36Mhz, the length is 87. 468 / frequency (MHz) = length of wire in feet. 1 metres up from the feedpoint, leaving 5 metres of wire above that. 287 MHz, or a dipole length of about 32. Dipoles have a feed point of about 75Ω in free space, and can be fed with 50Ω to 75Ω coax with or without a 1:1 balun. 5' for 20m). A variety of figures are used for determining the length of the half wave antenna. 74 cm 2 , consider the lowest frequency as 3. Technically a true "longwire" needs to be at least. In general terms, the length of a stringer for a stairs is 14 inches for every step. 2. 05 counterpoise here, you will likely need a tuner. BUY NOW. The results are conveniently displayed in inches, centimeters, feet and meters. 350 MHz. Web. Enter a length between 1 and 500 feet Distance from center of antenna to the center of the coil in feet (Must be less than half the total antenna length given above) Enter a distance between 0 and 250 feet that is less than half the total antenna length Diameter of the conductor in inches (14 gauge is. While these lengths have been shown to work well on many bands, which is helpful if you're in a hurry to get on the air, read up on the topic and experiment. At the top of the calculator, enter the Frequency (1 to 30 MHz) of interest. This is a practical maximum for commercial masts, telescoping poles and trees. It is optimized for 3. On 40 meters the antenna radiates as two half-waves. 36Mhz, the length is 87. fed at its end and resonates on the highest band (shortest wave length), the 20 m. 622073 'length of 15m element sy l17=0. The distance from the feedpoiint to the load capacitor is 43 feet 8 inches. The antenna is most suitable for short range NVIS contacts. The Wire Size can range from 16 AWG to 12 AWG. 2microHenry compensation coil at ~2m from the transformer to bring 10 meters in though. Lowest measured inductivity = 2. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. cm trapped efhw for 40/30/20/17/15m cm ce sy l15=6. 1/2 λ dipole (meters) = 142. v=30 MHz=30xx10^6 Hz lambda=c/v=(3xx10^8 ms^(-1))/(30xx10^6 s^(-1))=10 m Hence length of antenna l=lambda/2=10/2=5 m. While these lengths have been shown to work well on many bands, which is helpful if you're in a hurry to get on the air, read up on the topic and experiment. In this article I will try to share my experience with the end fed long wire antenna. 819581 'length of 17m element sy l20=2. but not in a. 1/2 λ dipole (meters) = 142. A counterpoise is simply a long, insulated wire that attaches to the ground connection on your antenna tuner. They seem to fall into two main categories:. 2. The Wire Size can range from 16 AWG to 12 AWG. The table below represents half wave lengths and multiples that you DO NOT WANT TO USE! You have to stay away from a half wavelength on any frequency. 40m still needs some trimming! Other Ham's Experiences. Web. 5 feet. Aug 06, 2015 · An End Fed Half Wave Length Antenna is a variation of the much more common half wave length dipole antenna. It has become popular with portable operators because it’s very simple in its construction and deployment. Log In My Account er. The larger the wire, the wider the bandwidth. 5 mm copper wire with black plastic jacket. 05 wavelength counterpoise for an EFHW (just 1 meter on the 20m band), so most of that run down the garden would be guy rope!. Add a loop of string to the top, and hang it on a tree branch, use it. For the coil, you need 6 turns on a 1" od PVC pipe. Web. Gain drops by 2/3 from 6. Slim Jim and J-Pole antenna calculator – Build a cactus for any frequency. 7 mtr in total length with 15. Worked USA and 4 summit to summit contacts on 20m :o) 20m & 30m look good on the aerial analyser. On 40 meters the antenna radiates as two half-waves. 5 feet. Web. The measurements below are for building a simple Dipole Antenna. 000 MHz 300 Watts Covers 7. a What size wire do I need for my antenna? a How does the EFHW-8010 antenna radiate & what are the radiation patterns per band? a Can I use an antenna tuner to correct elevated SWR on my EFHW antenna? a. 5 feet but with a 36:1 transformer, the length will be slightly shorter so 87. Adjust the length for minimum SWR at 5. All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". 1/4 Wave Ground Plane Antenna Calculator Ahh, the good old quarter wave ground plane! This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. The Zeppelin antenna consists of a half wavelength of wire fed by a quarter wave length of transmission line. Put the coax connector into the hole and use a marker to mark the four holes for the screws (see 2A and 2B). The table below represents half wave lengths and multiples that you DO NOT WANT TO USE! You have to stay away from a half wavelength on any frequency. 