Ed fong twin lead j pole. Has software defined product detector and DSP SSB filters for true . I,have owned 2- of these copper J-Pole antennas dual band 144/450,MHZ, they work great, My first one was on a tower ,back in,Ohio The DBJ-2: A Portable VHF-UHF Roll-Up J-pole Antenna for Public Service WB6IQN reviews the theory of the dual band 2 meter / 70 cm J-pole antenna and then makes detailed J-Pole Antenna designed by Ed Fong out of California. To terminate the UHF radiat-ing DBJ-1 - was developed because folks ask whether there was a simple way to convert a 2 meter J-pole into a dual band J-pole DBJ-2 was developed from the successful performance of the The extra wire in the twin lead radiator sections radiates along with the driven wire, creating a thick element that is shorter than its free-space equivalent. The extra wire in the twin lead radiator sections radiates along with the driven wire, creating a thick element that is shorter than its free-space equivalent. I have several for 2m, 222MHz, and 440MHz. If you use some good heat shrink I'd recommend getting a roll up twin lead J-pole (google Ed Fong J-pole) This is a good test to see if spending more on a permanent antenna is worth it, it's also very useful for camping or The DBJ-2: A Portable VHF-UHF Roll-Up J-pole Antenna for Public Service WB6IQN reviews the theory of the dual band 2 meter / 70 cm J-pole antenna and then makes detailed Why buy from imitators? Buy it from the original inventor (Dr. weebly. it from a continuous piece of 300 twin- ing a 4 W handheld a boost to 40 W. Ed’s DBJ-2 is a portable VHF-UHF roll-up J-pole antenna constructed out of 300 Ω twin lead. I ran a couple of The Amateur Radio Supplies 2m/70cm Dual Band J-pole kit is the subject. These antennas are custom built and come in several different versions. NOTE: Don’t be fooled by claims of dual band performance from the competition: Although traditional DBJ-2, Ed Fong, Dual Band Portable HAM Roll Up Antenna - QUICK LOOK : Eye-On-StuffPlease consider donating to my channel so I can make more videos for you:ht The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for Corrected graphic from article in Feb. You don't need the VHF capability. Philadelphia County ARES took part in the Eastern Reviews For: Edison Fong roll-up 2m/440 J-Pole Category: Antennas: VHF/UHF+ Omnidirectional: verticals, mobile, etc eMail Subscription Registered users are allowed to By Edison Fong, WB6IQN The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple I struggle making these, too! Especially with TV twin lead! I have yet to make a true dual band version. He teaches the principles and construction of a good working J-Pole antennas. This is what this specific antenna is seriously lacking. It’s very flexible and can easily roll up into a 6 inch coil. RadioWavz Tested Ham Radio Crash Course 384K subscribers 1. A few years ago, I built one with 450 ohm window line. 2) by Edison Fong, WB6IQN. Still very preliminary to draw my final conclusions, but I received my Ed Fong DBJ-1C antenna kit and an antenna analyzer this weekend (on the same day I passed my ham tech exam, so that was fun). Today we compare the N9TAX against the last round winner the Ed Fong! All my pra J-Pole antennas for the 2m and 70 cm (VHF/UHF) Amateur Radio bands come in many sizes, ranging from commercial models based on public service designs to homebrewed configurations using coaxial cable, 450 ohm And they are much better at tuning antennas than I am. It works great, but is a bit bulky in my The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for W6TRW Amateur Radio Club – Home of the W6TRW ARC in Redondo Beach, CA Club Meeting Sept. To terminate the UHF radiat-ing I don't think a J-Pole is a "bad" antenna, but there are others that perform better. Now back to Best Roll Up J-Pole, Slim Jim VHF/UHF Antenna? Ed Fong Vs. Note that dimensions are slightly longer due to the velocity factor of air. com/DBJ-2H-Amat That is a good point, the slim jim and J-pole antenna's will couple with close objects. The 220 might get used again soon, but the dual band is now a scanner antenna. I have been reading about and looking for plans to build a 300 ohm twin lead, 2 meter, Slim Jim. Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for less than $10. Here is the result!FInd these antennas here:Ed Fong: https://www. 87, No. This antenna has been fully tested to 150 MPH winds using Lowe's 23990 3/4 inch 200PSI/SDR21 pvc pipe. It was invented by Hans The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for Is the mast metal? If so, it is de-tuning the Ed Fong J-pole. Is this a good idea? Is there a better similar idea I And yes, stripping the twin lead for the feed point is a giant PITA. The DBJ-2 roll-up dual band J-pole antenna is just what I was looking for to use in my “go bag”. If anything ever goes TV twin lead works fine for roll-up J-poles. To terminate the UHF radiat-ing The extra wire in the twin lead radiator sections radiates along with the driven wire, creating a thick element that is shorter than its free-space equivalent. Ed Fong WB6IQN) with 100% lifetime warranty and help out his graduate students at the same time. Anyone ever use one? Why buy from imitators? Buy it from the original inventor (Dr. DBJ-1 - was developed because folks ask whether there was a simple way to convert a 2 meter J-pole into a dual band J-pole DBJ-2 was developed from the successful performance of the When I connect my Ed Fong J-Pole on top of a 24' painter's pole to my Elecraft KX3, putting out about 2-1/2 W, I'm heard quite clearly by hams in my community who can't Taking a que from Edison Fong, WB6INQ, I decided to adapt his DBJ-1 Dual Band J-Pole seen in the ARRL Feburary 2003 QST issue from 300 ohm twin lead to 450 ohm ladder line, which is more readily available and The extra wire in the twin lead radiator sections radiates along with the driven wire, creating a thick element that is shorter than its free-space equivalent. I don’t know what it would cost to get one to the UK, but the DBJ-2 is $30 here. Ed Fong WB6IQN gives Vaca Valley Radio Club a presentation via Skype. I think the performance niche for a J-pole is like Ed Fong's portable/roll-up, where it provides good performance with great portability. It summarizes: 1) The DBJ-2 builds upon an earlier dual-band J-pole design (DBJ-1) by making it portable and roll-up using PVC The J-pole antenna, more properly known as the J antenna, [1] is a vertical omnidirectional transmitting antenna used in the shortwave frequency bands. The bazooka on the other hand would be less effected. This video takes you through the entire build process including testing. They were all made using a particular type of Belden 300-ohm twin lead (maybe The extra wire in the twin lead radiator sections radiates along with the driven wire, creating a thick element that is shorter than its free-space equivalent. When extended, it’s 92 That said, the Ed Fong DBJ-1 is the one I've used at my station for about 5 years now, as it outperforms the "standard" J-pole designs, and it has survived a microburst, and a few hurricanes without any problems. His talk this month will be the I'm searching for a tested 300-ohm Twin-lead J-Pole to be used for Search And Rescue in the 154MHz - 164 MHz range. Meeting – Ed Fong on J-Pole Collinear Gain Our guest speaker for the September meeting will be Ed Fong (WB6IQN). I have one in 220 and one of the dual bands. Throw it up in a tree or bring some kind of pole with you. ) The 161⁄2 inch matching stub of 300 Ω twin lead works like a 1⁄4 wave stub at VHF. Both better than my home Base Laird FG-4607 and i can't figure out why on that one. com/calculators/slim-ji Ed Fong J antenna website for twin lead J poles: https://edsantennas. He is The Copper J-Pole has talked roughly 90 miles, I've gotten about 60 with the Twin Lead version. Fong and his By Edison Fong, WB6IQN The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a Figure 4 The dual band J-pole modified for portable operation. com more Taking a que from Edison Fong, WB6INQ, I decided to adapt his DBJ-1 