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J Pole Calculator

The calculator above will give you a good starting point, although spacing between the elements, velocity factor and other differences will have an effect on where this actually is. Slim Jim vs J Pole. There are many rumours on the Internet, claiming that the Slim Jim has better performance than the J Pole Make the jout of 1/4 soft copper, Solder it in place thru the hole and add the cable. Cost about $6 using new parts. If you need a super j, use a piece of 3/4 pvc as the insulator and add the stub and another 38 or so inches of conduit. still really cheap..... Dave, WB5HDS. Convert a J Pole to a Slim Jim More Antenna Projects 14 thoughts on J Pole Antenna Length Calculator tripp says: January 25, 2021 at 3:58 pm. Could I use copper grounding rod to build this J Pole? Or is copper pipe a better resource to use? Reply. David Stansbury says: January 25, 2021 at 4:43 pm J-Pole Antenna Calculator. Frequency [MHz] Wavelength [mm] Distance A [mm] Distance A [inch] Distance B [mm] Distance B [inch] Distance C [mm] Distance C [inch] Distance D [mm] Distance D [inch] Rod Diameter [mm] Rod Diameter [inch] Notes • If the antenna is to be placed outside, do not use brass Above images show a J Pole built for 1090 MHz using this antenna calculator. Note the coax balan, this is needed to keep current from the antenna off the feed line. This J Pole antenna design beats the quarter wave 'hands down'. Besides better reception (gain) it also uses less space and is easier to construct because it does not need a ground.

Dave's J-Pole Antenna Calculator. Enter your desired frequency and get the calculated lengths from below. For example, if you wanted a general J-Pole for 2 meters, you might enter the center of the 2 meter band which would be 146.00 mhz. If you predominately used the upper side of the 2 meter band you might put 147.00 mhz The J-Pole is very sensitive to conductive support structures and will achieve best performance with no electrical bonding between antenna conductors and the mounting structure. Feed The J-pole antenna and its variations should ideally be fed with balanced line, however a coax feed line may be used if it includes a means to suppress feed-line RF currents The calculator can be used for designing a Super J-Pole antenna for just about any frequency or it can be used for the standard J Pole antenna by leaving out the top section. The Super J Pole yields about 6dB gain + - over a 1/4 wave ground plane by adding one 1/2 wave section to the top of the regular J Pole with a matching section between the two

De J(ota)-Stok Calculator. De frequentie voor de J-stok antenne is MHz de afmetingen A (Lange straler) afmetingen zijn: feet, inches, meters B (Korte straler) afmetingen zijn: feet, inches, meters C (Aansluiting) afstanden zijn: feet. J Pole Antenna Calculator. Online physics calculator that calculates the long, short section, feed point, spacing dimensions values for current frequency

This is an Imperial version of the calculator. See the main page for more information. Slim Jim / J Pole antenna calculator. Frequency MHz Velocity Factor (see text*) vf Actual wavelength inches Wavelength considering velocity factor inches A. Overall length inches (J Pole) inches (Slim Jim) B About J Pole calculator The resource is currently listed in dxzone.com in 2 categories. The main category is Antenna analysis software that is about software,antenna analysis software, for ham radio operators and hams. This link is listed in our web site directory since Monday Oct 11 2004, and till today J Pole calculator has been followed for a total of 48542 times J-POLE BIBANDA/M; UHF HB9CV; UHF HB9; UHF SLIM JIM; UHF J-POLE; UHF LOG PERIODICA; 50MHz HB9CV; 50MHz DeltaLoop; 50MHz 5/8 GndPlane; 50MHz Verticale1/2l; 50Mhz HB9; 50MHz MOXON; 50MHz Dipolo coax; 50MHz Dipolo rigido; 50MHz Dipolo V-Inverted; 50MHz Boomerang; 50MHz dir. 2 elem. 50MHz 2 dir. 3 elem; 50MHz J-Pole; 50MHz Slim Jim; 50MHz Hentenna. J-Pole Antenna Calculator. An omni-directional end-fed half-wave antenna with a quarter-wave transmission line matching stub. Invented by the Germans for use on their zeppelins, this antenna is also referred to as a Zepp antenna