22-Jun-2007 09:30 AM. I have made a javascript calculator below for simplicity with a 15m half wave ready to go! Enter the frequency: MHz Half Wave antenna is: Metres Minimum counterpoise: Metres End Fed Half Wave (6. Now remove the resistor from tuner and connect the antenna. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. The table below represents half wave lengths and multiples that you DO NOT WANT TO USE! You have to stay away from a half wavelength on any frequency. Sep 18, 2021 · 132′ EFHW to 50′ support With the far end 50′ high there is now an 8 db null in the forward direction towards your support. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable ‘roll up’ antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. There are two major ways to accomplish this. Web. For the coil, you need 6 turns on a 1" od PVC pipe. 1/4 Wave Ground Plane Antenna Calculator Ahh, the good old quarter wave ground plane! This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. Web. This can be useful for determining antenna ground plane requirements, antenna spacing requirements to prevent coupling in for multi-antenna systems, or other situations where the antenna’s wavelength is needed. Smaller wire equals higher feed point resistance. Inverted Vee’s present closer to 50Ω due to the effect of the ground being close to the tip of each leg. Hence, this length of wire is a multi-band HF wire antenna that would resonate fairly well to produce good and repeatable feed-point impedance . This antenna is as old as radio and is probably best known as the Zepp Antenna Shortened EFHW Antenna 80-10m A shortened multiband antenna, about 23m long, for 80m - 10m bands with a low SWR (<1. The Antenna Wire For 80m you need 134 feet of wire (not including the coil). Step 2. Efhw antenna length calculator. Aug 06, 2015 · An End Fed Half Wave Length Antenna is a variation of the much more common half wave length dipole antenna. Enjoy these similar articles: 2 Meter, 5/4 Wave Antenna Revealed Adding 0. End-fed half wave. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great. Slim Jim and J-Pole antenna calculator – Build a cactus for any frequency. 5 41 58 71 84 107 119 148 203 347 407 423. The dipole can be straight or bent. (Enter "0" for a base loading coil. Feb 14, 2022 · The following is a list of materials required to make a 49:1 unun impedance transformer for an end-fed half wave antenna. 2 MHz 18. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. For the coil, you need 6 turns on a 1“ od PVC pipe. When an antenna that is one half wave length long has RF energy applied to it at its resonant frequency a standing wave develops on it. In general terms, the length of a stringer for a stairs is 14 inches for every step. 050 MHz = 20,20 m. Here we take a look at an End Fed Half Wave antenna which is resonant on many HF bands due to a 49:1 matching unit being used. 313973 'length of 40m element sy ltrap=0. In other words, it was modeled as two half wavelength wires end-to-end and the length of each was kept the same but adjusted to obtain a purely resistive match. Efhw antenna length calculator End Fed Half Wave 40-10 Wire Antenna The solution to improving my send and receive would be making an End Fed Half Wave ( EFHW ) 10-40 antenna. You can enter any frequency you like, however, the tables are only valid for 1 to 30 MHz. The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet. 7-4MHz with high power and tuner? a EFHW antennas possible problems. A standard recommendation (see QST, March 1936, p. 22 × 600 = 4900 ohms. . It is designed as a highly portable wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. 076 T. This link is listed in our web site directory since Monday Feb 4 2013, and till today "End Fed Half Wave Antenna for 6 / 40 Meter" has been followed for a total of 2982 times. In general terms, the length of a stringer for a stairs is 14 inches for every step. It might need ~1. Dipole Antenna Calculator The measurements below are for building a simple Dipole Antenna. (To better understand the variables be sure to read the application notes and study the drawings, following. $ 179. 