t to. Please select a product. The Windom - Off Centre Fed Half Wave Dipole Antenna. The 4-band Fritzel model FD4 is a special version of a Windom antenna. Furthermore, none of these designs offered 30 m. 3V microcontroller or a 5V microcontroller but it should have an SPI port. 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. Bit easy compare with logging QSO on the higher bands. Since it is resonant on multiple bands the signal level at the receiver is high. MFJ 1779A 160M Dipole Antennas MFJ-1779A. But it was over water, the villa pool hi. 7-m in the. Any hints? Thank you. 5. Today’s versions, based on the original Windom, include the common OCF and Carolina. And they seem quite slack . Délután 4-re már állt az FD4 antenna és az azt tartó pecabot. WINDOM. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. 6 dB less power than the center-fed. I also have a 10 Metre Dipole in the loft. 0: Using (but not overusing) DX Spotting and Making Manual. 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. Hi all, I bought the Mini1300 from China and Software says Version1. Modified: 11/26/2021. egy egysávos antenna lenne és az Ohmos összetevő 50 Ohm környékén lenne akkor ha induktív reaktanciát mérünk, akkor egy azzal egyenértékű reaktív. The windom antenna can also be hung as a. But since the most common and simple design is a trx-coaxial antenna, let’s talk about such an antenna design . The half-size version is known as the FD3 40-20-10m antenna. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. Fritzel Antenna Source? 7. Visit my web site: OCF FD4 (FD3) WINDOM ANTENNA. Npr. $1,909. Observations: Both the end-fed and center-fed antennas operate just fine without any additional conductors or feedlines. Fritzel FD4 OCF Dipole The Frizel FD4 Windom is an OCF (Off Centre Fed) antenna that has been around for a long time. Je li netko možda stavljao napajanje na neko drugo mjesto jer sam na internetu našao i drugačije omjere. The performance characteristics are quite outstanding. 3 MHz. What we know. Topic: Dipol - FD3 - FD4 (Read 3275 times) 0 Members and 1 Guest are viewing this topic. Conclusion: The ON4BAA-300 Windom achieves a lower VSWR than the traditional FD4 Windom on the 80, 30 and 15m bands by feeding the antenna closer to one wire end than usual. 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. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. The original Windom antenna from the late 1920s was an off-center fed resonant dipole with a single wire feedline of any length. 205 - Collinear Antenna Gain=3dB for 2m. 7 Mllz arc available if the high fre- quency is directly coupled out. 2002 - 2023 i1wqrlinkradio. We discovered in an older periodical (QRV) the explanation by F. 1971 - Dr. We discovered in an older periodical (QRV) the explanation by F. So I checked the frequency and had to adjust it (27MHz calibration) But still no success. 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. 5. The 4-band Fritzel model FD4 is a special version of a Windom antenna. You have tried to build an FD4 antenna which is no bad solution at all. 9 - A possible 40-meter beam arrangement using quarter-wave folded elements. My maximal lenght for the 2/3 wire is 24m maxi, i have no mutch place in my little garden. weBoost 5G Dome Ceiling Antenna - 50 Ohm (301121) $79. 0, but I wonder how to send WSPR or FT8. The half-size version is known as the FD3 40-20-10m antenna. NVIS Antenna Strategy • Portable and field antennas will be less efficient due to space, height and setup time • “Command post” or “Net Control” antenna should be as efficient as possible • Gains of up to 6 dB (i. It needs no tuner on 40m, 20m and 10m. +49 7276 9668-0 info@wimo. The antenna was designed for military use from 2 to 10 MHz (some references say 2 to 30 MHz). K1POO 4 Band Off Centre Fed Dipole (40-20-15-10m ) To demonstrate the accuracy of the MMANA-GAL model of the K1POO antenna, the results from the MMANA-GAL program and Rob’s (M0RZF) Vector Network Analysis are shown below. 52m long ( TT, October 1972 and ART): Fig 5. Great Multiband Antenna Time Owned: more than 12 months. I know this is an old thread - but Hofi in Germany still manufactures the antenna. 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. Properly and efficiently dispose of your establishment's food waste with the Hobart FD4/200-2 commercial garbage disposer with adjustable flanged feet. Fritzel FD4 antenna, band 80, 40, 20 & 10M plus 17 & 12M 13. I myself am working with a simple FD4 Antenna. 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. I'm using homebrew Windom-Antenna recently. When the dipole is installed horizontally, at about one meter (3-4 feet) above ground, you effectively get a NVIS low-noise dipole. While the G5RV requires an antenna tuner, it is very efficient on at least 5 bands. The 7-band antennas need at least 120 feet of ground space end-to-end. The FD4 (FD3) Windom Antenna The 4-band Fritzel model FD4 is a special version of a Windom antenna. 