J-pole on eBay - Fantastic prices on J-pole

The J-pole antenna, also called the Zepp' antenna (short for Zeppelin), was first invented by the Germans for use in their lighter-than-air balloons and used on their 1930s airships. Trailed behind the airship, it consisted of a single element, one half wavelength long radiator with a quarter wave parallel feedline tuning stub Building J-Pole amateur radio antennas category is a curation of 90 web resources on , The J-pole Antenna Revisited Yet Again, J Pole antenna for 6 meters, Concealed DSS J-Pole. Resources listed under J Pole category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators History, simulations, measurements and real experiences of the famous, or infamous, J-Pole antenna. Nelson Antennas 2m rollup antenna review. January 20, 2021 January 10, 2021. Review of the smallest portable 2m antenna on the market producing full size dipole performance and stows into your pocket May 13, 2014 - J Pole calculator - Just enter the frequency and get the measurements you need

***IMPORTANT UPDATE - READ THIS DESCRIPTION***I discovered a site on the web (http://www.hamradio.me) where the author, John Huggins, covers some very import.. SUPER J-POLE FOR 435MHz: The Super J-Pole antenna for 430 - 450MHz was constructed and used for FM simplex and repeater operation at my previous residence in Melbourne, Victoria from 2002 - 200 The J-Pole for VHF and UHF constructed with 240-Ohm- or 300-Ohm-Twinlead. The lengths are for 145 MHz and 435 MHz. The 2-m-J-Pole can be used on 70cm, too with an SWR <1,6. SWR 145-146 MHz <1,5. SWR 430-440 MHz <1,6. The dimensions of A, B and C are in the table below.. The Super J-Pole Antenna(Collinear Design) Below is a Javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole. The antenna I constructed was made of 1/2 tubing

Slim Jim / J Pole Antenna Calculator - M0UK

J POLE ANTENNA DESIGN CALCULATOR by K4AB

  1. Fiori Films Presents Ham Radio TV: How Does a J-Pole Antenna Work by Dr. Ed FongEd Fong WB6IQN gives Vaca Valley Radio Club a presentation via Skype. He teac..
  2. The Slim Jim, similar to the J-pole, is in fact a half wave end fed dipole, in the Slim Jim's case, an end fed folded dipole. As with all folded dipoles, the currents in each leg are in phase, whereas in the matching stub they in phase opposition, so little or no radiation occurs from the matching section
  3. Amateur radio / Antenna / J-pole antenna. J-pole antenna . The J-pole antenna consists of a short and a long vertical pole with a feed point near the bottom. The antenna looks like the letter J, hence the name J-pole antenna
  4. 2 Meter Break-a-way J-Pole Antenna. Rated 4.86 out of 5 $ 41.00 - $ 45.00; 2 Meter Slim Jim Antenna. Rated 5.00 out of 5 $ 48.00 - $ 52.00; I'm on a mission to inspire and educate the amateur radio community. Read my blog. Latest Posts. Parks on the air: Brunet Island State Park, WI (POTA

J Pole Antenna Length Calculator - KB3KA

Slim Jim Antenna Calculator. Slim Jim Antenna was designed by late Fred Judd. It uses a matching system similar to j-pole antenna. It is the most effective antenna when compared to other ground plane antennas. It has two electric poles charged positive and negative Super J-Pole Calculator The only modifications I needed to make were to increase the space between the two vertical components by 1/4″ to account for the increase in the size of the pipe (those directions are for 1/2 inch pipe) BUXCOMM J Pole Calculation by BucK4ABT (C) 1992 Center conductor to Long Element and Shield to Short Element. One is for 144 to 148 mHz (model JPOL2) and the other is for 430-450 mHz (model JPOL4). Both models are shown in the following illustration: 2 meter version: 144 to 150 mH J-pole Antenna. Because the J-pole and Zepp are electrically identical in function, and are similar to all other end-fed antennas in problems, pages on J-poles, Zepps, and end-fed verticals overlap. The J-pole and other end-fed Hertz antennas are prime examples of antenna that can have severe feed line common mode current problems The J-pole is an antenna and therefore must be a transformer. If we carefully dissect the J-pole, we can see just where this transformer action takes place. So here we go with step two. Lets break the J-pole into a couple pieces and see if we can get an idea as to how it works. But where should the break be? Our simulation offers us a clue

