I hope you enjoy this video and find it helpful. 1971 - Dr. The resonance of the antenna at about 15-m height was close to 3. 5; 7; 14; 18; 28 MHz-en. 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. The FD4 Windom antenna. What we know. 3175 103. I myself am working with a simple FD4 Antenna. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer. +49 7276 9668-0 info@wimo. OCF, FD4, FD3 (WINDOM) ANTENNE Met foto's, tekst en tekeningen. Sometimes, all you can use for 40 m field work is a low-slung portable dipole antenna. 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. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. I was able to get an excellent deal on a lightly used IC-718 that includes a tuner and power supply. I recently purchased the 5KW FD4 from an MWF-SERVICE. Az FD4 antennámon a következő lépés az antenna mérése, kihasználva a VNWA lehetőségeit. The Fritzel FD-4 was designed by. The VSWR bandwidth is as advertised. The FD4 (FD3) Windom Antenna The 4-band Fritzel model FD4 is a special version of a Windom antenna. 0: Using (but not overusing) DX Spotting and Making Manual. Vertical antennas made of steel wire, monoband or multiband, with balun and radials. > 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. Sometimes, all you can use for 40 m field work is a low-slung portable dipole antenna. 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. Jobbat is el tudtam volna képzelni. The antenna was designed for military use from 2 to 10 MHz (some references say 2 to 30 MHz). Len Carlson, K4IWL. Also: Someone asked if there was any usefulness of FT8. The complete details on how to use the module through SPI is given the data sheet below. The antenna was designed for military use from 2 to 10 MHz (some references say 2 to 30 MHz). 3. It is not an acceptable performer on 30, 17, or 10 meters. Flag at 50m point E. Documentation. Watch on. 205 - Collinear Antenna Gain=3dB for 2m. Add to Cart. Both of these proved toA special form of a Windom antenna is a FD4 from Fritzel. The half-size version is known as the FD3 40-20-10m antenna. Background. 800 Watt FD4 multi-band antenna with 1:4 super balun Project for a multi-band antenna for the 80, 40, 20, 17, 12, 10 and 6 meter bands, including a 1:4 impedance transformer and a current balun handling 800 Watt with common mode attenuation up to 40 dB! Complete balun and 1:4 impedance transformer See full list on iw5edi. (Note the FD3 will also be around 66 feet total length for operating on 7 MHz and. Once I. hofi de) . 4:1 on the 20,15,10m bands Graphics by G8ODE June 2012 iss 1. If it had been a Philips crimped on Eyelet that would have been better. Fritz Spillner, DJ2KY, in 1971. 200 - Inverted-V Beam Antenna for 30m. 3V microcontroller or a 5V microcontroller but it should have an SPI port. . Good contest with many stations. 1971 - Dr. America. 68. This has also been the case in Germany. . For best results with this type of antenna, the Apex Angle should be kept between 70 and 110 Degrees . America. The Standing Wave Ratio (SWR) is the parameter that is easiest for most hams to measure, as meters are very common, both built into many newer radios or as a shack accessory. > Sent: Thursday, November 04, 2004 7:05 PM Subject: Re: [ARRL-LOTW] DXpedition SupportPut together a quick shortwave antenna using just a few pieces of electrical fencing supplies. A shorter version FD3 for 40-10m operation is also developed. The Fritzel FD4 antenna becomes more popular in Europe and N. The Fritzel FD 3 HF Antenna,is a great antenna! He is made for the 10-20-40 meter bands,and wil. Fritzel FD4 antenna, described by the late Dr. Spillner (DJ2KY) that this antenna, with the addition of a small one-band Windom for 15 m, can be used. The antenna can be employed on 80, 40, 20 and 10m with considerable, though acceptable levels of VSWR. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer. Its main advantage was that it could easily be matched to a tube transmitter. The 4-band Fritzel model FD4 is a special version of a Windom antenna. power 1 kW, approx. Date: Wednesday, March 24, 2010, 8:24 AM. 95. So here at my home there is also room for improvement. com. TA4AU. Unlike typical antennas, this is a non-resonant, Off Center Fed Dipole (OCFD) antenna. One of the most versatile and inexpensive wire Antenna for 10-80 meter Band. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk. Fritzel FD4 antenna, band 80, 40, 20 & 10M plus 17 & 12M 13. Pilot kite 3. It is a long half wave on the lowest frequency and is powered by a coaxial cable through a. I myself am working with a simple FD4 Antenna. While most of the antennas were made by "name" manufacturers, the Gesobyte and the Btfdreem were chosen specifically. 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. Rated 5 out of 5 stars. . The garden is about 6 by 30m, just big enough to fit a FD4 antenna. Fritz Spillner, DJ2KY, in 1971[1]. A kitelepülés során esténként mindig rádióztunk több-kevesebb sikerrel. 2 29. 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. 1. This antenna talks! The logs don’t lie. Furthermore, none of these designs offered 30 m. Rest assured, both problems are dealt with by the CL-OCFD, also list-ed at the bottom of Table 1. About The FD4 Windom antenna The resource is currently listed in dxzone. Fritzel Antenna Source? 7. 2023-10-25. It covers 7 bands, 10-12-15-17-20-40-80m. 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. Today’s versions, based on the original Windom, include the common OCF and Carolina Windom. 7-m in the 1960s. It covers 7 bands, 10-12-15-17-20. America. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. The Fritzel FD4 antenna becomes more popular in Europe and N. 1971 - Dr. Short video of 40m swl :) Thanks for watching my HAM radio videosBANG FOR THE BUCK: Pingbingding Digital Amplified Yagi HDTV Antenna. This Windom antenna was marketed in the late 70's and early 80's as Smithe's Windom. The circuit diagram shows how the module should be interfaced with a. SWR is actually better with 300-ohm transmitting line than with the 450 ohm line normally used. The fundamental ideaWith some very old antennas the traps of radiator and director are equal. Mivel valószínű, hogy egy sávon se félhullám hosszúságú, ebben az esetben, hossztól, frekvenciától függő impedancia transzformációt végez. The OX3HI WSPR transmitter with 20×4 LCD. All groups and messages. 00. 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. 03. com in a single category. QSL via DJ6SI. Any hints? Thank you. TNX for nice contest. 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. I0JXX 432 MHz Yagi antennas. 4+4. See physical description below. The Windom - Off Centre Fed Half Wave Dipole Antenna. 460. The wires are installed in an inverted-vee configuration from the top of a 4. 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. Z tego też względu w. 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. 7-m in the. I0JXX 50 MHz Yagi antennas. . At this moment, though, I don't remember if I used WSPR or FT8 to test with. It kind of works for 160, 80 and 40 meter. By serendipity, it also covers the 17 and 2 meter bands. The FD4 Windom. 1971 - Dr. Ultra Vizion HD Digital TV Antenna: $44. *Note: The FD4 Windom is a 300Ω balun-fed antenna with lres = 41. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. 6. The renowned “FD4” antenna was not an exception; Have a look at its VSWR specification on pages 13 and 14 of this brochure. See physical description below. We discovered in an. 5 and 28 Mhz. This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. Tu je smješten balun 1:6. New Carolina windom antenna - PDF file by QRP Expressions by By N. The Windom - Off Centre Fed Half Wave Dipole Antenna. FS: Fritzel Windom Type antenna. See you again, friends . but it was nice to meet you. FS: Fritzel FD4 antenna. 3 m dia loop and E field antenna, 2. This dipole consists of a matching balun and two. Rating & Comments (0) Tags (7) Alternate Versions. 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. Since it is resonant on multiple bands the signal level at the receiver is high. What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4. . #1 Trademark Search and Registration Service :: TUNNEL VOICE FD4 is a trademark and brand of Tunnel Radio of America, Inc. The half-size version is known as the FD3 40-20-10m antenna. 