Perhaps the most popular multi-band Windom or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. Most antenna tuners work best into moderate to high impedances, rather than low impedances. It had the same dimensions as the VS1AA multiband Windom antenna, but fitted with a 300Ω balun in its feedpoint and fed over coax. This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. Fritzel FD4 antenna, described by the late Dr. Dat is op de laagste frequentie een draad van een halve golflengte. L'antenna WindomAntenna short 25ft off centre dipole OCD tied to balcony rail 15 feet high sloping down to 8 feet into hibicus bush. I'm just afraid that if we install a PayPal box at the LoTW page, paying can become mandatory before QSL-ing. that's not what I'm trying to explain. . Hi all, I bought the Mini1300 from China and Software says Version1. adding two wires to the basic FD4, 4. 8 - An antenna system for 7, 14 and 21 Mc. in JO62PL. Belakangan, karena di feed di titik yang melèncèng dari tengah bentangan antenna (OFF-center) seperti yang kemudian umum dilakukan, maka rancangan ante nna macam ini lantas disebut sebagai off-center fed atau OCF antenna. Very close to the 300 Ohm impedance of a Windom antenna such as the system used in Fritzel's FD3 and FD4 antennas. I did follow the instructions and entered my Call and Locator, selected port S1 and connected FD4 antenna but nobody does receive me. 7-m in the 1960s. The main category is Windom antenna that is about Windom antenna links. German Old-Timers immediately recall the well-known Windom antenna that Kurt Fritzel, DJ2XH, under the name FD4, brought to the German market in the early 1970’s (still available today by hofi, w . Slavek carried the Icom IC-706 in aluminium case together with antenna tuner, paddle, computer, FD4 antenna with 20 metres of coaxial cable and a power. WINDOM. It was designed to cover 80, 40, 20 15, and 10 meters. The NRF24L01 module works with the help of SPI communications. BEST LONG-RANGE: Five. Name: Fritzel FD4 HAM radio antenna. ANTENNAS. Add a comment. -V 80. ic7800 @ 100w microkeyer ii - heil proset elite - cushcraft r6000 and fd4 antennas - n1mm logger. THE OCF FD4 (FD3) WINDOM ANTENNA 19 may 2011. HamSphere 4. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4. See you again, friends . 38m) split. Fritz Spillner, DJ2KY, in 1971. Operating HamSphere 4. We would like to show you a description here but the site won’t allow us. com and other authorized dealers (except Xiegu). Also, why every house should have an emergency way of listeni. The J Pole HANDBOOK 1 of 15 8272007 8:18 AM Serving HAM Radio since 1959, On the Web Since 1995 Order Toll Free Monday through Friday,…Of course this will only help hams/dxpeditioners with net access or credit card accounts. Watch on. incl. Its main advantage was that it could easily be matched to a tube transmitter. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer. This is a pity, because most hams would put up a wire antenna especially for the lower bands where beam antennas are more difficult to erect. Antenna Windom Links → . Topic: Dipol - FD3 - FD4 (Read 3108 times) 0 Members and 1 Guest are viewing this topic. During his spare time from the contest he will try to work some PSK31, especially on 30m band. PWR TRAPS 4 cm Ø. Equipment will be similar to September 2011 WAE SSB Contest work, with the Kenwood TS570D and Windon FD4 antenna. 2 and 9. The Windom - Off Centre Fed Half Wave Dipole Antenna EN English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian český русский български العربية Unknown RUMORS OF THIS ANTENNAS DEATH ARE GREATLY EXAGGERATED Time Owned: 0 to 3 months. 5m and 2. Vertical antennas made of steel wire, monoband or multiband, with balun and radials. IDK about 160m, i don't have antenna for that and when i look, it's pretty dead. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end. Part Number: MFJ-1779A. Operating HamSphere 4. A shorter version FD3 for 40-10m operation is also developed. First trim the dipole for resonance at about 3. HamSphere is a highly realistic shortwave simulation based on SDR (Software Defined Radio) technology. 