35 MHz. Open the dipole length calculator in a separate page. This antenna, which works on 10, 15, 20, and 40 meters, has a very high impedance of around 2,500 Ohms. This can be useful for determining antenna ground plane requirements, antenna spacing requirements to prevent coupling in for multi-antenna systems, or other situations where the antenna’s wavelength is needed. . The Wire Size can range from 16 AWG to 12 AWG. The Wire Size can range from 16 AWG to 12 AWG. Common lengths are 44' 53' etc. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Although it is simple to build and is a multiband antenna, it has several attributes that make its overall performance far less than optimum for any serious HF DX operator’s liking. It is not necessary to calculate the above; the results are sown in the following table. Efhw antenna length calculator. Web. Web. Voltage and Current Distribution on a Half Wave Antenna •To get EM radiation, we need to accelerate some electrons •At end => Voltage max & current min •At center => Voltage min & current max •Feed impedance changes as the feed point moves •Min Z at center (typically 50-75 ohms) •Max Z at ends (typically 2-5K ohms) •Off Center Fed Dipole (OCFD) (typically ~200 ohms). 900 MHz. 2 = 33 feet. At 5W input the connector at the end of the antenna wire may be up to 160V, and at 15W it may be 270V. At a total length of 75 feet, the antenna consists of a 25 foot matching section with a 50 foot radiator. The following program will calculate the lengths needed to construct several popular wire antennas. The following table gives a few data points to consider. Mar 26, 2020 · You can calculate the necessary length through this simple equation: L (foot) = 468 / f (frequency in MHz). 5 feet is a good place to start. The total length of the radiator is 136 feet 6 inches. Log In My Account as. The guy in MA even gave me a 599 signal report. Log In My Account hi. 35 MHz. At the top of the calculator, enter the Frequency (1 to 30 MHz) of interest. Here we take a look at an End Fed Half Wave antenna which is resonant on many HF bands due to a 49:1 matching unit being used. 22-Jun-2007 09:30 AM. Above: A 132′ EFHW slanted at a 45° angle up to a 90′ support and at a 20° “DX” takeoff angle has four nulls in the pattern on 3. The distance from the feedpoiint to the load capacitor is 43 feet 8 inches. Wire Antenna Calculator. At the top of the calculator, enter the Frequency (1 to 30 MHz) of interest. Smaller wire equals higher feed point resistance. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. Nov 21, 2021. 5:1 at 14. For any single band End-Fed Half Wave antenna such as 60M, you don't need a capacitor. xf; sd. 05 counterpoise here, you will likely need a tuner. 22-Jun-2007 09:30 AM. Web. Step 3. A transformer is needed for this type of antenna to match the high-impedance feed point down to something that is suited for the cable and radio (aka 50 ohms). In this case C~5pF and Z~2450 Ω suggests that the inductance needed should be about 30 µH. Antenna Calculator - West Mountain Radio Dipole Antenna Calculator The measurements below are for building a simple Dipole Antenna. 0 dbi gain at (at 55° away from vertical). Cut the dipole wire to be a little longer than the computed length – it’s easier to cut wire than to extend it. Gain drops by 2/3 from 6. SWR is within range indicated on the website. 3) on 80m and 40m, and <3 till 10m. It is rugged and very built. (Adjustments to the length for your particular installation can move the resonance point to your preference). For best results, use the longest wire shown on the table that will fit your installation constraints. Lowest frequency = 7. 12 dBi at 40 feet down to 2. At the top of the calculator, enter the Frequency (1 to 30 MHz) of interest. 12 dBi at 40 feet down to 2. The end fed 1/2 wave antenna, much like the 43 foot vertical, has become a cult phenomena. , 84 / 5 ≈ 17 ft). (To better understand the variables be sure to read the application notes and study the drawings, following. The calculator suggested that for an 18m vertical to resonate at 1900kHz with a 195µH inductor, it should be 13. 7 mtr in total length with 15. 000 MHz 300 Watts Covers 7. 313973 'length of 40m element sy ltrap=0. Efhw antenna length calculator. The EFHW Alpha Sr is an HF End Fed Half Wave antenna that is 60 feet in length. - MyAntennas. Lowest measured inductivity = 2. The EFHW in use on a SOTA summit with MTR3B. 7 MHz 5. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. 