5 i 7 MHz i neke multiband vertikalne antene za gornje opsege. However the waveform didn't look very good to me. The plot shows the current distribution on a 42 m long FD4 Windom antenna for the frequencies 80, 40, 20, 17 and 10 m. 2350 103. A Portable NVIS Antenna is QRP-Friendly. Fritz Spillner, DJ2KY, in 1971. WINDOM. 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. I made contacts with Azerbaijan, Suriname, Qatar and Thailand. Please send me schematics or infos by mail to Thanks in advance. The performance characteristics are quite outstanding. Antenna Windom Links → . , Corvallis, OR . The FD-4 is still made with outstanding quality of materials. A FD4 multiband HF Antenna B. jpg (228. Baldur Drobnica is using 100W on the HF bands with an FD4 antenna. Mohu Leaf: $35. A shorter version FD3 for 40-10m operation is also developed. com. OK2SWD. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. DESIGN. Name: Fritzel FD4 HAM radio antenna. This video provides background on what many of us believe to be the greatest off-center-fed dipole antenna ever created. 0 Extras: Using the Editor to. 1750 114. Name: Fritzel FD4 HAM radio antenna. a Windom (FD4) antenna I liked to satisfy my wish in having a beam antenna usable in the the upper bands. 2 and 9. It covers 7 bands, 10-12-15-17-20-40-80m. 0, but I wonder how to send WSPR or FT8. . 10-20m bands suck at the moment all day every day, 40-80m work good in the afternoon and 80+40m at evening here in europe. Mike has with him two transceivers: TS-850SAT and IC-706. #1 Trademark Search and Registration Service :: TUNNEL VOICE FD4 is a trademark and brand of Tunnel Radio of America, Inc. Find many great new & used options and get the best deals for Radioddity INF-641 Dual-Band 21CM SMA Female Booster Antenna for Two-way Radio at the best online prices at eBay! Free shipping for many products!On Tue, 22 Jun 2004 00:56:48 +0000, M1LCR wrote: between 3. but it was nice to meet you. The G5RV has a reasonable SWR on 80, 40, 20, 15, and 12 meters. 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. Hi all, I bought the Mini1300 from China and Software says Version1. and "bout 15 MHz if matching is SWR Window on the following. EMEA. , 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. I still young so I thinks this is normal, didn't we all start small. Source for Fritzel Antennas? 10. 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 following plot shows the measured SWR of an FD4 antenna from 3 MHz to 30 MHz with about 20 m of RG58U feeder line. New Carolina windom antenna - PDF file by QRP Expressions by By N. So far no one has rated yet, so be the first to rate. Most Popular. 6O6X. Fritz Spillner1, DJ2KY, in 1971. 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 Stealth Multiband Vertical A vertical antenna for 40 and 80 meters band, using a telescoping. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. It was intended to be used on one frequency only. A Double Windom Antenna for Eight This which originally appeared as two articles in cq-DL, was translated from the German by Dr. Len Carlson, K4IWL. 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. When the dipole is installed horizontally, at about one meter (3-4 feet) above ground, you effectively get a NVIS low-noise dipole. Nylon antenna extensions 9. S. 52m long ( TT, October 1972 and ART): Fig 5. Though works on the other bands with an ATU. 73, Ray K1XV . . Tevfik Aydin Kazancioglu TA1HZAbout K7MEM - Inverted V Antenna Design The resource is currently listed in dxzone. balun, incl. The FD4 is almost ready, but the weather hasn’t cooperating lately. ). 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,. WINDOM. 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. 1971 - Dr. Aux, lines to keep antenna level 8. 