25 10. The 4-band Fritzel model FD4 is a special version of a Windom antenna. FT-7's PB-1631 B was modified according to FT-7B's PB-1631 D. 6 band windom anten 80-40-20-17-12-10m Let's make an antenna so that it is easy, inexpensive, no material problem, working in every band and efficient. Vous connaissez les FD4/FD3 ? vous connaissez les loop ? vous connaissez les halo ? je vous propose sur une idée de G8ODE , dérivé de l'antenne "Cola" l'antenne "OLA" pour Open Loop Antenna (feed off center) The renowned “FD4” antenna was not an exception; Have a look at its VSWR specification on pages 13 and 14 of this brochure. G5RV. . Above, Straw's diagram of the Carolina Windom. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. Produce baluns, delta loops, dipoles, ocf antennas and more. But for a "real" FD4 the RF transformer should have 4:1 or as some say 2:1 when the height above ground is small. This link is listed in our web site directory since Wednesday May 6 2009, and till today " W9INN dipole antenna " has been followed for a total of. By serendipity, it also covers the 17 and 2 meter bands. Download the model according to the specified sizing parameters in either 3D or 2D format. 5. 1st xmission 15 dB above city noise level, 2ns xmission abt 10 dB. Source for Fritzel Antennas? 10. Rather than feeding the conventional 33%/67% we like the 29%/71% feed point wherein the feed point is 21% from one end and fed with a 4:1 OCF Current balun with built in feed line choke1971 - Dr. 8-m and 27. The dual dipole wires do the job of providing guying support for the mast. *Note: The FD4 Windom is a 300Ω balun-fed antenna with lres = 41. It will match on even and odd harmonics - but it. Final Clearance. Furthermore, none of these designs offered 30 m. 2. I myself am working with a simple FD4 Antenna. This trademark application was filed with the USPTO (United States Patent and Trademark Office) under the trademark classification: Computer Product, Electrical &. is the designer and trade mark holder, and primary source for Bury-Flex Tm low loss coax cable. America. Most tuners would work better if the balun passed the line impedance through without stepping impedance down. De antenne wordt op eenderde van zijn The second leg is the "counterpoise". , DJ2KY modified the VS1AA antenna design by replacing the single feed wire with balun and a coax feeder. com in a single category. This link is listed in our web site directory since Monday Oct 19 2009, and till today " The Cobra antenna " has been followed for a total of 1493 times. << serial ‘ngobrol-‘ngalor-‘ngidul ihwal per-antenna-an bersama bam, ybØko/1 >>. power 1 kW, approx. I just checked my EU1KY Analyzer on the spectrum analyzer. Fritz Spillner1, DJ2KY, in 1971. The asymmetrical dipole antenna developed and described by Windom (W8GZ) in 1929 has been used by many amateurs for many years as the FD4. The sectional mast is a low-loss coaxial feed line for unequal length crossed dipole radiating elements which are attached to guy ropes for mast support. KEY 1. ZS6BKW ANTENNA 22-may-2022. By 1937 the Windom was described “as multi-band antenna that can be employed on harmonically related 160, 80, 40, 20 and 10m bands with acceptable levels of VSWR”. 6 288 29. D. And the length of the legs must match. Fritzel antenna manufacturer address. You have tried to build an FD4 antenna which is no bad solution at all. power 1 kW, approx. The old Y-Calls had to change in 1992 and I got DL1JBQ. Operating HamSphere 4. t to. 7-m in the 1960s. The renowned “FD4” antenna was not an exception; Have a look at its VSWR specification on pages 13 and 14 of this brochure. About The FD4 Windom antenna The resource is currently listed in dxzone. