🎊 How To Build A 2 Meter Yagi Antenna

^{DIY5$ Portable VHF Yagi Antenna for the 2 Meter Band (144-146 MHz) by F4HWK Step 1: Materials and Tools. All you need for this antenna are 3 pcs of 4 mm diameter threaded rods, a PVC bar with a Step 2: Dimensions. All dimensions are given in mm on the first figure. The antenna is a Yagi type} ^{DrivenThree Element Yagi The performance improvement over a standard two element wideband Yagi with the same boom length comes at a price — an extra element and a phase line. If we were working with a 40 meter Yagi, the third ele-ment would add a considerable load on the mast and rotator. At 10 meters, however, ele-ments are much lighter.}

Referringto Fig 2b above, the measurements shown in black are the overall assembled dimensions of the antenna (as measured between the centres of the tubing). The measurements in red show the actual size of each of the tubing sections.Cut the straight sections from 12mm tubing. The 12 mm tubing is available in 3m lengths and you should be able to cut one antenna from 2 x 3m lengths with a

^{Makea 4″ X 4″ X 1/8″ plate of aluminum for your boom to mast plate. Mount four appropriate size "U" bolts and saddles on the four edges of the plate. Mount the boom to mast plate at the center of the boom. Make the elements horizontal and attach the assembly to a mast 5 or so feet above ground. Finished Antenna.} The3 element 2 meter (designed for 146mhz) quad in this project has a very small footprint (boom length) of about 32 1/4 inches and according to the computer guru's out there, it has about 9.45dBi gain with only three elements. 9.45 dBi equates to 9.45 - 2.15 = a whopping 7.3 dbd gain with over 20db front to back ratio and a 2:1 swr bandwidth Asa fan of home-brew ham antennas, my design "mantra" is to now use a balun on ALL antennas, even commercially- build antennas. One might use a 4:1 balun, for example, for the needed impedance transformations in an OCF HF dipole, but for most other balun applications, a simple coiled-coax 1:1 choke balun works very well. . 108 66 449 33 295 75 442 269

how to build a 2 meter yagi antenna