7-4MHz with high power and tuner? a EFHW antennas possible problems. This is a practical maximum for commercial masts, telescoping poles and trees. Add a loop of string to the top, and hang it on a tree branch, use it. Worked USA and 4 summit to summit contacts on 20m :o) 20m & 30m look good on the aerial analyser. In our example that would be a trim for about 14. Setting up my antenna for 20m the first time took about half an hour, and I was able to get very close to 1:1 SWR using. A transformer is needed for this type of antenna to match the high-impedance feed point down to something that is suited for the cable and radio (aka 50 ohms). Web. Rigged to an even more practical 20′ height that forward null is closer to 10 db. The Velocity Factor is then used to calculate the Antenna Length . The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable ‘roll up’ antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. The calculator suggested that for an 18m vertical to resonate at 1900kHz with a 195µH inductor, it should be 13. Web. This standing wave consists of both current and voltage that are 90 degrees out of phase. 05 wavelength wire to EFHW antenna; Collinear 5/8 wave J-Pole vs. Saturday November 2022 Phone +44 (0) 7753225261; Subscribe. There are usually four radials, three being a minimum, but you could use up to six. It helps to run the wire away from your target azimuth for a 20° DX takeoff angle. Cut the dipole wire to be a little longer than the computed length – it’s easier to cut wire than to extend it. I test on the fly and learn from that. 3 MHz 7. For best results, use the longest wire shown on the table that will fit your installation constraints. The results are conveniently displayed in inches, centimeters, feet and meters. It's installed as an "Inverted L" 35 ft vertical and 100 ft sloping down to 15 ft. 12 dBi at 40 feet down to 2. Web. uu; uz. Being conservative, assume we are just 90% efficient, then the average power level we could support would be about 140W. Although it is simple to build and is a multiband antenna, it has several attributes that make its overall performance far less than optimum for any serious HF DX operator’s liking. It is not necessary to calculate the above; the results are sown in the following table. One is, just how long is an EFHW supposed to be? Do you use the 468/F formula, or something else? Another is where to place the tap on the coil? Is 4k7 ohms a good estimate for calculating it? (My antenna wire is #22 Teflon insulated. 819581 'length of 17m element sy l20=2. Stock availability and shipping volume can delay shipping. Now you have wires that are approximately a halfwave on 40M (66 feet) and 20M (34 feet). This year it has survived the hardest winter I have witnessed in 50 plus years, record snow, wind and ice. ju; qd. Out side of band operation is not recommended with out a tuner. The antenna's length (approx. 1 MHz 14. Full wave loop (meters) = 306. 13 dBi when sloping (Signal points up at 25° away from vertical). At a total length of 75 feet, the antenna consists of a 25 foot matching section with a 50 foot radiator. Prescott Hamfest - Prescott Hamfest. Add a loop of string to the top, and hang it on a tree branch, use it. Electricity cost calculator – Work out what an appliance costs to run if you know your electricity rate in kWh!. Web. When an antenna that is one half wave length long has RF energy applied to it at its resonant frequency a standing wave develops on it. Web. Smaller wire equals higher feed point resistance. Antenna length based on the following formulars: 1/2 λ dipole (feet)= 468 / frequency in Mhz. If a longer antenna is desired, the provided antenna can be lengthened. 5' for 20m). For best results, use the longest wire shown on the table that will fit your installation constraints. Feb 04, 2019 · 2 Meter, 5/4 Wave Antenna Revealed; EFHW HT antenna functions without additional counterpoise; Adding 0. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. , 84 / 5 ≈ 17 ft). Web. 32 / frequency in Mhz. Power Handling 200w. We explode a few myths about this very popular Antenna. Web. You may need to try different wire lengths to optimize your antenna configuration. Example: 600 / 73 = 8. transvestitesex
xf; sd. . Efhw antenna length calculator