204 - Low Radiation Angle Full-Wave Loop Antenna for 80m. 11ax) Adapter with 2 External. It needs no tuner on 40m, 20m and 10m. Above, Straw's diagram of the Carolina Windom. It is used for military and paramilitary communications, broadcasting, [1] especially in the tropics, and by radio amateurs for nearby contacts circumventing line. Please select a product. This antenna was developed in Germany, although others likely advanced it also. The FD4 (FD3) Windom Antenna The 4-band Fritzel model FD4 is a special version of a Windom antenna. This kind of antenna uses splash plate feed based on ring-focus antenna. My maximal lenght for the 2/3 wire is 24m maxi, i have no mutch place in my little garden. RF-1936/38 Portable Crossed-Pole Antenna Series MECHANICAL RF Connector Side feed with wing nut. A 1 ÷ 6 auto transformer matched the antenna to the 60-On one occasion when the steward helped Vasek put his luggage up in the board case, she strictly refused the suitcase above any person and Vasek had to move with it the tail of the aircraft. 8-m and 27. 1971 300 Ω 41. ZS6BKW 's design was based on the original G5RV antenna, a 2 × 15. . 2004-02-19. The AS-2259 Antenna. KEY 1. az FD4-emnél is szarabb. Fritzel used the shown dimensions of 13. But for a "real" FD4 the RF transformer should have 4:1 or as some say 2:1 when the height above ground is. . ' IS (MHz) so. Now, how was a Windom antenna developed? It began with a center-fed, half-wave dipole. antenna systems are easily carried and installed by two people in less than 15 minutes. FD4 antenna, lent a kábel végén mérve. 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. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. Guest. That is incorrect. , DJ2KY modified the VS1AA antenna design by replacing the single feed wire with balun and a coax feeder. antenna systems are easily carried and installed by two people in less than 15 minutes. 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. Dat is op de laagste frequentie een draad van een halve golflengte. << serial ‘ngobrol-‘ngalor-‘ngidul ihwal per-antenna-an bersama bam, ybØko/1 >>. com in 3 categories. This video provides background on what many of us believe to be the greatest off-center-fed dipole antenna ever created. Fritzel used the shown dimensions of 13. The Fritzel FD4 antenna becomes more popular in Europe and N. The main category is Dipole antenna that is about Dipole antennas plans. WINDOM. 7 Mllz arc available if the high fre- quency is directly coupled out. The last change around the mixer circuit is based on FT-7B's AGC design e. But it was over water, the villa pool hi. that's not what I'm trying to explain. 8-band antennas need 239 feet of ground space end-to-end. 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. Ashok Use your search engine to find 'FD3 antenna' and 'FD4 antenna' - I see many hits. 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. Note the circled area at 1/3 length - this is where the impedance is about the same for all these bands. 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. Did you try NVIS? Pretty fun here with EFHW-80-10 5 meter high in the. . 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 Windom - Off Centre Fed Half Wave Dipole Antenna. Because the most popular way to feed an 80-meter dipole is with a 50-Ω coaxial feed line, the conversion to a broadband antenna system is straightforward. 0 Extras: Using the Editor to Customize Your Transceiver. By the end of the 70's interest in the Windom. 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. pc is a toughbook cf19 wx is quit good,strong winds, 9 xxxx & yyyy are the names of the two participants. 73 to allWINDOM ANTENNA. 2 and 9. Part Number: MFJ-1779A. Guest. In addition, an R6000 has two separate traps for 12 and 17 m, while the 10 and 15 m traps of a. FD4 (80/40/20/10 m) The 4-band Fritzel model FD4 is a special version of a Windom antenna. Download the model according to the specified sizing parameters in either 3D or 2D format. Because of its bigger. 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. VAT, plus shipping €201. The equipment is an RFzero directly into a 1:9 UNUN. Fritz Spillner, DJ2KY, in 1971. El dipolo Windom es un dipolo de 1/2 longitud de onda de la banda deseada, estando el punto de alimentación conectando a 1/3. The antenna can be employed on 80, 40, 20 and 10m with considerable, though acceptable levels of VSWR. Tehát amit lent mértem az közel sem az, ami az antenna talppontjában ( a balun alsó végén ) lenne. Didn't think of the postal theft situation in many countries. foot mast. It is a modularized Amateur Radio Transceiver where operators build their own radio using plug-ins and virtual antennas. 