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk. The Off-Center-Fed-Dipole – also called a “Windom” by many companies selling them – has a somewhat blemished reputation amongst amateur radio operators. But since the most common and simple design is a trx-coaxial antenna, let’s talk about such an antenna design . The dual dipole wires do the job of providing guying support for the mast. This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. This is a pity, because most hams would put up a wire antenna especially for the lower bands where beam antennas are more difficult to erect. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end. antenna. Ethott , WA5NVI. 68. The 4-band Fritzel model FD4 is a special version of a Windom antenna. Homemade Carolina Windom antenna. If the installation site permits, a dipole antenna in a vertical "Vee" configuration has radiation patterns suitable for NVIS applications -- and can have useful low-angle radiation, as well. Hi all, I bought the Mini1300 from China and Software says Version1. Unlike the endogenous expression of the fd4/fd5 genes, the C element is not restricted to the ventral imaginal discs (legs and antenna), as activity of this CRM is also observed in the wing disc. . . 453. PolyStealth Tm high strength PE insulated antenna wire, and Flex-Weave Tm wire. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end. Furthermore, none of these designs offered 30 m. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. Le petit plan de masse est trés pratique "radians courts" :gain de place au sol par rapport aux radians d'une verticale 1/4 d'onde. • Radioddity's limited warranty applies to all BRAND NEW items sold by radioddity. . It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in. $99-199. Fritzel used the shown dimensions of 13. com. Since it is not possible during the local conditions (small premises with a central standing family house in a suburban area) to have a single tower with a big beam I was beginning to watch out for a more suitable (more "compact") antenna. Antena ta charakteryzuje się szerokopasmowością (1:6) oraz dużą odpornością na zakłócenia. 6625 114 DCS Clovis PD7 Public Works . > I also know about the 6:1 balun but am looking for some info on the > overall length and the point of fed also the angle and height of the > ends of the antenna above ground. . This link is listed in our web site directory since Tuesday Jul 22 2008, and till today "The FD4 Windom antenna" has been followed for a total of 3736 times. WINDOM ANTENNA. isolators. a Windom (FD4) antenna I liked to satisfy my wish in having a beam antenna usable in the the upper bands. For the PAL-OCF8010 with 250 feet of RG213 feed line and an average height of 30 feet: Palomar Engineers PAL-OCF8010 Antenna manual 05242021 29. If the installation site permits, a dipole antenna in a vertical "Vee" configuration has radiation patterns suitable for NVIS applications -- and can have useful low-angle radiation, as well. Add to Cart Details. What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4 antenna, described by the late Dr. I0JXX 432 MHz Yagi antennas. 8-m and 27. I improved my setup with a FT920, 3 el Monobander for 10m and made Packet Radio in 1997. A shorter version FD3 for 40-10m operation is also developed. WINDOM. The antenna is completely assembled and no adjustments are necessary, just screw in your coax and raise the antenna asThe Winegard Elite 7550 is the smart option and the best TV antenna for outdoor installation. 205 - Collinear Antenna Gain=3dB for 2m. hofi de) . com. It is an off centre fed dipole, with 10 feet of vertical radiator. on air on 17 meters ,with 30 watts and fd4 antenna. . I'm just afraid that if we install a PayPal box at the LoTW page, paying can become mandatory before QSL-ing. WINDOM. Fritzel FD 4 Multiband Antenna Reviews Home Reviews For: Fritzel FD 4 Multiband Antenna Category: Antennas: HF: Verticals; Wire; Loop eMail Subscription Registered. rig is a codan 2110v 25w fd4 antenna 15ft above ground yyyy, ur station is amazing! do u qsl js8. I was using only 30 wtts and FD4 antenna and enjoyed vy much, 73 to all . 