4 element tape measure yagi pdf

Hurst amateur radio club uhf tape measure yagi foxhunt antenna. Very complicated yagi designs were developed to give adequate gain over the broad television bands. For more information on tape measure yagis, check out the following. Jeffrey bail nt1k a simple yet effective 3el vhf yagi directional antenna that could be used for direction finding, sota, emergency communications and other things that needs an improved antenna for your. A fiveelement quad antenna for 2 meters by jim reynante. Simply twist the tape so it disconnects from the spring. Tape measure or yard stick soldering iron and solder cable ties glue.

The elements are made from ordinary smallwidth tape mea sure material. A simple 4 element 2 meter yagi made from coathangers or other common materials by pete rimmel n8pr. Summary of contents for steppir 4 element yagi page 1 6whss,5 z vertical yagi dipole patent pending steppir 4 element yagi installation instructions steppir 4 element yagi at dayton hamvention, 2003 steppir antennas 23831 s. For a balun, 4 or 5 turns of the coax feed wound round the boom should do the trick. With a gain of approx 7dbd it is the equivalent of multiplying your transmit output power by 5 compared to a half wave dipole. One piece will be 41 38 inch and the second will be 35 18 inch. These are the reflector and director elements for your yagi. Once you have cut the tape measure to length, put vinyl tape on the cut ends to protect yourself from the sharp edges. Jul 19, 2015 dual band tape measure yagi antenna july 19, 2015 amateur satellite, antennas, ham radio amateur radio, antenna, ham radio, satellite, saudisat 1c, so50, yagi michael while i wait for my arrow antenna to arrive, i thought i would experiment and build a dual band tape measure yagi since i already had most of the parts on hand. Easytobuild tape measure yagi for direction finding. You will need to secure a suitably sized washer to the anvil to punch through the tape.

First measure and cut some wire or rod to the dimensions we need. Tape measure yagis so named because the elements are made from. An easytobuild tape measure yagi for direction finding. Feb 28, 2015 first, thanks to k7xrl for sharing your take on the tape measure yagi. It is most convenient to use at least a 10 foot tape measure. Some tape measures are larger than others, so you have to choose carefully. After seeing a lot of articles written about making a three element yagi using pvc and a tape measure, i was interested but not excited about it. So with a little experimentation i found out that 19mm tape can be simulated as mm circular elements. A major drawback was the yagis inherently narrow bandwidth. Measure and cut the four lengths you will need for this antenna cutting chart below.

The driven element is made up of two pieces, so cut two pieces that are 17 3 4 inches long. Cheap yagi for 70 cm build this cheap and easy satellite. That was until i made a qso with k1maz nick while he was doing a sota activation. But the tape measure is far away from being circular.

If you would like to experiment a bit with this program, the yagi specification file for this tape measure beam is available for download here. Jan, 2014 when the antenna is needed, the tape measure sections naturally unfold and function extremely well with a 7 db directional gain and can be adjusted to get a 1. A fiveelement quad antenna for 2 meters by jim reynante, kd6glfpo box 27856san diego, ca 92198 if your station is located on the fringe of the repeaters coverage area, youve come to the right place. In the next three steps, mark both side panels to show where the elements will pass through. Each motor has two wires for each of its two motor windings. The long elements do need 2 meter tape measure transmitter hunting the two. This project is unusual, so its something that will certainly capture the attention of anyone, particularly a k. Some are based on lookup tables, some completely hide their algorithms. Figure 4 gain, front to back and front to rear ratio of the stock maco 4 element yagi from 27. The spring will recoil into the case and the tape will be ready for trimming. Often by changing the controller frequency, while keeping the transmit. At the may 6, 2011 clovis amateur radio pioneers monthly membership meeting, rob ae6ge demonstrated how easy it was to construct a 2meter 3 element yagi antenna from a tape measure.