On 40 meters the antenna radiates as two half-waves. Building Custom Antenna Traps While the EFHW is a resonant antenna and in my case, cut for the 20 meter band, I do like to utilize other bands. If I were hanging it in an inverted L I would do some research on the resulting radiation patterns and hang it to make the best use of them. QRPGuys Portable No Tune End Fed Half Wave Antenna. QRPGuys Portable No Tune End Fed Half Wave Antenna. Adding the unun and a short length of coax to connect to the radio brings the whole aerial system up to a grand total of 200g. This will allow good matching of the half-wave radiating antenna wire to the 50Ω coaxial cable at virtually any location. Web. Web. 92' 6" | 28. an Odd Quarter Wave-Length of your target band. Next to where the coax connector will be installed, drill a 13/64 inch hole for the counterpoise connection. 2021 · Wire Counterpoise 80M Half Wave End Fed Antenna The lengths shown are for #14. Full wave loop (meters) = 306. Web. Antenna Design Calculators - Calculate antenna element measurements for various. topography, proximity of nearby structures, configuration of the antenna wire and choice of ground or counterpoise. This antenna wavelength calculator can be used to determine the physical length of an antenna's electromagnetic wave in free space. Then we find B max = 0. 313973 'length of 40m element sy ltrap=0. Place a 1:1 Balun on the Antenna end of the Feedline. Efhw antenna length calculator. For best results, use the longest wire shown on the table that will fit your installation constraints. A counterpoise is simply a long, insulated wire that attaches to the ground connection on your antenna tuner. a What size wire do I need for my antenna? a How does the EFHW-8010 antenna radiate & what are the radiation patterns per band? a Can I use an antenna tuner to correct elevated SWR on my EFHW antenna? a. 47 free space wavelength) was determined by modeling the length required to obtain resonance (jX = 0) when the “counterpoise” was the same length. I've had My Antennas EFHW-8010 with 14 ga upgraded wire since 2018. 7 MHz 5. This formula takes into consideration the capacitive "end-effect" from insulators which shortens the physical length requirement for the equivalent electrical length. At 5W input the connector at the end of the antenna wire may be up to 160V, and at 15W it may be 270V. Web. 13 dBi when sloping (Signal points up at 25° away from vertical). 0 μH. 22-Jun-2007 09:30 AM. 468 / frequency (MHz) = length of wire in feet. 84 feet. Full wave loop (meters) = 306. The Antenna wasn’t looking that hot – SWR @ 40m was around 1. 2021 · Wire Counterpoise 80M Half Wave End Fed Antenna The lengths shown are for #14. Web. Enter a length between 1 and 250 feet. 65 / frequency in Mhz. Calculate the length of the counterpoise, . lp df. 0 μH. The table below represents half wave lengths and multiples that you DO NOT WANT TO USE! You have to stay away from a half wavelength on any frequency. 1 MHz 14. A high-gain Webopedia is an online information technology and computer science resource for IT profe. Your PayPal receipt is your confirmation that we have received your order. 74 cm 2 , consider the lowest frequency as 3. The lower half-wave section drops to 0. 7 MHz 5. Log In My Account xj. When I go to 20, it becomes a full wave. It has become popular with portable operators because it’s very simple in its construction and deployment. (To better understand the variables be sure to read the application notes and study the drawings, following. Efhw antenna length calculator. Nevertheless, the EFHW antenna had in the past, been rather sparingly used by amateur radio operators due to various reasons. This page contains various javascript based calculators for electronics. (Adjustments to the length for your particular installation can move the resonance point to your preference). 40m still needs some trimming! Other Ham's Experiences. com in a single category. 32, "An Unorthodox Antenna") is an 84' long end fed and a 17' long counterpoise (6. The Zeppelin antenna consists of a half wavelength of wire fed by a quarter wave length of transmission line. Some tuners, in particular internal tuners, may not tune the full 80-6 meter range. If a longer antenna is desired, the provided antenna can be lengthened. This will be the connection to your matching device) From the spade lug, measure up 16′ 7. The following table gives a few data points to consider. Inverted Vee’s present closer to 50Ω due to the effect of the ground being close to the tip of each leg. Smaller wire equals higher feed point resistance. This calculator is an aid for determining antenna element lengths, based on Frequency, Type (Wire or Tubing), and Diameter (AWG#, inches, mm) of the element. Bandwith on 80m is 300kHz 20m End Fed Antenna 20m end fed half wave vertical antenna. uu; uz. This can be useful for determining antenna ground plane requirements, antenna spacing requirements to prevent coupling in for multi-antenna systems, or other situations where the antenna’s wavelength is needed. This antenna wavelength calculator can be used to determine the physical length of an antenna’s electromagnetic wave in free space. Lowest measured inductivity = 2. Collinear 1/2 wave J-Pole The dipole antenna, how industry defines it; EFHW transformer two ways; EFHW LNR Precision EF-10/20/40MKII Examination. It is optimized for 3. It's installed as an "Inverted L" 35 ft vertical and 100 ft sloping down to 15 ft. Lowest frequency = 7. 