95. The circuit diagram shows how the module should be interfaced with a. WINDOM. Due to the small layout of the estate the other end should best be fixed on a rope going to some other house or one of the surrounding flag poles (flag poles are quite common in. The Fritzel FD4 antenna becomes more popular in Europe and N. EMEA. Item number # 425fd42003. Antennas such as G5RV with balun, W3DZZ, FD3 and FD4, trap verticals and Yagis can be easily adjusted with a FRI Match. De opgegeven maten gelden voor geïsoleerd draad. also works on the 80 and 160 meter band. Hari Delta Loop antenna for horizontal or vertical suspension, max. Watch on. Date: Wednesday, March 24, 2010, 8:24 AM. IDK about 160m, i don't have antenna for that and when i look, it's pretty dead. 0: We discuss Antennas, DX'ing, Calling CQ, and other Topics. 65m+17. 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. 0, but I wonder how to send WSPR or FT8. e. The half-size version is known as the FD3 40-20-10m antenna. popular multiband Windom design of all, was the German-made Fritzel FD4 antenna, described by the late Dr. . 6:1 and less than 1. 1971 - Dr. Ham radio call database for everyoneThe feedpoint of the 3-band antenna is not in the center, but more like a windom system: Off Center Feed (OCF). So I checked the frequency and had to adjust it (27MHz calibration)Holger, OX3HI, is using an RFzero with WSPR transmitter program running 500 mW into a FD4 antenna. 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. The Fritzel FD4 antenna becomes more popular in Europe and N. From time to time OZ0RF is active from Copenhagen in JO65FR. Here you can see the reports. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. Spillner (DJ2KY) that this antenna, with the addition of a small one-band Windom for 15 m, can be used. that's not what I'm trying to explain. . 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. Watch on. 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. Ako bi već moralo, onda može biti zgodna kombinacija ukrštenog dipola za 3. Antenna Multibands Links → . I did follow the instructions and entered my Call and Locator, selected port S1 and connected FD4 antenna. 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. com Home Mapsite Add Link. Just need an antenna. Zmierzyłem się w końcu z demonizowaną przez wszystkich anteną T2FD, ale zacznijmy od początku. If you make an FD3 or FD4 yourself and use this tuner, you can as well place a 1 ÷ 4 balun with good results. Description: Fritzel FD4 HAM radio multyband HF antenna. 1. I improved my setup with a FT920, 3 el Monobander for 10m and made Packet Radio in 1997. I did follow the instructions and entered my Call and Locator, selected port S1 and connected FD4 antennaadding two wires to the basic FD4, 4. 2 and 9. Item number # 425fd41503. 0 Extras: Using the Editor to Customize Your Transceiver. in JO62PL. but it was nice to meet you. Antenna Maxiwhip vs Antenna Windom FD4 - RX test 80mmerilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. The Fritzel FD4 antenna becomes more popular in Europe and N. You have tried to build an FD4 antenna which is no bad solution at all. I0JXX 50 MHz Yagi antennas. Perhaps the most popular multi-band Windom or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. 2004-02-19. ifos for FD4 or other antenna. Visit my web site: The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. 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 system has an impedance of 70 - 100 Ohm and for connection. Also: Someone asked if there was any usefulness of FT8. 0, but I wonder how to send WSPR or FT8. The FD-4 is still made with outstanding quality of. Operating HamSphere 4. I am new to shortwave radio and just thought I'd share my experiences in starting with this hobby. • Radioddity's limited warranty applies to all BRAND NEW items sold by radioddity. 6-Band Windom antenna - Theory and construction of a novel trapless center-loaded off-center-f. Website of Fritzel antennas ?? 8. pc is a toughbook cf19 wx is quit good,strong winds, 9 xxxx & yyyy are the names of the two participants. The power was also limited to 500 W PA input. ZS6BKW ANTENNA 22-may-2022. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. Vy. Mike has with him two transceivers: TS-850SAT and IC-706. Its main advantage was that it could easily be matched to a tube transmitter. 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. VAT, plus shipping €63. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. 205 - Collinear Antenna Gain=3dB for 2m. Part Number: MFJ-1779A. The end-fed energy is less than the center-fed. He will operate on 40, 30, 20m, including activity in CQ WW WPX CW Contest. Allows you to more easily get the antenna up high and outside. Final Clearance. The output looks a bit “interesting” and it could probably use a Band Pass Filter, but the signal is in fact there. 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. Find many great new & used options and get the best deals for PAC Aai-fd4 Rear-seat AUX Input for Select Ford Lincoln Mercury 2004 - 2010 at the best online prices at eBay! Free shipping for many products!. 