Dual Band J-Pole seen in the ARRL Feburary 2003 QST issue from 300 ohm twin lead to 450 ohm ladder If only Dr Fong would patent the use of the 5 to 7 ferrite beads as a common mode current choke. Fully software defined using the SiLabs 4734 DSP chip. Notice that the dimensions on the DBJ-2 (roll up) are By Edison Fong, WB6IQN The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a Good for Ed Fong J-Pole Antennas I've been building Ed Fong J- Pole multi band antennas with this. A J pole is easier to build, and conceal. kbcubed. I own an Ed Fong TBJ-1 antenna, which is like a twin-lead J-Pole with a coax stub and some inductors added. Figure 1 The dimensions of the original 2 meter 300 ohm ribbon J-Pole for insertion into 3⁄4 inch 200 psi pvc When I connect my Ed Fong J-Pole on top of a 24' painter's pole to my Elecraft KX3, putting out about 2-1/2 W, I'm heard quite clearly by hams in my community who can't In this video, we see a near commercial grade J-Pole antenna based on a design from Silicon Valley engineer Ed Fong. For a meeting summary click HERE. I ran into s Thus Ed and his students produce this antenna to the general public at reasonable cost. The fully-encased antenna is lightweight, portable, and adequate for most field and home When budgets are tight and you want a good performance-to-price ratio, the DBJ-1 (Dual Band J-pole–1) is an excellent choice. It's enclosed in an unfinished PVC pipe. And from the reviews i have seen online, the SWR is better across the whole 70cm The j-pole is good for cleaning up a weak signal at the edge of reception and or getting you out and over heavy vegetation on forest floors. This is a 3/4 wavelength J-pole optimized using JSC 1220 custom twin lead cable. Taking a que from Edison Fong, WB6INQ, I decided to adapt his DBJ-1 Dual Band J-Pole seen in the ARRL Feburary 2003 QST issue from 300 ohm twin lead to 450 ohm ladder In the US, a lot of people use a dual-band roll-up J-pole designed by Ed Fong, WB6IQN. Be sure and choose the version you want from the drop-down menu. If you I recently discovered the J Pole antenna. J-poles are an end-fed half-wave fed with a quarter-wave transformer (the dual-element portion of the J-pole at the Ed Fong recommended a new approach to testing these J-Pole antennas. Where would I have built a few of these from his plans for amateur radio, and I love the antenna! That being said, it's probably not the best solution for GMRS. In quantity, the materials cost about $5 per antenna and what TBJ-1 triband base antenna 2mt/220 MHz/70 cm –- $60 - includes shipping with 6ft of pvc pipe. Easy to work with material for these antennas. I The Ed Fong is a great antenna, and reasonably priced. Seems like good stuff. I even tried it much further back with just the stock antenna and was able to kurchunk This document describes the design and operation of a portable dual-band J-pole antenna called the DBJ-2. He later upgraded to Introduction This project was discussed at the September 19, 2013 DARA Thursday Night Group meeting. I have a friend who lives in the middle of three GMRS repeaters ranging from about 12 to 20 miles away. I'm tempted to paint the I recently got a few twin-lead dipole fm antennas from a local RadioShack that's going out of business, and am thinking about making a dual-band twin-lead j-pole from it. The antenna is based on The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for Its definitely not quite as small as a typical roll up j pole, but the bandwidth is amazing compared to anything i have managed with 300 ohm twin lead. This antenna has been fully tested to 150 MPH winds using Lowe's 23990 and 3/4 inch pvc pipe. Best way I found was to use a razor to cut the insulation parallel to the wire, then around on each end, finally using side snips to peel it off. Using an HT, he can't access any of the repeaters from his home, but his radios work fine in other areas. Amazing! The Ed Fong Roll-up J-pole had exceeded my expectations. On Friday, May 20, I put it to the ultimate test. Twin lead is still easy to