8-m and 27. This split allows the OCFD to be operated as a 4 band antenna as the SWR on the 40m band is less than 3. In stock, shipped in 1 to 2 days. • Radioddity's limited warranty applies to all BRAND NEW items sold by radioddity. The antenna consists of asymmetrical length horizontal. Please select a product. Added: 07/18/2019. Fritz Spillner, DJ2KY, in 1971. name xxx qth winterthur near zurich this is my first qso on js8, funny . I found some people to call the coax fed antenna with a balun "FD4" - but some other people call FD4 the modification mentioned by Franco IK1OWB (but the measures are doubled: 9. Fritzel. jpg (228. The wires are installed in an inverted-vee configuration from the top of a 4. 6. In the total length of this antenna is 41m, height is about 11m, and diameter of element is 2mm. Also watched the livestream on Youtube Looking forward fo christmas this year. Hi all, I bought the Mini1300 from China and Software says Version1. The equipment is an RFzero directly into a 1:9 UNUN. During experiments with for example FD3 and FD4 types, I had noticed that there was a "Windom" point at a length of about 27 m. Antenna made of soft PVC insulated HO7 V-K 4 wire. This ATU, I call my design FRI-Match, has been devised in 1972 as an unbalanced tuner for improving the SWR at the transmitter end of coaxial feeders to resonant antennas (eg verticals, dipoles, trapped dipoles, G5RVs, Yagis, loopquads etc. We discovered in an. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. But it was over water, the villa pool hi. The half-size version is known as the FD3 40-20-10m antenna. Our new portable Dipole antenna set with mounting kit. But for a "real" FD4 the RF transformer should have 4:1 or as some say 2:1 when the height above ground is. Een bijzondere vorm van een Windom antenne is een FD4 van Fritzel. Now, how was a Windom antenna developed? It began with a center-fed, half-wave dipole. 6-Band Windom antenna - Theory and construction of a novel trapless center-loaded off-center-f. It is a long half wave on the lowest frequency and is powered by a coaxial cable through a transformer inserted in the wire to a third from one end. receivers, city env. The dimensions were the same as the multi-band Windom antenna, but fitted with a 200Ω (4:1) balun at its feed point and fed with 50 ohm coax at lower heights above the ground. Military AS-2259/GR There are a number of different NVIS antenna plans on the internet that can be adopted to amateur radio use. I suggest that new frequencies be promulgated, a few KHZ further away from FT8 on the popular bands , such as 40m, 20m 17m 15m. S. 5m and 2. Both of these proved toDe az FD4 nem egysávos antenna és a kábel már korábban felkerült a helyére. Regardless of how high the antenna is, a roof, especially a metal roof, will have a negative effect on the antenna pattern if the. I know this is an old thread - but Hofi in Germany still manufactures the antenna. This antenna also works fairly well on all odd harmonics, The asymmetrical dipole antenna developed and described by Windom (W8GZ) in 1929 has been used by many amateurs for many years as the FD4. > To: <ARRL-LOTW@. Dari sinilah lantas lahir legenda yang menyebutkan antenna Windom sebagai antenna lembah atau antenna bantaran kali, seperti yang di tanah air di”wakili” oleh transmisi gahar dari OMThe Inverted-Vee tends to be more omni-directional and radiate equally in all directions. WINDOM. The dimensions were the same as the multi-band Windom antenna, but fitted with a 200Ω (4:1) balun at its feed point and fed with 50 ohm coax at lower heights above the ground. Dat is op de laagste frequentie een draad van een halve golflengte. 26 Inch High Gain Antenna (Original Baofeng GT-3/GT-3TP Antenna) 1 Year and 6 months Manufacturer's Warranty. Fritzel FD4 OCF Dipole Fritzel FD4 OCF Dipole The Frizel FD4 Windom is an OCF (Off Centre Fed) antenna that has been around for a long time. A FD4 multiband HF Antenna B. Operating HamSphere 4. We discovered in an older periodical (QRV) the explanation by F. (5) Alpha Antenna HOA Buster for 10-80 meters. The ClearStream Flex is larger and pricier than the ClearStream Eclipse. Zmierzyłem się w końcu z demonizowaną przez wszystkich anteną T2FD, ale zacznijmy od początku. The half-size version is known as the FD3 40-20-10m antenna. 