> Sent: Thursday, November 04, 2004 7:05 PM Subject: Re: [ARRL-LOTW] DXpedition Support Put together a quick shortwave antenna using just a few pieces of electrical fencing supplies. . 8-m and 27. 7-m in the. Therefor I hung up a Fritzel FD4 a while ago. VU2NSB OmniDX antenna (11m) VU2NSB OmniDX Antenna series is a very s. 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. Actually I could not get out of Europe on it. Antenna tuner for 10 to 80 m, but also suitable for 50 and 70 MHz bands. WINDOM. 5; 7; 14; 18; 28 MHz-en. 00 /Each. 7-m in the. isolators. 5-8800 MHz) CHARACTERISTICSname xxx qth winterthur near zurich this is my first qso on js8, funny . 5. So I checked the frequency and had to adjust it (27MHz calibration) But still no success. 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. > 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. 7-m in the. A rádió tőle kb. 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. Regardless of how high the antenna is, a roof, especially a metal roof, will have a negative effect on the antenna pattern if the. 11a band is. To: n4ujw@hamuniverse. It is a convenient indicator of how well the transmitter load matches the output impedance for which the transmitter was designed, and it often is the first indicator of a. Add to Cart. I myself am working with a simple FD4 Antenna. FD4S-B288S00JDB2. This trademark application was filed with the USPTO (United States Patent and Trademark Office) under the trademark classification: Computer Product, Electrical & Scientific. Fritzel used the shown dimensions of 13. My maximal lenght for the 2/3 wire is 24m maxi, i have no mutch place in my little garden. Allows you to more easily get the antenna up high and outside. 0 Extras: Using the Editor to Customize Your Transceiver. The power was also limited to 500 W PA input. Napravio bih multiband Windom antenu. De opgegeven maten gelden voor geïsoleerd draad. . Configure & Download. 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. The Windom - Off Centre Fed Half Wave Dipole Antenna. What became perhaps the most popular multiband Windom design of all, was the German-made Fritzel FD4. In addition, an R6000 has two separate traps for 12 and 17 m, while the 10 and 15 m traps of a. America. 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. 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”. One should use an extra 1 ÷ 1 balun or choke balun to prevent radiation of the coax screen. , DJ2KY modified the VS1AA antenna design by replacing the single feed wire with balun and a coax feeder. , using a shorted stub to act as an automatic switch for various bands. Monitoring from 93619, on a Uniden BC125AT scanner on AC power (battery backup), paired with an exterior custom j-pole antenna. FD4 (80/40/20/10 m) The 4-band Fritzel model FD4 is a special version of a Windom antenna. empfangen. The resource is currently listed in dxzone. 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. Other images. It is not an acceptable performer on 30, 17, or 10 meters. The Fritzel FD4 antenna becomes more popular in Europe and N. The main category is Windom antenna that is about Windom antenna links. 0 Extras: Using the Editor to. I was able to get an excellent deal on a lightly used IC-718 that includes a tuner and power supply. 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. > One additional question if the elements of the antenna are not only > inverted V config but because of the property and space if the. FD4 antena ima problem sa napajanjem. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. This has also been the case in Germany. 1971 - Dr. HamSphere 4. Fritz Spillner, DJ2KY, in 1971. Later a installed a small dipole antenna and during the weekend I worked about 60 QSO and logged about 44 squares all via ES. D. OK2SWD. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. 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. Fritzel used the shown dimensions of 13. rig is a codan 2110v 25w fd4 antenna 15ft above ground yyyy, ur station is amazing! do u qsl js8. 7-m in the 1960s. I0JXX 432 MHz Yagi antennas. EN. This antenna talks! The logs don’t lie. 73 to allWINDOM ANTENNA. The windom antenna can also be hung as a. This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. hofi de) . Antennas such as G5RV with balun, W3DZZ, FD3 and FD4, trap verticals and Yagis can be easily adjusted with a FRI Match. 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. 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. Hari Delta Loop antenna for horizontal or vertical suspension, max. Configure & Download. “FD4” 4. 7 MHz. Tu je smješten balun 1:6. We discovered in an older periodical (QRV) the explanation by F. The FD-4 is still made with outstanding quality of materials. 5. One of the most versatile and inexpensive wire Antenna for 10-80 meter Band. The original Windom antenna (devised in ), named after Loren Windom, W8GZ. It cover. Didn't think of the postal theft situation in many countries. 