals: make it higher and make it non-conductive - simplifying the routing of the ladder-line feed. Achieving gain by stacking antennas maintains a wider beamwidth, but requires more height to focus on low angles. Used for CW station at the 2009 Field Day by the North Fulton Amateur Radio League. Listed under the Antennas/End-Fed category that is about End-Fed Antenna. 5X!!!!!) 6 Dec 14, 2013 · The double extended zepp looks like a conventional halfwave dipole fed in the center with 300 or 450 ohm feed line. The antennas design frequency is 40-meters. this was done local as well with dx stations. 15. The EDZ is an excellent, easy to build, wire antenna that produces real usable gain with Jan 21, 2025 · 40 meter band antennas projects category is a curation of 233 web resources on , The 40M Extended Double Zepp, A comparison of 40 meter beam antennas, 40 m Wire 4 Square Vertical Array. In addition, with a proper antenna tuner it will also give good results on all amateur bands f %PDF-1. extended double-zepp-11-meter. Resources listed under 40 Meter Antennas category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. its nothing short of amazing on 10m. Mar 11, 2024 · A popular choice for radio enthusiasts since 1938, the Extended Double Zepp (EDZ) antenna boasts an impressive gain advantage over traditional half-wave dipoles. 25 wavelength long wire, fed at the center with an open wire transmission line and a tuner at the transmitter end. Posted on August 30, 2009 August 31, 2020. 00/10 Last updated: 2022-12-15 The Extended Double zepp Revisited A vintage favorite still makes great single or multiband antenna. Dec 5, 2024 · The measurements below are for building a Double Extended Zepp Near Vertical Incident Skywave NVIS Antenna. 28 MHz 160M: T = 680 ft 10 in (1. Basically, the Extended Double Zepp Antenna is a pair of 5/8 wave elements Antennas/40M; The title of the main category is 40M and it deals mainly with 40 meter band antennas projects. This is achieved by its extended length of approximately 1¼ wavelengths (1. Paul N8ITF gives you the measures for all versions of the EDZ. qqbsqhbeskxnzwcahdhxtboqwgsjdqyeascenvokpvziniasr