that's not what I'm trying to explain. 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. To: n4ujw@hamuniverse. Its main advantage was that it could easily be matched to a tube transmitter. Once you download and install this software you will get a basic working transceiver for a trial period. VSWR performance is worse only on 17m and slightly on 40m. But we are speaking about longwires here, not about an FD4. America. En FD4 er en glimrende antenne, opsat inverted vil du opnå en lavere udstrålingsvinkel, altså bedre til DX. Name: Fritzel FD4 HAM radio antenna. 6O6X. 3V microcontroller or a 5V microcontroller but it should have an SPI port. 7-m in the 1960s. This can overload the receiver, especially on 40 m here in Europe, with a lot of broadcast stations. De antenne wordt op eenderde van zijn The second leg is the "counterpoise". Hi all, I bought the Mini1300 from China and Software says Version1. 55 m dipole fed with a 8. Coaxial Cable P R O D U C T S P E C I F I C A T I O N LDF4-50A Standard coaxial cable, 1/2", 50 ohm foam HELIAX (Wideband from 0. The 7-band antennas need at least 120 feet of ground space end-to-end. What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4 antenna, described by the late Dr. He is currently only using 100 watts and a FD4 antenna. Len Carlson, K4IWL. The plot shows the current distribution on a 42 m long FD4 Windom antenna for the frequencies 80, 40, 20, 17 and 10 m. TA4AU. com in a single category. Assuming the specified sizes: dipole half + feeder length = 26 to 27 m, the impedance at the beginning of the ladderline offers a suited impedance for common. It is an off centre fed dipole, with 10 feet of vertical radiator. As at the way things are now all that will happen is Olivia will get a number of FT8 stations annoyed. 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. Fritz Spillner1, DJ2KY, in 1971. The second leg is the "counterpoise". 5 PL Clovis FD1 Fire Dispatch. The half-size version is known as the FD3 40-20-10m antenna. 0, but I wonder how to send WSPR or FT8. Both of these proved to FD4 (80/40/20/10 m) The 4-band Fritzel model FD4 is a special version of a Windom antenna. 5 méterre volt. The main category is Dipole antenna that is about Dipole antennas plans. Opinions sought on Fritzel FD4. 5-70. T. 8-band antennas need 239 feet of ground space end-to-end. 7-m in the 1960s. FD-4 antenna 3. 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. Actually I could not get out of Europe on it. $99-199. Operating HamSphere 4. WINDOM. So I checked the frequency and had to adjust it (27MHz calibration) But still. I was able to get an excellent deal on a lightly used IC-718 that includes a tuner and power supply. A Double Windom Antenna for Eight This which originally appeared as two articles in cq-DL, was translated from the German by Dr. Mange kortbølgeamatører har glæde af en FD4. This trademark application was filed with the USPTO (United States Patent and Trademark Office) under the trademark classification: Computer Product, Electrical & Scientific. Mike has also erected a 20m high vertical for 80 and 160 meters and a 8 element LP for 20-10 meters. A wire antenna dipole is inexpensive, light and - depending on local conditions - can be. 75 MHz. While the G5RV requires an antenna tuner, it is very efficient on at least 5 bands. 36 . The GPA-30 trap was used because water often seeps in with an R6000 trap and the construction is not as robust as that of Fritzel antennas. 52m long ( TT, October 1972 and ART): Fig 5. Antenna, 160 Meter Single Band Wire Dipole, 1500 W, SO-239, Kit. 249. S. The antenna is off center fed with a matching network and is mounted next to an insulator of fiberglass and polyester resin. This has also been the case in Germany. The Fritzel FD4 antenna becomes more popular in Europe and N. Hobart FD4/150-3 Commercial Garbage Disposer with Adjustable Flanged Feet - 1 1/2 hp, 110-120/220-240V. Ashok Use your search engine to find 'FD3 antenna' and 'FD4 antenna' - I see many hits. Fritz Spillner, DJ2KY di tahun 1971dan diproduksi secara komersiil dengan nama Fritzel. This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. Odg: Multiband FD4 antena. Bandwith 150Hz. Also called "OCF", Off Center Fed dipole. Therefor I hung up a Fritzel FD4 a while ago. . i missed the russian stations!! oq5m: on5zo or6t: oq4u on5xx on4qj or7r: on4lg ot2j: ot2j on6ix on7vg on3daf pa0rsm first time uba contest: pa3cgj not so many time to participate. Furthermore, none of these designs offered 30 m. 