3 dB gain, incl. Free Shipping. in JO62PL. 5m (15 foot) mast of about 5cm (2 inch) diameter, that also serves as the outside of a low-loss coax feedline. 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. 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. Operating HamSphere 4. Added: 07/18/2019. Fritz Spillner, DJ2KY di tahun 1971dan diproduksi secara komersiil dengan nama Fritzel. 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. In stock, shipped in 1 to 2 days. Contact. D. De tråde som Verner//OZ9XU anbefaler dig at montere, giver glimrende resultater. We discovered in an older periodical (QRV) the explanation by F. 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. that's not what I'm trying to explain. BEST LONG-RANGE: Five. I have it mounted flattop up about 45 feet. Study of the Off Centre Fed Dipole Antenna - G8ODE Short Long Feed point The Off Centre Fed Half-wave Dipole The Off-Centre Fed Half-Wave Dipole, more commonly referred to as the OCFD, is very popular because it offers good performance as a multi-band antenna using an antenna matching unit in conjunction with a 4:1 or 6:1. com and TCSWAT web page. ----- Original Message ----- From: "Gerry Hohn" <telwest@. The theory of the. Searching for Fritzel Windom (Fritzel in business?) 4. Dat is op de laagste frequentie een draad van een halve golflengte. Fritz Spillner, DJ2KY, in 1971. Perhaps the most popular multi-band Windom or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. Topic: Dipol - FD3 - FD4 (Read 3275 times) 0 Members and 1 Guest are viewing this topic. Study of the Off Centre Fed Dipole Antenna - G8ODE Short Long Feed point The Off Centre Fed Half-wave Dipole The Off-Centre Fed Half-Wave Dipole, more commonly referred to as the OCFD, is very popular because it offers good performance as a multi-band antenna using an antenna matching unit in conjunction with a 4:1 or 6:1. until the next time frans pa3cgj: pa6nd102' G5RV standard length antenna with 34' of 3/4" ladder line and a RG8 12" dia, 10 turn coaxial choke, feed by RG8 coax. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk. I use a FD4 Antenna, a Datong convewrter and my TS480 to listen for SAQ today morniung and just before. Add a comment. 0, but I wonder how to send WSPR or FT8. also works on the 80 and 160 meter band. 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. The MMANA-GAL model’s data comma-separated variables (CSV) file is plotted as MS-Excel graph between. Ona je dugačka pola valne duljune L. Perhaps the most popular multi-band “Windom” or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. During his spare time from the contest he will try to work some PSK31, especially on 30m band. 201 - FD4 Windom Antenna for 80m, 40m, 20m, 10m. Allows you to more easily get the antenna up high and outside. Furthermore, none of these designs offered 30 m. Both of these proved toFritzel FD4 antenna, described by the late Dr. Balun C. . The photos of the FD4 in web adverts show Eyelets. Description: Fritzel FD4 HAM radio multyband HF antenna. 3 K1POO 4. Hi all, I bought the Mini1300 from China and Software says Version1. 8-m and 27. Fritzel FD4 antenna, described by the late Dr. Még lehet finomítani de már így is jó. Stay safe with that monster antenna!try other time, like morning and evening when people are on their stations actively clicking CQs, not just JTDXing automatically for the priziest QSO. The Fritzel FD4 antenna becomes more popular in Europe and N. 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. Also, a power amplifier, L4B, is on the way to Baghdad. . By the end of the 70's interest in the Windom ----- Original Message ----- From: "Gerry Hohn" <telwest@. 8 - An antenna system for 7, 14 and 21 Mc. It was designed to cover 80, 40, 20 15, and 10 meters. 80,40,20,17,12,10m Seperate parts for balun, isolator, wires. Tether for side kites 7. Npr. Fritzel used the shown dimensions of 13. 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. The Fritzel FD4 antenna becomes more popular in Europe and N. Fritz Spillner, DJ2KY, in 1971.