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. Here you can see the reports. I hope you enjoy this video and find it helpful. Antennas Direct ClearStream Flex Amplified UHF/VHF Indoor HDTV Antenna. 7-m in the 1960s. com and TCSWAT web page. Vertical antennas made of steel wire, monoband or multiband, with balun and radials. Top. H. I'm using homebrew Windom-Antenna recently. This split allows the OCFD to be operated as a 4 band antenna as the SWR on the 40m band is less than 3. and "bout 15 MHz if matching is SWR Window on the following. 200 - Inverted-V Beam Antenna for 30m. America. I still young so I thinks this is normal, didn't we all start small. He will operate on 40, 30, 20m, including activity in CQ WW WPX CW Contest. 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. Includes 1x Dipole Antenna Base with 60cm RG174, 2x 23cm to 1m telescopic antenna, 2x 5cm to 13cm telescopic antenna, 1x 3 meter RG174 extension cable, 1x Flexible Tripod Mount, 1x Suction Cup Mount. Whereas the FD4 being really an 80 metre dipole has lots of lobes and becomes almost. America. com Hex Beam Base Plates, Mastrant. $1,909. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk. TrademarkElite is the U. 35. Versi Dr. I use a FD4 Antenna, a Datong convewrter and my TS480 to listen for SAQ today morniung and just before. In the total length of this antenna is 41m, height is about 11m, and diameter of element is 2mm. 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. Antenna Windom Links → . 73 to all FT8/FT4 Digital Modes Group (Welcome To All Licensed HAM) | on air on 17 meters ,with 30 watts and fd4 antenna. 110/220 Volts. name xxx qth winterthur near zurich this is my first qso on js8, funny . However the waveform didn't look very good to me. Also, a power amplifier, L4B, is on the way to Baghdad. (Note the FD3 will also be around 66 feet total length for operating on 7 MHz and. If the insulator has been exposed to our climate for some time, the resin "evaporates" on the surface. The long operation of 6O0X continues in Somalia. The 7-band antennas need at least 120 feet of ground space end-to-end. So here at my home there is also room for improvement. but it was nice to meet you. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. The antenna is fed at a third of its length with a suitable HF transformer and coaxial cable. 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. weBoost 5G Dome Ceiling Antenna - 50 Ohm (301121) $79. The Carolina Windom is described in (Straw 2007) who attributes it to Edgar Lambert (WA4LVB), Joe Wright (W4UEB), and Jim Wilkie (WY4R) who published a variation on the ‘original' Windom. Fritz Spillner, DJ2KY, in 1971[1]. . be Multiband Delta Loop (W2EGH) | MyHam. The Fritzel FD4 antenna becomes more popular in Europe and N. 0, but I wonder how to send WSPR or FT8. . 8-m and 27. Both of these proved to1971 - Dr. Fritz Spillner1, DJ2KY, in 1971. It is a modularized Amateur Radio Transceiver where operators build their own radio using plug-ins and virtual antennas. Versi Dr. MFJ 1779A 160M Dipole Antennas MFJ-1779A. 6-Band Windom antenna - Theory and construction of a novel trapless center-loaded off-center-f. . 0: Using (but not overusing) DX Spotting and Making Manual. 5. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. Odg: Multiband FD4 antena. 0, but I wonder how to send WSPR or FT8. Great multi-band antenna, I have the FD-4 Fritzel this is the only antenna that I have and it allows me to work 80/40/20/17/12/10 and I use it on 15 and 60 meters with the internal tuner in my 940. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer. Este diseño también presenta unos bigotes de gato para trabajar las bandas WARC y los 15m. Did you try NVIS? Pretty fun here with EFHW-80-10 5 meter high in the. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. Which seem the wrong type of connector to me. 80-10 meter OCF antenna layout. 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. 13-20 describes a modified VS1AA OCFD with a 4:1 balun connected to a coaxial feeder. 00. The FD4 (FD3) Windom Antenna The 4-band Fritzel model FD4 is a special version of a Windom antenna. 8-m and 27. 1971 - Dr. America. As low as: €75. I support the "DX Code Of Conduct" to help to work with each other and not each against the others on the bands. Good Signal 15 dB above noise. A shorter version FD3 for 40-10m operation is also developed. The performance characteristics are quite outstanding. Topic: Dipol - FD3 - FD4 (Read 3275 times) 0 Members and 1 Guest are viewing this topic. The AS-2259 consists of a pair of crossed dipoles on a common feedpoint. The original Windom antenna from the late 1920s was an off-center fed resonant dipole with a single wire feedline of any length. I did follow the instructions and entered my Call and Locator, selected port S1 and connected FD4 antenna but nobody does receive me. A wire antenna dipole is inexpensive, light and - depending on local conditions - can be. Npr. The AS-2259 consists of a pair of crossed dipoles on a common feedpoint. The plot shows the current distribution on a 42 m long FD4 Windom antenna for the frequencies 80, 40, 20, 17 and 10 m. Multiband FD-4 Windom antena. 