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. Fritzel Antenna Source? 7. Ne postoji dobro multiband rešenje. 7-m in the. Antennas such as G5RV with balun, W3DZZ, FD3 and FD4, trap verticals and Yagis can be easily adjusted with a FRI Match. You have tried to build an FD4 antenna which is no bad solution at all. Ožujak 2004, 14:46:50 ». At 8mA I am able to achieve 27dBm of output (500 mW) at 144MHz. FD4's are by wide ranges. Fritz Spillner, DJ2KY, in 1971. A shorter version FD3 for 40-10m operation is also developed. Ultra Vizion HD Digital TV Antenna: $44. 6m directional antennas with 5, 6 or 7 elements, 1 kW. Fritz Spillner1, DJ2KY, in 1971. It turns out that 100 feet of line is within about 10% of the idea length to match the antenna to 50 ohms on all amateur bands. In addition the T2FD has some attractive properties in terms of noise reduction, which some long wires / dipoles and ATU combinations are susceptible too. 8-m and 27. I suggest that new frequencies be promulgated, a few KHZ further away from FT8 on the popular bands , such as 40m, 20m 17m 15m. pc is a toughbook cf19 wx is quit good,strong winds, 9 xxxx & yyyy are the names of the two participants. I'm just afraid that if we install a PayPal box at the LoTW page, paying can become mandatory before QSL-ing. 0, but I wonder how to send WSPR or FT8. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. But we are speaking about longwires here, not about an FD4. At this moment, though, I don't remember if I used WSPR or FT8 to test with. 70cm directional antennas with 16 -. Vertical antennas made of steel wire, monoband or multiband, with balun and radials. Only good results on 80 and 160 meter bands in combination with a MFJ 969 de luxe versa antennatuner. Ona je dugačka pola valne duljune L. « u: 31. The FD4 (FD3) Windom Antenna The 4-band Fritzel model FD4 is a special version of a Windom antenna. This antenna was developed in Germany, although others likely advanced it also. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. This first video is by a beginner for beginners! In an unc. The end-fed energy is less than the center-fed. 201 - FD4 Windom Antenna for 80m, 40m, 20m, 10m. Both of these proved toNear vertical incidence skywave, or NVIS, is a skywave radio-wave propagation path that provides usable signals in the medium distances range — usually 0–650 km (0–400 miles). 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”. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. That is a wire of half a wavelength on the lowest frequency. When the dipole is installed horizontally, at about one meter (3-4 feet) above ground, you effectively get a NVIS low-noise dipole. It was designed to cover 80, 40, 20 15, and 10 meters. The NRF24L01 module works with the help of SPI communications. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. com in a single category. • Radioddity's limited warranty applies to all BRAND NEW items sold by radioddity. The Fritzel FD-4 was designed by He. And the length of the legs must match. com Hex Beam Base Plates, Mastrant. fd4_hg7wav. America. 0 Extras: Using the Editor to Customize Your Transceiver. post 26 Apr 2023. 8-m and 27. G5RV. 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. America. pc is a toughbook cf19 wx is quit good,strong winds, 9 xxxx & yyyy are the names of the two participants. 1971 - Dr. 0, but I wonder how to send WSPR or FT8. 6625 114 DCS Clovis PD7 Public Works . This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. About Windom Antenna with 4:1 balun The resource is currently listed in dxzone. The Windom (also called "OCF", Off Center Fed) antenna is one of the most popular wire antennas for radio amateurs. A shorter version FD3 for 40-10m operation is also developed. be Multiband Delta Loop (W2EGH) | MyHam. 7 Mllz arc available if the high fre- quency is directly coupled out. a Windom (FD4) antenna I liked to satisfy my wish in having a beam antenna usable in the the upper bands. 73 to all FT8/FT4 Digital Modes Group (Welcome To All Licensed HAM) | on air on 17 meters ,with 30 watts and fd4 antenna. The Windom - Off Centre Fed Half Wave Dipole Antenna. rig is a codan 2110v 25w fd4 antenna 15ft above ground yyyy, ur station is amazing! do u qsl js8. > To: <ARRL-LOTW@. EN. Coax extension2020-06-21 : Tried 6 m with my IC-7300 and a FD4 antenna. The resource is currently listed in dxzone. By the end of the 70's interest in the Windom. isolators. A rádió tőle kb. ASUS AX3000 Dual Band PCI-E WiFi 6 (802. 