Online Calculator .:. J-Pole Antenna - Designe

  1. The J-POLE antenna is a quick and easy plumbers delight. Some swear by it but I am sorry , I have never heard one that worked that well. The correct method of attaching the coax is the live to the stub except for some super designs which are really dipoles next to the radiator. Here come the arguments as about half the designs attach to the.
  2. g J-Pole type antenna, constructed from readily available materials
  3. 6 Meter J-Pole from 450 Ohm Ladder Line A quickie project. Sketch copied from WB5CXC web page. The design by WB5CXC offers a balun made from RG-174 coax and a matching section of 450 ohm line. Basically you have a half wave.
  4. J-POLE PARTS LIST PROCEDURE P2 M1 Copper tee joint, 1/2 P3 P4 Copper end cups, 1/2 PART DESCRIPTION QUAN TITY C1 Solid solder wire, 50/50 C2 Solder paste C4 Sand paper, fine S1 UHF connector S3 Brush for soldering paste Paper tower S5 Torch for soldering S6 Metal sheet for dripping solder S
  5. slim Jim and J Pole calculator. 2002 - 2020 i1wqrlinkradio.com Home Mapsite Add Link. Contact. slim Jim and J Pole calculator. Before we start, be prepared to experiment! The calculator will get you close or spot on if you're lucky, but there are so many variables. post 28 Sep 2020
  6. TWIN-LEAD J-POLE VHF ANTENNA This is a design from an article by W9VZR in 73 Magazine ©, August 1977, P. 60 RADIATOR, 1/2 Wave 300 Ohm Plastic Twin-STUB, 1/4 Wave A B <— NO CONNECTION, CUT AND REMOVE TO END —> To A To B 50 Ohm Coaxial Cable FREQUENCY (MHz) RADIATOR (Inches) STUB (Inches
  7. Super J-Pole Antenna This antenna was developed by the Independent Repeater Association in Des Moines, Iowa, for use on its many repeaters, nodes, and BBS. We thought some of you may be interested in it. The cost to build this antenna is less than $2. 52 MHz 146 MHz 446 MHz 915 MH

6 J POLE ANTENNA; DINENSIONS ARE FOR 51 . Title: A 6 Meter J-Pole Antenna Author: K4ABT Created Date: 5/2/2004 4:33:07 PM. J Pole calculator by dxzone.com I don't even know if it will work in that bandwidth - but it might be fun to exxperiment if you have a lot of copper tubing lying around. At 26 ft, you wouldn't need to put it up on a mast, just make a stable stand for it on your roof A calculator for constructing a J-pole or Slim Jim antenna. I made one for 4m (70MHz) which is 3 metres long! The quarter wave matching section can be made horizontal, with the half wave radiator section vertical, 90° to it if space is an issue An Even Better J-Pole - Electrically • The gain is about 7.4 dBi. This value is about 2.3-2.4 dB higher than the average gain of a single-radiator J-pole. Indeed, although many folks like to bandy the gain advantage of a collinear arrangement as 3 dB greater than a single section, we rarely obtain in real antennas more than about a 2.0-2.5 d 2 Meter 3D Radiation Plot (Computer Model) 70cm 3D Radiation Plot (Computer Model