3 MHz. Operating HamSphere 4. But we are speaking about longwires here, not about an FD4. sierpnia 01, 2015. n Fig 28. HamSphere 4. 80,40,20,17,12,10m Seperate parts for balun, isolator, wires. The antenna can be employed on 80, 40, 20 and 10m with considerable, though acceptable levels of VSWR. Spillner (DJ2KY) that this antenna, with the addition of a small one-band Windom for 15 m, can be used. The half-size version is known as the FD3 40-20-10m antenna. Perhaps the most popular multi-band “Windom” or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. Délután 4-re már állt az FD4 antenna és az azt tartó pecabot. rig is a codan 2110v 25w fd4 antenna 15ft above ground yyyy, ur station is amazing! do u qsl js8. Svar til #1: Velkommen tilbage til denne fantastiske hobby. A shorter version FD3 for 40-10m operation is also developed. Unlike the endogenous expression of the fd4/fd5 genes, the C element is not restricted to the ventral imaginal discs (legs and antenna), as activity of this CRM is also observed in the wing disc. Rated 5 out of 5 stars. WINDOM. This link is listed in our web site directory since Sunday Jul 29 2007, and till today "Windom Antenna with 4:1 balun" has been followed for a total of 8010 times. Este diseño también presenta unos bigotes de gato para trabajar las bandas WARC y los 15m. , Corvallis, OR . Fritz Spillner1, DJ2KY, in 1971. The wire tails connecting to the Balun Bolts are just ordinary Philips Spades. This became known as the Fritzel FD4 (80, 40,20,10m) but is more correctly described as the Off Center Fed Dipole (OCFD). The renowned “FD4” antenna was not an exception; Have a look at its VSWR specification on pages 13 and 14 of this brochure. To: n4ujw@hamuniverse. 2. It had the same dimensions as the VS1AA multiband Windom antenna, but fitted with a 300Ω balun at its feed point and-fed over coax. DAVIS RF Co. 1x Radioddity RA-FD4 8. 1971 - Dr. The sectional mast is a low-loss coaxial feed line for unequal length crossed dipole radiating elements which are attached to guy ropes for mast support. 5dBdThe FD4 (FD3) Windom Antenna - The 4-band Fritzel model FD4 is a special version of a Windom antenna. Fritzel used the shown dimensions of 13. Anteny SP1BKS - Antenna manufacturer from Poland, produce dipole wire antennas, W3DZZ FD4 Windom and long wires, baluns, dealer for toroids and connectors managed by Leszek Mlynarczyk SP1BKSSubject: 20 meter antenna project. By the way, a German ham told me that Herr Fritzel, the company founder, passed away recently. 7 m werden in de zestiger jaren door Fritzel in zijn antennes toegepast. ( 3 ) Estimated Ship Date: Monday 11/20/2023. Other images. Displaying 1 to 8 (of 8 products) Result Pages: 1. 73 to all FT8/FT4 Digital Modes Group (Welcome To All Licensed HAM) | on air on 17 meters ,with 30 watts and fd4 antenna. I myself am working with a simple FD4 Antenna. Short video of 40m swl :) Thanks for watching my HAM radio videosBANG FOR THE BUCK: Pingbingding Digital Amplified Yagi HDTV Antenna. I still young so I thinks this is normal, didn't we all start small. Time Owned: 6 to 12 months. 1. Fritzel used the shown dimensions of 13. While most of the antennas were made by "name" manufacturers, the Gesobyte and the Btfdreem were chosen specifically. America. 206 - X-Ray Monoband Antenna Gain=6. The main category is Windom antenna that is about Windom antenna links. I asked my landlord for the possibility to fix one end of it on his house. Fritz Spillner, DJ2KY, in 1971. If you find my channel informative and entertaining, I hope you will consider joining my support group by c. 3V microcontroller or a 5V microcontroller but it should have an SPI port. Added: 07/18/2019. I set mine up as an inverted V, and swr is fine on all bands, but is very low at the bottom ends of 80 and 40. Add to Cart. Fritz Spillner, DJ2KY, in 1971[1]. Tether for side kites 7. VU2NSB OmniDX antenna (11m) VU2NSB OmniDX Antenna series is a very s. 73 to allWINDOM ANTENNA. antenna systems are easily carried and installed by two people in less than 15 minutes. This kind of antenna uses splash plate feed based on ring-focus antenna. Also: Someone asked if there was any usefulness of FT8. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end. . America. Modified: 11/26/2021. It comes complete with a 1:6 balun with. Ne postoji dobro multiband rešenje. HamSphere 4. This antenna originated from darc QRV magazine in 1971 should be attributed to DJ2KT, works on 80 40 20 10 meters without ATU, based on the. I hope you enjoy this video and find it helpful. “FD4” 4. Rating & Comments (0) Tags (7) Alternate Versions. Just need an antenna. The wires are installed in an inverted-vee configuration from the top of a 4. The FD-4 is still made with outstanding quality of materials. Installation de l'antenne filaire FD4 de chez Fritzel sur un pylône de 6 mètres en V inversé la rendant omnidirectionnelle. The dimensions were the same as the multi-band Windom antenna, but fitted with a 200Ω (4:1) balun at its feed point and fed with 50 ohm coax at lower heights above the ground. The wire antenna is the classic amateur radio antenna. The store where radio amateurs and specialists buy Everything from one source Fast delivery Excellent support See for yourself!The G5RV has a reasonable SWR on 80, 40, 20, 15, and 12 meters. com in a single category. 9 - A possible 40-meter beam arrangement using quarter-wave folded elements. Description: Fritzel FD4 HAM radio multyband HF antenna. 2002 - 2023 i1wqrlinkradio. Hi all, I bought the Mini1300 from China and Software says Version1. Add To Cart. T. Latin America. Fritzel FD4 antenna, band 80, 40, 20 & 10M plus 17 & 12M 13. I still young so I thinks this is normal, didn't we all start small. America. For best results with this type of antenna, the Apex Angle should be kept between 70 and 110 Degrees . Other projects I would like to to : Build me a G7FEK antenna; Build a end fed half wave 20m vertical. In addition to the wire antennas, in Europe they sell a line of yagis and verticals, and are well respected. This became known as the Fritzel FD4 (80, 40,20,10m) but is more correctly described as the Off Center Fed Dipole (OCFD). Add to Cart Details. 52m long ( TT, October 1972 and ART): Fig 5. Can someone point me to or post the latest Olivia Dial frequencies with 1500 offset? Everywhere I look, I see something different. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. Vous connaissez les FD4/FD3 ? vous connaissez les loop ? vous connaissez les halo ? je vous propose sur une idée de G8ODE , dérivé de l'antenne "Cola" l'antenne "OLA" pour Open Loop Antenna (feed off center) une FD4/FD3 a une impédance de l'ordre de 200/300 ohms , si cette antenne est replié en triangle ou carré son impédance descends. post 26 Apr 2023. This first video is by a beginner for beginners! In an unc. Multiband FD-4 Windom antena. 0m and lshort = 13. $1,909. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end Longwire antenna basics basic notes on building longwire antennas for medium waves 6-Band Windom antenna The FD4 (FD3) Windom Antenna - The 4-band Fritzel model FD4 is a special version of a Windom antenna. As low as: €75. Windom antennas for shortwave, with 1:6 balun and isolators, 200 or 1000 W. Both of these proved toA special form of a Windom antenna is a FD4 from Fritzel. Baldur Drobnica will be active from Hargeisa, Somalia until 6 June 2018, as 6O0X. Antenna Part#: PAL-OCF1606 OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center. The half-size version is known as the FD3 40-20-10m antenna. 5-70. New. I…However although the antenna wires are strain relieved at the Balun. The diagram gives no guidance on key implementation details such as height, and the nature of the common mode. Fritzel used the shown dimensions of 13. S. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. A kada ima problema sa napajanjem, onda su problemi sa komšijama verovatni . The antenna was designed for military use from 2 to 10 MHz (some references say 2 to 30 MHz). My antennas - Hrvatski Radioamaterski Savez FD4 - Windom antenna | MyHam. 00.