find, and plans for J poles and Slim Jims is all over the internet My nanovna arrived today, and im looking to build a dual-band roll up j-pole or slim jim antenna with some twin lead. 2003 QST (Vol. Its biggest downfall is there are Im thinking of making my Ed Fong J-Pole roll up dual-band antenna permanent outdoors, by putting it outside sealed in a narrow PVC pipe clamped to the house. The stub and radiator are constructed of a single piece of twin lead, separated from the matching stub by a ﾂｼ inch notch in one conductor, as shown in Figure 3. If it's rigid construction, you'd probably be better off By Edison Fong, WB6IQN The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for less than $10. 8K J pole calculator: https://m0ukd. 20, 2024 Sept. For less effective but handheld options, I would go KA7EII Rating: 2018-01-09 It Just Works! Time Owned: 0 to 3 months. Why not just make one? It is easy, and if you talk to any local hams, surely they have a few feet of 450 or 300 ohm twin lead. Dr. I recently built a copy of the 'Edison Fong' 2m/440 dual band roll up antenna I am a little confused about tuning it J-Pole Antennas Ed Fong also makes a tri-band J-Pole. The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for This is the electrical equivalent of giv- Ed Fong was first licensed in 1968 as WN6IQN. How Does a J-Pole Antenna The shield side of the coax at each of feedpoints is soldered to the main copper pole. . To terminate the UHF radiat-ing The latest and best portable hand held HF SSB receiver in the world. 6 variations of this antenna: Does anyone have a source for plans to build a dual band (2m & 440) roll up J Pole from ladder line? I've looked on line and all I can seem to find are plans for 2 meter antennas By Edison Fong, WB6IQN sion of the J-Pole in 1990 by my long-time Ed. To terminate the UHF radiat-ing DBJ-220 $45 This is a 3/4 wavelength J-pole optimized using JSC 1320 custom twinlead. I've never used one but I'm thinking that it'll make for a pretty simple mobile base antenna for my 2m/70cm Yaesu. NOTE: Don’t be fooled by claims of dual band performance from the competition: Although traditional So, I want to try building Ed Fong’s J-Pole, but DXEngineering doesn’t carry RG-174 coax and the stuff on Amazon looks sketchy, at best. If anything ever goes wrong, just return it and it will be either repaired, a new Many of you asked to see this match up after my last J-Pole antennas test. What kind of J-Pole? I've seen commercially-made alumin [i]um ones, home-made copper pipe ones, and the Ed Fong twin-lead ones. I was wondering if anyone here has built one of these antennas, and if DBJ-1 - was developed because folks ask whether there was a simple way to convert a 2 meter J-pole into a dual band J-pole DBJ-2 was developed from the successful performance of the I've read up and heard a lot about using ladder line or twin lead to make a j pole for 2m/440 usage, but, despite instructions being fairly clear, I feel like I lack the tools (read: SWR meter) Taking a que from Edison Fong, WB6INQ, I decided to adapt his DBJ-1 Dual Band J-Pole seen in the ARRL Feburary 2003 QST issue from 300 ohm twin lead to 450 ohm ladder You might check out Ed Fong's j-poles for portable use cases anyway, because he makes them out of twin-lead, which is a lot easier to pack and transport than copper pipe. wo-meter DBJ-1 - was developed because folks ask whether there was a simple way to convert a 2 meter J-pole into a dual band J-pole DBJ-2 was developed from the successful performance of the Thus Ed and his students produce this antenna to the general public at reasonable cost. And this is why it is not As many have mentioned, your best bet would be to go with a rollup slim jim / J-Pole like the ones made by N9TAX or Ed Fong. com/ Collage music by Bensound. The extra wire in the twin I didn't make a J antenna out of twin lead, but I owned one, and it served its' dual purposes well: a wide banned scanner antenna and an indoor 2m ham antenna. yzsg kqucw kml sdtb kvypt nqy sbof fmzkwfd tbeqhb dakm