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. is the designer and trade mark holder, and primary source for Bury-Flex Tm low loss coax cable. power 1 kW, approx. Add a comment. I did follow the instructions and entered my Call and Locator, selected port S1 and connected FD4 antenna adding two wires to the basic FD4, 4. . The Fritzel FD4 antenna becomes more popular in Europe and N. FD4's are by wide ranges. 200 - Inverted-V Beam Antenna for 30m. post 24 Dec 2021. Add to Cart Details. VU2NSB OmniDX antenna (11m) VU2NSB OmniDX Antenna series is a very s. Both of these proved to1971 - Dr. Download the model according to the specified sizing parameters in either 3D or 2D format. 03. The antenna is off center fed with a matching network and is mounted next to an insulator of fiberglass and polyester resin. A weekend with good DX in morse After the frustration with Uganda in morse I switched to chasing different countries and propagation was good in the weekend. The original Windom antenna from the late 1920s was an off-center fed resonant dipole with a single wire feedline of any length. Our new portable Dipole antenna set with mounting kit. Ne postoji dobro multiband rešenje. Antenna tuner for 10 to 80 m, but also suitable for 50 and 70 MHz bands. 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. FD4 (80/40/20/10 m) The 4-band Fritzel model FD4 is a special version of a Windom antenna. com The 4-band Fritzel model FD4 is a special version of a Windom antenna. G5RV. The OX3HI WSPR transmitter with 20×4 LCD. If it had been a Philips crimped on Eyelet that would have been better. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. The original Windom antenna (devised in ), named after Loren Windom, W8GZ. Tevfik Aydin Kazancioglu TA1HZAbout K7MEM - Inverted V Antenna Design The resource is currently listed in dxzone. 80-10 meter OCF antenna layout. Fritzel antenna manufacturer address. 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. You have to use the the S2 port as others have advised. 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. . rig is a codan 2110v 25w fd4 antenna 15ft above ground yyyy, ur station is amazing! do u qsl js8. Note the circled area at 1/3 length - this is where the impedance is about the same for all these bands. . 6-Band Windom antenna - Theory and construction of a novel trapless center-loaded off-center-f. I recently purchased the 5KW FD4 from an MWF-SERVICE. but it was nice to meet you. Rest assured, both problems are dealt with by the CL-OCFD, also list-ed at the bottom of Table 1. extend the basic antenna (FD4) to its full length. 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. The complete details on how to use the module through SPI is given the data sheet below. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. isolators. Fritz Spillner, DJ2KY, in 1971[1]. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk. Signal war mit etwa 15db über dem Rauschen deutlich zu. . The 4-band Fritzel model FD4 is a special version of a Windom antenna. See physical description below. Z tego też względu w. It was intended to be used on one frequency only. WINDOM. But it was over water, the villa pool hi. This link is listed in our web site directory since Thursday Jun 23 2016, and till today " HF Linked Dipole Antenna Calculator " has been followed for a total of 1468. Fritz Spillner, DJ2KY, in 1971. Mohu Leaf: $35. name xxx qth winterthur near zurich this is my first qso on js8, funny . HamSphere 4. 73 de Raimund DH8RD in JO44PE. This was a good destruction from my dentistry study on the weekend. He will be active for the next three years from the Slovak Ambassy in Baghdad. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. 5 PL Clovis FD3 Fire 3They are monoband or multiband like Frietzel FD4. The Fritzel FD4 antenna becomes more popular in Europe and N. In the total length of this antenna is 41m, height is about 11m, and diameter of element is 2mm. This video provides background on what many of us believe to be the greatest off-center-fed dipole antenna ever created. Here is my home HF antenna. > 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. 8-m and 27. Perhaps the most popular multi-band “Windom” or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. Coax D. 453. So far received 9. The original Windom antenna (devised in 1928-29), named after Loren Windom, W8GZ. 1971 - Dr. 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. The FD4 Windom antenna. A shorter version FD3 for 40-10m operation is also developed. I did follow the instructions and entered my Call and Locator, selected port S1 and connected FD4 antenna but nobody does receive me. << serial ‘ngobrol-‘ngalor-‘ngidul ihwal per-antenna-an bersama bam, ybØko/1 >>. FD3 and FD4, trap. 00. HamSphere 4. This dipole consists of a matching balun and two. 8 - An antenna system for 7, 14 and 21 Mc. 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. Guest. Watch on. 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 . 