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. Free Shipping. This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. 6. Allows you to more easily get the antenna up high and outside. 110/220 Volts. Add to Cart Details. I was using only 30 wtts and FD4 antenna and enjoyed vy much, 73 to all . 204 - Low Radiation Angle Full-Wave Loop Antenna for 80m. 4 (MHz)Fritzel FD4 antenna, described by the late Dr. The Off-Center-Fed-Dipole – also called a “Windom” by many companies selling them – has a somewhat blemished reputation amongst amateur radio operators. 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. OCF, FD4, FD3 (WINDOM) ANTENNE Met foto's, tekst en tekeningen. Regardless of how high the antenna is, a roof, especially a metal roof, will have a negative effect on the antenna pattern if the roof is 1/8 wavelength away or closer. also works on the 80 and 160 meter band. The 4-band Fritzel model FD4 is a special version of a Windom antenna. Fritzel FD4 antenna, band 80, 40, 20 & 10M plus 17 & 12M 13. 1. balun, incl. New Carolina windom antenna - PDF file by QRP Expressions by By N. The following plot shows the measured SWR of an FD4 antenna from 3 MHz to 30 MHz with about 20 m of RG58U feeder line. *Note: The FD4 Windom is a 300Ω balun-fed antenna with lres = 41. Do long wires work better than say a standard half wave or quarter wave antenna?Ask an Elmer discusses this very interesting question by one of our viewers. 200 - Inverted-V Beam Antenna for 30m. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk. 0: We discuss Antennas, DX'ing, Calling CQ, and other Topics. 1971 - Dr. For the PAL8010OCF, the impedance is very well behaved in a limited, easy to match range throughout the 1-54 MHz range and, in fact, that antenna also works very. Free Shipping. 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 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. The half-size version is known as the FD3 40-20-10m antenna. The half-size version is known as the FD3 40-20-10m antenna. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. sierpnia 01, 2015. It is a half-wave long on the lowest frequency, and is fed from a coax. A FD4 multiband HF Antenna B. A shorter version FD3 for 40-10m operation is also developed. 7 Mllz arc available if the high fre- quency is directly coupled out. 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. Len Carlson, K4IWL. But for a "real" FD4 the RF transformer should have 4:1 or as some say 2:1 when the height above ground is. I still young so I thinks this is normal, didn't we all start small. Perhaps the most popular multi-band Windom or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. T. Also, a power amplifier, L4B, is on the way to Baghdad. The windom antenna can also be hung as a. I recently purchased the 5KW FD4 from an MWF-SERVICE. The wires are installed in an inverted-vee configuration from the top of a 4. Fig. FT-7's PB-1631 B was modified according to FT-7B's PB-1631 D. All groups and messages. What we know. The fundamental ideaWith some very old antennas the traps of radiator and director are equal. It had the same dimensions as the VS1AA multiband Windom antenna, but fitted with a 300Ω balun in its feedpoint and fed over coax. A Portable NVIS Antenna is QRP-Friendly. com and TCSWAT web page. antenna systems are easily carried and installed by two people in less than 15 minutes. Antenna tuner for 10 to 80 m, but also suitable for 50 and 70 MHz bands. K1POO studied the 40m OCFD using computer models and in the May and October, 1996 issues of QST, suggested a 0. The VSWR bandwidth is as advertised. Fritzel used the shown dimensions of 13. HamSphere is a highly realistic shortwave simulation based on SDR (Software Defined Radio) technology. One of the most versatile and inexpensive wire Antenna for 10-80 meter Band. Spillner (DJ2KY) that this antenna, with the addition of a small one-band Windom for 15 m, can be used. 1971 - Dr. This dipole consists of a matching balun and two. The antenna consists of asymmetrical length horizontal. incl. rig is a codan 2110v 25w fd4 antenna 15ft above ground yyyy, ur station is amazing! do u qsl js8. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. Een bijzondere vorm van een Windom antenne is een FD4 van Fritzel. The FD4 (FD3) Windom Antenna. 