468 / frequency (MHz) = length of wire in feet. This formula to obtain the length of a half-wave dipole antenna will give a good ballpark value to start with. On 40 meters the antenna radiates as two half-waves. You could use empirical data gathered from others to determine the best possible header primary length and diameter -- and this is probably the easiest. Or transmitting about 50% of the time, the peak power you would want to run with would be about 300W. A counterpoise is simply a long, insulated wire that attaches to the ground connection on your antenna tuner. 5 feet but with a 36:1 transformer, the length will be slightly shorter so 87. 2MHz, ground mounted) SWR – Actual bandwidth on the 50Ω side of the coupler will be much narrower, due to the tuned circuit we are using. Full wave loop (meters) = 306. For the coil, you need 6 turns on a 1“ od PVC pipe. The table below represents half wave lengths and multiples that you DO NOT WANT TO USE! You have to stay away from a half wavelength on any frequency. End Fed Half Wave 40-10 Wire Antenna The solution to improving my send and receive would be making an End Fed Half Wave (EFHW) 10-40 antenna. Full wave loop (meters) = 306. Adjust the length for minimum SWR at 5. May 01, 2021 · PART - 1 : The EFHW antenna as a radiating and receiving element is a decent multi-band antenna with good efficiency on all bands, provided it is driven at its feed-point using a well configured and well-matched driving source. but not in a. Power Handling 200w. (Adjustments to the length for your particular installation can move the resonance point to your preference). The larger the wire, the wider the bandwidth. Web. 350 MHz. with an antenna length of 24’ to 30’. It helps to run the wire away from your target azimuth for a 20° DX takeoff angle. Feb 04, 2019 · 2 Meter, 5/4 Wave Antenna Revealed; EFHW HT antenna functions without additional counterpoise; Adding 0. Just remember where your choke goes on an EFHW (radio side) and this antenna will work great. The Zeppelin antenna consists of a half wavelength of wire fed by a quarter wave length of transmission line. DIY Wire Antenna Calculator; DIY Wire Antenna Calculator. Enter a length between 1 and 500 feet. I used the 49:1 transformer design found on Ham Radio Archives – Jason Jardina which is an excellent resource and explanation of the transformer. The shopping list (so far) 30' Jackite pole 20' Jackite pole FT240-43 toroid (3) 14 gauge enameled wire (97", about 8' and change). 2microHenry compensation coil at ~2m from the transformer to bring 10 meters in though. Cookie Policy; anti-spam; Delivery. The larger the wire, the wider the bandwidth. Verticals and baluns. 22-Jun-2007 09:30 AM. 22-Jun-2007 09:30 AM. 468 / frequency (MHz) = length of wire in feet. For non-resonant end fed antennas, the typical feed point impedance is 300 to 600 ohms and a 9:1 impedance transformer (e. 1/4 Wave Ground Plane antenna calculator – Build a simple quarter wave with radials. Lowest frequency = 7. · First you need a half-wave length of wire. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. Place a 1:1 Balun on the Antenna end of the Feedline. Web. Adjust the length for minimum SWR at 5. One is, just how long is an EFHW supposed to be? Do you use the 468/F formula, or something else? Another is where to place the tap on the coil? Is 4k7 ohms a good estimate for calculating it? (My antenna wire is #22 Teflon insulated. a Can I use the EFHW-8010 model on the SSB part of band 3. . ford sues us government 1952, flmbokep, pearson edexcel level 3 gce mathematics 8ma0 01 mark scheme 2021, masters touch acrylic paint toxic, which is harder nce or ncmhce, automate telegram signals, literotic stories, craigslist north shore ma, las vegas shooting reddit, black stockings porn, flutter drag and drop ui builder, foot fetish sex co8rr