Our flagship model, The Two Meter J-Pole Antenna comes in two different configurations, either as a one piece antenna for base station use, or as a two piece breakaway model great for portable operations. The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. Works well with handheld HT radios, base stations, and repeaters. Ruggedly. J-Pole Antenna Schematic (courtesy: wireman j-pole DK7ZB) Despite the long history and popularity of this antenna, there seem to be a lot of confusion about what this is and how it works. For example, confuses this antenna with Zepp antenna, an end-fed wire antenna, which J-pole may have its conceptual origin but they are not the same thing J-Pole Antennas I am now making only a few antennas for sale - $35 local pickup only, no shipping. Email to inquire. Order Now! New Snow Cone - Protects the driven element from rain, snow, and ice! The K9JEB Snow Cone keeps the rain and snow off of the driven element Slim Jim / J Pole Antenna Calculator. Calculate the dimensions for a Slim Jim or J Pole antenna for HF, VHF or UHF - Including velocity factor! Saved by Huey Stanfield. 39 Free Online Engineering Calculator to find the Dimensions for a folded dipole

J pole shown in Figure 1. This can be best explained by a 19 inch 2 meter vertical over an ideal ground plane. At 2 meters, it is a λ/4 length vertical (approximately 18 inches). At UHF (450 MHz) it is a 3λ/4 vertical. Unfortunately, the additional λ/2 at UHF i The airband J-Pole antenna is tuned for the 118 - 128 MHz aircraft aviation band. Aviation fans prefer this antenna as it works well picking up both land based and airborne transmitters. Many Live-ATC sites are using this antenna to stream aviation transmissions to the Internet

J pole antenna per 50 Mhz, IK1ZOY: J-pole 144-146 Mhz, I0FPP: J-pole 144Mhz, I5BHN: J-Pole Antenna Design: J-Pole Antenna: J-pole antennas for 2m-40m with Wireman-cable, DK7ZB: J-pole broadcast fm 89 Mhz: J-pole 145 Mhz,VHF antenna: Slim JIM 145mhz, F1RFM: Slim jim antenna project: The J-Pole Antenna, AA1ZB: The Super J Pole Quagi: Calculator J. Q: I built the dual-band J-pole antenna from the article in the September 1994 New Ham Companion (An Easy Dual-Band VHF/UHF Antenna, page 61), but I just can't get it to work. What can I do? A: Try adding a balun to the coax. A balun is necessary because a J-pole antenna uses a balanced feed (th My OSJ 146/440 J-Pole went through 3 hurricanes in 6 weeks, with gusts speeds, on occasion, as high as 153 MPH. No damage at all, and it kept right on ticking j-pole antenna super j-pole antenna cubic quad antenna arrow antennas dual band j-pole note: this antenna was disigned by arrow antennas and it works great. this is the best dual band j-pole ever built 2m - 70cm direct connection beam dimenisions.

The calculator helps you determine the number of people you need to survey (your sample size calculation) based the level of accuracy you want to achieve. Accuracy is determined by the following three variables: 1. Population size Apr 25, 2018 - Calculate the dimensions for a Slim Jim or J Pole antenna for HF, VHF or UHF - Including velocity factor! More information J Pole Antenna Calculator by M0UKD.co Here is a J-Pole antenna that I built back in November of '09. This build was taken from QST, September 1994. The author is Jim Reynante, KD6GLF. A PDF of the file can be found at the bottom. I am not going to go into how I made it. You can read that for yourself. Characteristics. The J-pole antenna is an end-fed omnidirectional half-wave antenna that is matched to the feedline by a quarter wave parallel transmission line stub of Lecher system form. Matching to the feed-line is achieved by sliding the connection of the feedline back and forth along the stub until an impedance match is obtained. Being a half-wave antenna, it provides a small gain over a.