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. 155. 5 PL Clovis FD1 Fire Dispatch. So I thought forget about UHF/VHF here, better do shortwave and install a little FD4 antenna. Fritzel FD3. Fritzel used the shown dimensions of 13. I've certainly experienced postal theft of my SAE + GS mailings and was only able to secure some difficult to get countries though email discussions and the kind co-operation of the DX stations/ Managers to send me cards at their expense or having them identify a secure route. 0, but I wonder how to send WSPR or FT8. FD4 (80/40/20/10 m) The 4-band Fritzel model FD4 is a special version of a Windom antenna. 453. Fritz Spillner, DJ2KY, in 1971. Fritz Spillner, DJ2KY di tahun 1971dan diproduksi secara komersiil dengan nama Fritzel. Regardless of how high the antenna is, a roof, especially a metal roof, will have a negative effect on the antenna pattern if the. 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. OK1BA. 70cm directional antennas with 16 -. power 1 kW, approx. Operating HamSphere 4. The VSWR bandwidth is as advertised. 5 and 28 Mhz. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in. New Carolina windom antenna - PDF file by QRP Expressions by By N. This Windom antenna was marketed in the late 70's and early 80's as Smithe's Windom. 460. 6 288 29. THE OCF FD4 (FD3) WINDOM ANTENNA 19 may 2011. Rest assured, both problems are dealt with by the CL-OCFD, also list-ed at the bottom of Table 1. On higher bands it did not work well. We discovered in an. 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. Coax fed OCF ‘Windom’ antenna. Fritz Spillner, DJ2KY, in 1971. If you find my channel informative and entertaining, I hope you will consider joining my support group by c. 7-m in the 1960s. receivers, city env. jpg (228. What we know. 8 PL Clovis PD1 Police Dispatch. 7,853 4 17 50. fd4_hg7wav. The FD4 (FD3) Windom Antenna The 4-band Fritzel model FD4 is a special version of a Windom antenna. 1971 - Dr. 0m and lshort = 13. Don't hesitate - contact us. However, two problems remained: The next section explains why traditional OCF dipoles have these inherent lim-itations. 7-m in the 1960s. DJ2KY di tahun 1971dan diproduksi secara komersiil dengan nama Fritzel FD4 antenna. 249. 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. . 5m so chesen that the may not only r t radio Apart the in no other For this they and weather The highlight of this antenna is the balun, 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. Fig. In stock, shipped in 1 to 2 days. 1x Radioddity RA-FD4 8. 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. By the end of the 70's interest in the Windom. Alpha Antenna 2-20M Portable Vertical Antenna for VHF & HF. The Windom - Off Centre Fed Half Wave Dipole Antenna. 5m and 2. 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. (35' on 75M. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. The 4-band Fritzel model FD4 is a special version of a Windom antenna. Dat is op de laagste frequentie een draad van een halve golflengte. az FD4-emnél is szarabb. Fritzel used the shown dimensions of 13. A shorter version FD3 for 40-10m operation is also developed. Hi all, I bought the Mini1300 from China and Software says Version1. The. 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. is the designer and trade mark holder, and primary source for Bury-Flex Tm low loss coax cable. The 4-band Fritzel model FD4 is a special version of a Windom antenna. I recently purchased the 5KW FD4 from an MWF-SERVICE. Yeasun FT 857 D. Az első napon a városban Vadászati és Halászati kiállítás volt. The Fritzel FD4 antenna becomes more popular in Europe and N. 80-10 meter OCF antenna layout. First trim the dipole for resonance at about 3. Fritz Spillner1, DJ2KY, in 1971. I'm just afraid that if we install a PayPal box at the LoTW page, paying can become mandatory before QSL-ing. . 7 - Center-fed antenna one and one-half wavelength long (A) folded into a three-quarter-wave folded dipole (B and C). This result suggests that sequences outside the C and GMR35H08 elements restrict fd4/fd5 expression to the ventral imaginal discs. Fritz Spillner, DJ2KY, in 1971. 3175 103. Hi all, I bought the Mini1300 from China and Software says Version1. 3 dB gain, incl. K1POO studied the 40m OCFD using computer models and in the May and October, 1996 issues of QST, suggested a 0. Hi all, I bought the Mini1300 from China and Software says Version1. Tehát amit lent mértem az közel sem az, ami az antenna talppontjában ( a balun alsó végén ) lenne. There is an amateur antenna out there consisting of an 80-meter dipole (I mean one that is a half wave at 80 meters, not one physically 80 meters long) fed with about 100 feet of 450 ohm ladder line. *Note: The FD4 Windom is a 300Ω balun-fed antenna with lres = 41. The Fritzel FD-4 was designed by He. If you make an FD3 or FD4 yourself and use this tuner, you can as well place a 1 ÷ 4 balun with good results. But for a "real" FD4 the RF transformer should have 4:1 or as some say 2:1 when the height above ground is. Mike has with him two transceivers: TS-850SAT and IC-706. Fritz Spillner, DJ2KY, in 1971[1]. 