200 - Inverted-V Beam Antenna for 30m. These modules can either be used with a 3. The original Windom antenna (devised in ), named after Loren Windom, W8GZ. Watch on. . America. . That is incorrect. What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4. Jobbat is el tudtam volna képzelni. Observations: Both the end-fed and center-fed antennas operate just fine without any additional conductors or feedlines. S. 2. It also works fine on all bands above 40m with a tuner, and even below 40m on 60m, and 80m, although the coax losses will be higher. Fritzel FD4 OCF Dipole The Frizel FD4 Windom is an OCF (Off Centre Fed) antenna that has been around for a long time. Latin America. Hello, it was a good signal in nort west Germany. My maximal lenght for the 2/3 wire is 24m maxi, i have no mutch place in my little garden. I have FT-891 and when i try on my FD4 antenna with 5W, i sometimes need more attempts at TX, so i spice it up to 20W to push it through. WINDOM. 2023-10-25. Watch on. 460. . What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4 antenna, described by the late Dr. click here to follow the link to The FD4 (FD3) Windom Antenna. Add to Cart Details. This became known as the Fritzel FD4 (80, 40,20,10m) but is more correctly described as the Off Center Fed Dipole (OCFD). BEST COMPACT: Antennas Direct ClearStream 4V Long-Range TV Antenna. If you make an FD3 or FD4 yourself and use this tuner, you can as well place a 1 ÷ 4 balun with good results. Add to Cart. t to. It had the same dimensions as the VS1AA multiband Windom antenna, but fitted with a 300Ω balun in its feedpoint and fed over coax. Didn't think of the postal theft situation in many countries. Both of these proved toI suggest that new frequencies be promulgated, a few KHZ further away from FT8 on the popular bands , such as 40m, 20m 17m 15m. The antenna was designed for military use from 2 to 10 MHz (some references say 2 to 30 MHz). This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. QSL via DJ6SI. 5. Short Antenna Windom 160 - 80 meters: THE FD4 (FD3) windom antenna, PA0FRI: The FD4 Windom: The New Carolina Windom: The Windom Antenna Off Center Feed: Una Windom per gli 80, 40, 20 e 15 mt, IZ1TQI: Un toroide per la windom, IK0RKS: Variation on the Windom: Windom antenna, I6QON: WINDOM antenna 160/80/40/20/10 metri, I6IBE:. 9 - A possible 40-meter beam arrangement using quarter-wave folded elements. 4:1 on the 20,15,10m bands Graphics by G8ODE June 2012 iss 1. Side kites lifting antenna ends 5. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. WINDOM. 36 . Antenna 1946 da Louis Varney G5RV: Antenna morgain 40-80 mt: Antenna Morgain per 40/80: Antenna Windom: Antenna windom, I7SWX: Antennas FD3 & FD4 Multibands, I0SJC: Antenna Levy, I0JFE: Antenne doublet raccourci, F5Z: Antenne G5RV, F5ZV: Antennes Levy et center fed multibande, F5ZV: Coaxial fed multiband windom antenna,. Good contest with many stations. , Corvallis, OR . I recently purchased the 5KW FD4 from an MWF-SERVICE. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. It covers 7 bands, 10-12-15-17-20-40-80m. Configure & Download. WINDOM. 6m is also dead, useable only for experiments and local contacts here. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. WINDOM. Hi all, I bought the Mini1300 from China and Software says Version1. 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. Tether for side kites 7. Note the circled area at 1/3 length - this is where the impedance is about the same for all these bands. WINDOM. FS: Fritzel FD4 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. A shorter version FD3 for 40-10m operation is also developed. Add to Cart. VU2NSB OmniDX antenna (11m) VU2NSB OmniDX Antenna series is a very s. 2. Fritz Spillner, DJ2KY, in 1971. com Home Mapsite Add Link. 0, but I wonder how to send WSPR or FT8. Je li netko možda stavljao napajanje na neko drugo mjesto jer sam na internetu našao i drugačije omjere. Mire jó még a Smith diagram segítségével mért eredmény? Ha ez pl. SWR is actually better with 300-ohm transmitting line than with the 450 ohm line normally used. DK2CF IC-7400 100Watt Dipole and Delta loop DK4WF FT-890 FD4 Windom 17m high DL7JOM K3 750W LPDA DL7ULM IC706 Indoor-dipole 2 x 11 metres FD4 de chez Fritzel - Antenne. Fritz Spillner, DJ2KY, in 1971. Bonnes bandes passantes en général ,elle est trés efficace en DX et surpasse toute mes autres antennes FB13-FD4-W3EDP de 1 à 2 points S. It was intended to be used on one frequency only. antenna. pc is a toughbook cf19 wx is quit good,strong winds, 9 xxxx & yyyy are the names of the two participants. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. Item number # 425fd41503. America. More bandwidth can be obtained with the rolled up ribbon stub system («fig). 3 MHz. A while back a ham in the Far East set up a Visa account system where you sent him a donation via credit card and he used that to mail back a hard card qsl. 3 MHz. RF-1936/38 Portable Crossed-Pole Antenna Series MECHANICAL RF Connector Side feed with wing nut. So I checked the frequency and had to adjust it (27MHz calibration)What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4 antenna, described by the late Dr. 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. 6-Band Windom antenna - Theory and construction of a novel trapless center-loaded off-center-f. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. 50 m 32. The problem is, that I have land in the valley, or rather only in such a valley, but I can't get over the hills even with a pole. 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. If it had been a Philips crimped on Eyelet that would have been better. name xxx qth winterthur near zurich this is my first qso on js8, funny . 5m (15 foot) mast of about 5cm (2 inch) diameter, that also serves as the outside of a low-loss coax feedline. , 4 times) over a simple low dipole are possible • Consider horizontal loop or Lazy H over aOur experts are there to help you in word and deed - independent of the frequency range and radio application. 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 4-band Fritzel model FD4 is a special version of a Windom antenna. Modified: 11/26/2021. The Fritzel FD4 antenna becomes more popular in Europe and N. D. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. This garbage disposer offers a simple, efficient, and economical way to dispose of food waste in restaurants, hotels, or hospitals serving up to 1000 meals per day, or cafeterias, commissaries, or schools. Although thousands of “hams” use and love these multi-band antennas, especially here in Europe, it seems just as many people, including several well-known antenna experts, view it. If you do the math, it emits about 1. Add to Cart Details. This was a good destruction from my dentistry study on the weekend. and "bout 15 MHz if matching is SWR Window on the following. I have connected the N connector to a tuned antenna in my yard and then received that signal via another antenna to my ic-7610 and was able to decode it okay. Hi all, I bought the Mini1300 from China and Software says Version1. vy good fr emcomm. 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. The Hobart FD4/150-2 garbage disposer offers a simple, efficient and economical way to dispose of food waste in restaurants, hotels, or hospitals, serving up to 500 meals per day, cafeterias, commissaries, or schools serving up to 1000 meals per day, or vegetable/salad prep areas of restaurants serving up to 2000 meals per day. 0: We discuss Antennas, DX'ing, Calling CQ, and other Topics. At present some Czech amateurs call it "PA0FRI" antenna. but it was nice to meet you. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. You have tried to build an FD4 antenna which is no bad solution at all. It comes complete with a 1:6 balun with. Systems FCC-4 half-wave dipole antenna, also know as the reference dipole antenna, is the simplest form of an antenna. Fritzel used the shown dimensions of 13. I'm using homebrew Windom-Antenna recently. Here I have an FD4 Windom antenna running down the garden, this is an 80 metre dipole but fed offset (about 1/3rd of the way along it’s length) with a step down Balun to match the 50 ohm coax and has a fairly low SWR on 80, 40, 20 and 10 metres. The 4-band Fritzel model FD4 is a special version of a Windom antenna. H. Background. The FD4 antenna for 20/40/80 had a lot of interference on 80 that we could not trace to a source in the building. Part Number: MFJ-1779A. The AS-2259 consists of a pair of crossed dipoles on a common feedpoint. Spillner (DJ2KY) that this antenna, with the addition of a small one-band Windom for 15 m, can be used. EN. THE OCF FD4 (FD3) WINDOM ANTENNA FD4 (80/40/20/10 m) The 4-band Fritzel model FD4 is a special version of a Windom antenna. 47 kB, 1280x1024 -. The renowned “FD4” antenna was not an exception; Have a look at its VSWR specification on pages 13 and 14 of this brochure. Operating HamSphere 4. A design for Ka-band satellite communication antenna in earth station is introduced. 7 MHz. empfangen. 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. 2 and 9. Nylon antenna extensions 9.