9M2PJU: Slim Jim & J-Pole Antenna Calculator By M0UKD

J Pole Antenna Design Calculator - Jeroen Steema

stub-j-pole-project-completed-many-times, Jeff had the same idea as we did. He decide to redraw the plans and he provided all of the needed dimensions. This made it all to easy for us to build the antennas. Materials • We looked for the aluminum solid rod from some online sources but do t J POLE ANTENNA DESIGN CALCULATOR by K4ABT . President Trump's sister says he has 'no principles' and 'you can't trust him' stg58, Jul 9, 2015 #1. Marck, Dont, Yard Dart and 2 others like this. whynot Monkey+++ I was planning to make one for the house after I get my license The lower half of the j-pole was a #14 wire just bent in a U shape then i used a dual wire block connector and secured it to the wood via small screws, i then attached the to longer wires into the same wire block connector one wire in each side, and secured the terminating screws on the block, then i just used wire/cable tac's (white with 1 nail at each end) and just hammered them in, about. Building and experimenting with antennas can be an interesting part of the radio hobby. Here we have collected some links to building instructions for 11m antennas on the Internet

w5taz projects

Dave's J-Pole Antenna Calculator - DaveGardner

J-Pole Antenna Calculator - calc

Slim Jim / J Pole Antenna Calculator. Calculate the dimensions for a Slim Jim or J Pole antenna for HF, VHF or UHF - Including velocity factor! Saved by William Paden. 1. People also love these ideas. J-Pole antenna for this station, I used a stan- dard 1/4-wave ground plane vertical antenna. While there is no problem working the vari- ous repeaters around town with my 1/4 wave antenna, simplex operation left a lot to be desired, so I felt something with a little more gain was necessary. Hence the switch to the J-Pole

Aug 20, 2017 - Calculate the dimensions for a Slim Jim or J Pole antenna for HF, VHF or UHF - Including velocity factor a longer J-pole in non-standard form does not yield the benefits of lengthening a vertical monopole over a buried ground plane. The J-pole configuration tends to increase high angle radiation so as to negate the value of the added radiator length. Results with this J-Pole antenna may vary J-Pole Antenna Plans (these files are now located on our web server) Dual Band Jpole.jpg Easy VHF-UHF Antenna.pdf Generic J-Pole Calculator.gif J-Pole for 146 MHz (BuxComm).gif J-Pole Theme.pdf J-Pole with VSWR Adjustment.gif Plumber's Delight Copper 2m J-Pole.pdf Simple 2m Copper Pipe J.pdf The DBJ-1 Dual Band J-Pole.pdf TV Twin Lead J-Pole.gi The J-Pole can also be built for 6 and 10 meters using the formulas and cut it a little longer and have some fun with it! This site is ©2019 The Lakeland Amateur Radio Club, Inc., a 501(c)(3) and Florida non-profit corporation Apr 23, 2018 - This Pin was discovered by Ron. Discover (and save!) your own Pins on Pinteres

Dual Band (2 Meter/70 cm) Solid Aluminum J-Pole. Parts Needed. Radio Shack # 21-961 3/8-24/SO239 Mount (Mobile CB Antenna) Radio Shack # 15-826 TV Mast U-Bolt Clamp Assembly About 85 inches of 3/8 diameter Solid Aluminum Rod. 5 1/2 inch piece of strut angle Aluminum 1 1/2 X 1 1/2 X 3/16 4 Stainless Jam Nuts 3/8-24 thread (or 3/8-16 The half-wave dipole is very simple to construct. Use 75 or 50 ohm cable to feed the centre of the dipole. This could be 50 ohm types such as RG58, RG8X, RG8, RG213, or 75 ohm type such as RG11, RG59, RG6 or even 75 ohm twin lead John Simpson, KG4ZOW Download source code for this program Moxon algorithm and diagram are from http://www.cebik.com/moxon/moxgen.html AWG Conversion algorithm from. J-pole antennas are said to have greater low-angle radiation and gain versus a half-wave dipole. Claims of gain from 1 to 5 dB are seen in write-ups, but are not substantiated by sophisticated measurement and good theory.Neverteless, it makes a great antenna for emergency or on the cheap