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. Whereas the FD4 being really an 80 metre dipole has lots of lobes and becomes almost. This can overload the receiver, especially on 40 m here in Europe, with a lot of broadcast stations. The 4-band Fritzel model FD4 is a special version of a Windom antenna. 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. The Windom - Off Centre Fed Half Wave Dipole Antenna. WINDOM. name xxx qth winterthur near zurich this is my first qso on js8, funny . In addition to the wire antennas, in Europe they sell a line of yagis and verticals, and are well respected. Dipol - FD3 - FD4 (1/1) TA4AU: Hi All. Hari Wire Groundplane Antennas. De antenne wordt op eenderde van zijn lengte gevoed met een geschikte HF transformator en coaxkabel. 8-m and 27. 5. Both of these proved toDe az FD4 nem egysávos antenna és a kábel már korábban felkerült a helyére. I'm just afraid that if we install a PayPal box at the LoTW page, paying can become mandatory before QSL-ing. fd4_hg7wav. Ground anchors. I asked my landlord for the possibility to fix one end of it on his house. 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,. A Portable NVIS Antenna is QRP-Friendly. This is still the most popular shortwave antenna, whether in amateur radio, for the military, public services or commercial users. 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. All groups and messages. 3175 103. 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. I just checked my EU1KY Analyzer on the spectrum analyzer. By serendipity, it also covers the 17 and 2 meter bands. The asymmetrical arrangement of the dipole results in very favourable installation possibilities in some situations. 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. 3. FDH 4000, 288 distribution fibers, no splitters loaded, LC/APC, dielectric, loose tube, 100 ft stub, distribution cable all 288f stub and input cable 24. 1971 - Dr. I'm just afraid that if we install a PayPal box at the LoTW page, paying can become mandatory before QSL-ing. Fritz Spillner, DJ2KY, in 1971. Mivel valószínű, hogy egy sávon se félhullám hosszúságú, ebben az esetben, hossztól, frekvenciától függő impedancia transzformációt végez. Multiband FD-4 Windom antena. 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. . 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. 75 MHz. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. 1st xmission 15 dB above city noise level, 2ns xmission abt 10 dB. So far received 3. The antenna rotor needed some tries to get moving again. 00 €. Rated 5 out of 5 stars. Add To Cart. Entered for fun between tourist trips to beach with XYL and other things one has to do on holi-day. 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. sierpnia 01, 2015. Elsewhere in Africa, David, VE7VR is active as A25VR from Botswana until 3 June. The Fritzel FD4 antenna becomes more popular in Europe and N. . 52m long ( TT, October 1972 and ART): Fig 5. WINDOM. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. The plot shows the current distribution on a 42 m long FD4 Windom antenna for the frequencies 80, 40, 20, 17 and 10 m. ic7800 @ 100w microkeyer ii - heil proset elite - cushcraft r6000 and fd4 antennas - n1mm logger. , 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. Aux, lines to keep antenna level 8. HamSphere 4. vy good fr emcomm. 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. Perhaps the most popular multi-band “Windom” or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. balun, incl. About How to construct a multi-band dipole using speaker wire The resource is currently listed in dxzone. Unlike typical antennas, this is a non-resonant, Off Center Fed Dipole (OCFD) antenna. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. 3 dB gain, incl. If you find my channel informative and entertaining, I hope you will consider joining my support group by c. 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. rig is a codan 2110v 25w fd4 antenna 15ft above ground yyyy, ur station is amazing! do u qsl js8. These modules can either be used with a 3. The Fritzel FD4 antenna is a classical antenna in our series of HS4 Legendary Multiband Wire Antennas. A rádió tőle kb. One should use an extra 1 ÷ 1 balun or choke balun to prevent radiation of the coax screen. Full Member; Hozzászólások: 126; Karma: +73/-2; G7FEK antenna 80 méterre. So far no one has rated yet, so be the first to rate. The AS-2259 Antenna. As at the way things are now all that will happen is Olivia will get a number of FT8 stations annoyed. WINDOM. This first video is by a beginner for beginners! In an unc. The AS-2259 consists of a pair of crossed dipoles on a common feedpoint. 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. 460. 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. At present some Czech amateurs call it "PA0FRI" antenna. S. 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. The equipment is an RFzero directly into a 1:9 UNUN. I myself am working with a simple FD4 Antenna. Fritz Spillner, DJ2KY, in 1971. My dipoles and long wires had so much noise that I hardly ever would listen to HF.