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. pc is a toughbook cf19 wx is quit good,strong winds, 9 xxxx & yyyy are the names of the two participants. post 24 Dec 2021. Még lehet finomítani de már így is jó. Hari Wire Groundplane Antennas. You have tried to build an FD4 antenna which is no bad solution at all. That should be a good anchorpoint to mount my X200 and a wire antenna for HF. 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. Windom antennas for shortwave, with 1:6 balun and isolators, 200 or 1000 W. The half-size version of the FD4 is known as the FD3 (40,20,10m) and is the subject of this article. 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 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. Fritzel used the shown dimensions of 13. I built it using 3/4 inch copper pipe with rg-8 running up the center. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. hello, 13,5m; 27,5M and a 1:6 balun. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. Zmierzyłem się w końcu z demonizowaną przez wszystkich anteną T2FD, ale zacznijmy od początku. Added: 07/18/2019. The main category is Dipole antenna that is about Dipole antennas plans. EN. 55 m dipole fed with a 8. 26 Inch High Gain Antenna (Original Baofeng GT-3/GT-3TP Antenna) 1 Year and 6 months Manufacturer's Warranty. antenna. By serendipity, it also covers the 17 and 2 meter bands. 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. 0 Extras: Using the Editor to Customize Your Transceiver. So here at my home there is also room for improvement. The equipment is an RFzero directly into a 1:9 UNUN. . Date: Wednesday, March 24, 2010, 8:24 AM. Also watched the livestream on Youtube Looking forward fo christmas this year. This was a good destruction from my dentistry study on the weekend. Je li netko možda stavljao napajanje na neko drugo mjesto jer sam na internetu našao i drugačije omjere. About How to construct a multi-band dipole using speaker wire The resource is currently listed in dxzone. The resonance of the antenna at about 15-m height was close to 3. 0 29. 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. Rated 5 out of 5 stars. I live in a suburb. So far received 9. Perhaps the most popular multi-band “Windom” or more accurately, OCFD was the German-made Fritzel FD4 antenna, described by the late Dr. The OX3HI WSPR transmitter with 20×4 LCD. Today, many radio amateurs are using multiband Windom antennas with more thanTHE 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. This became known as the Fritzel FD4 (80, 40,20,10m) but is more correctly described as the Off Center Fed Dipole (OCFD). ( 3 ) Estimated Ship Date: Monday 11/20/2023. , Corvallis, OR . HamSphere 4. University merilis tulisan tentang cara menala half -wave antenna dengan pengumpanan lewat single wire ini. vy good fr emcomm. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. 0: We discuss Antennas, DX'ing, Calling CQ, and other Topics. Topic: Dipol - FD3 - FD4 (Read 3108 times) 0 Members and 1 Guest are viewing this topic. RF-1936/38 Portable Crossed-Pole Antenna Series MECHANICAL RF Connector Side feed with wing nut. 0: We discuss Antennas, DX'ing, Calling CQ, and other Topics. It was designed to cover 80, 40, 20 15, and 10 meters. 6625 114 DCS Clovis PD7 Public Works . The FD4 Windom antenna. t to. 2. I improved my setup with a FT920, 3 el Monobander for 10m and made Packet Radio in 1997. The Hobart FD4/200-1 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, cafeterias, commissaries, or schools serving up to 2000 meals per day, or vegetable/salad prep areas of restaurants serving up to 4000 meals per day. a Windom (FD4) antenna I liked to satisfy my wish in having a beam antenna usable in the the upper bands. De tråde som Verner//OZ9XU anbefaler dig at montere, giver glimrende resultater. balun, incl. Displaying 1 to 8 (of 8 products) Result Pages: 1. QSL via his home call. In Stock. America. We discovered in an older periodical (QRV) the explanation by F. 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. Spillner (DJ2KY) that this antenna, with the addition of a small one-band Windom for 15 m, can. 1971 - Dr. 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. 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. but nobody does receive me. 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. PWR TRAPS 4 cm Ø. One would argue that the stations worked would simply mail some funds to these DXpeditions to offset the lost income included with QSL requests. 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. Fritz Spillner, DJ2KY, in "Die FD4-Windom-Antenne," QRV, Stuttgart, 25, December 1971, pp. Add to Cart Details.