Super J Pole Antenna Calculator - Design a Super J Pole

Building A 2-meter J-Pole Antenna

J-stok antenne berekeningstabe

J-Pole Antenna Plans The J-Pole antenna is fundamentally an end-fed 1/2-wavelength antenna that uses a 1/4-wavelength long transformer section to supply the very high feed voltage. It is an ideal end-mounted, single-mast antenna. For 3-meters (FM broadcast band) it is probably the antenna that is the best solution for many micro power radio stations The following is a description of a J-Pole antenna made from 300 ohm TV twin-lead. They have quite a few advantages which include improved performance for HTs, portability, and low cost. | | do not short this end. | | (when trimming for vswr, cut both sides) | | | | | | 3/4 | Continue reading 300 ohm Twin-Lead J-Pole Antenna Design This page contains a calculator that will give you the appropriate length of each segment in the drawing. It uses the base reference frequency of 14.24 MHz and directly scales the length of each segment based upon your desired operating frequency Copper Cactus Dual-Band Super J-Pole Antenna Projec t Your going to like this super J-pole project, This home made j-pole is easy to build and sturdy, While looking for an jpole antenna project to build I remembered seeing a Marine antenna called the Super J-Pole in the 1988 ARRL Antenna Handbook, which claimed a 6 db gain over a quarter wave ground plane The calculator will also produce results like section modulus (Z) and the statical moment of inertia (Q) for your sections. Finally, the result for Torsion Constant (J) will also display using this tool. The SkyCiv Section Builder will also produce these results accurately using FEA analysis of the cross section

The J Pole Antenna - Build one for the HF Bands - 17, 15

J Pole Antenna Calculation Calculate Dimensions for

Free Online Engineering Calculator to find the Dimensions of a yagi Uda Antenna for a given Frequency Range and Length. Yagi Uda Antenna Calculator You may want to combine it with a folded Dipole Alpha Rubicon - An Online Community for over 21 years, providing advanced knowledge about disaster preparedness issues. We give you the knowledge you NEED to help you prepare for disasters 70cm Copper J-Pole. It took a bit to tune. I thought I needed to be much lower for 440Mhz but I guess I was wrong. I'm getting 1.1 to 1.5 throughout the 70cm band. I hooked it up to HT and with the antenna perched on my desk I was able to work repeaters that I've couldn't with just the HT and it's antenna j pole antenna calculator mono 1 2 wavelength antenna calculator 1 2 mono-pole antenna calculator vertical antenna on-line calculator antenna coil calculator hf helical antenna calculator hf vertical antenna calculator microwave antenna position calculator antenna length calculator

Slim Jim and J Pole calculator (American Version) - M0UKD

A resistor-inductor circuit (RL circuit), or RL filter or RL network, is an electric circuit composed of resistors and inductors driven by a voltage or current source.A first-order RL circuit is composed of one resistor and one inductor and is the simplest type of RL circuit. A first order RL circuit is one of the simplest analogue infinite impulse response electronic filters Looks like a J(well, a backwards ^J in this illustration) Make it out of wire and hide it in a tree Check reference section for websites that include a J pole calculator for Cu tubing like what was built as shown in the next slid Well, not only did the J pole pull in all that I was hoping it would, it exceeded my expectations. Now I receive two different short lines, Austin & Western and the Georgetown Railroad, I am also getting UP from much further away than I expected, but I am also picking up some BNSF traffic which is far enough away that I wasn't even expecting to get any of their traffic 70cm J-Pole Antenna Project by John M0UKD. J Pole Antenna Calculator by M0UKD.com Poster 4EB146 simple wire antenna that work Electrical and Electronics Engineering: VHF Vertical Antenna 10sd156 Leon Guanajuato Mexico: DIAGRAMAS DE ANTENAS Homebrew Collinear Antenna - from just a piece of solid copper wire! FRACTION TO DECIMAL AND MM TABLE J.

70cm J Pole Antenna | Ham radio antenna, Ham radio, RadioRADIO SELLER: J Pole Antenna for CB 27 MHz = 11 Meter or
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