The tapemeasure antenna is a simple, handheld 2 meter yagi. Forming the holes in the tape is a breeze if you have a leather hole punch tool. Cheap yagi for 70 cm build this cheap and easy satellite downlink antenna by richard f. Completing the package for the gokit are a pair of lines to haul the tape measure up and down, and a set of ground a tape measure vertical antenna feed the end of the tape and tune for minimum swr by hauling the. Simply rotate the tape till the tab of the spring can be slid through the slot in the tape. Listed under the antennasvhf uhf category that is about antennas for vhf uhf bands. Tape measure yagi beam antenna parts list 1 25 foot 1 inch wide steel tape measure 1 10 foot piece of 3 4 inch schedule 40 pvc tube 2 3 4 inch pvc cross connectors 2 3 4 inch. It is the feed point where feedline is usually attached from transmitter. Once you have cut the tape measure to length, put vinyl tape on. A simple 4 element 2 meter yagi made from coathangers or other. It is quite possible, that other calculators deliver slightly different results.

Pg1ns ham radio site 2m projects directional antennas. They can be made using various materials and in varous sizes. First, thanks to k7xrl for sharing your take on the tape measure yagi. A simple 4 element 2 meter yagi made from coathangers or.

Dual band tape measure yagi antenna july 19, 2015 amateur satellite, antennas, ham radio amateur radio, antenna, ham radio, satellite, saudisat 1c, so50, yagi michael while i wait for my arrow antenna to arrive, i thought i would experiment and build a dual band tape measure yagi since i already had most of the parts on hand. Figure 1 dual purpose, dual boom portable tape measure yagi for 2 meters. This test assumes the antenna is connected to one end of the control cable and the measurements are taken at the 25pin connector that mates to the controller. Use the combination square to measure and mark on the top edge nonfactory edge 1 4 inch in from the wide end. Tape measure yagi beam antenna parts list 1 25 foot 1 inch wide steel tape measure 1 10 foot piece of 34 inch schedule 40 pvc tube 2 34 inch pvc cross connectors 2 34 inch. Im not sure i would try carrying the tapemeasure yagi in a checked bag on a commercial flight, but the flexible elements would remove one big reason why it isnt advisable to carry the arrow yagis or elk log periodics aboard aircraft an element, especially a broken element, could be. The antenna is useful especially if you want a portable antenna for back packing etc. Yagi troubleshooting guide 5 of 6 two or more elements are swapped. The yagiuda antenna was named an ieee milestone in 1995. Using the wb2hol plans construction of the antenna is fairly simple and easy. Wc7i provides a calculator for a 3 element yagi design. This helps in transfer of energy from transmitter module to antenna. Lets suppose we calculated our antenna above and got a reflector element length of 9 4 38 per side.

On the two driven element pieces, sand or grind away the paint from one corner. If you decide you really need a yagi with more elements, here are the lengths of them. Use the combination square to measure and mark on the top edge nonfactory edge 14 inch in from the wide end. Yagi in the 1920s did not receive full acclaim in the united states until 1928.

So i used rg58 with lugs and connected with selftaping screws as suggested in the link provided by k7xrl. Are you looking for a project to encourage a new generation of ham radio operators. At the may 6, 2011 clovis amateur radio pioneers monthly membership meeting, rob ae6ge demonstrated how easy it was to construct a 2meter 3element yagi antenna from a tape measure. Driven element is excited directly via feedline, all other elements excited parasitically. Experience has shown me that one can select almost any spacing, within limits, and by simply then adjusting element length, you get pretty much the same performance. If you do decide to use the pipe, make sure that the tape measure will fit inside it and move freely. Jeffrey bail nt1k a simple yet effective 3el vhf yagi directional antenna that could. Figure 4 shows the way to measure the wire the best. Gain is up slightly, but the front to back ratio could be greatly improved. Tape elements cut the 4 lengths of tape measure steel carefully to length, using a sharp pair of scissors dont tell the xyl. You obviously do not need a 50 foot tape measure to measure the wire like shown. Camden county amateur radio society georgia ccars inc. With some adjustment of the boom length, element spacing and element length this antenna is transformed into a very potent performer, due to its new.

Element lengthsdiameters and element spacing determine antenna behavior. This link is listed in our web site directory since sunday jan 26 2014, and till today tape measure yagi antenna has been followed for a total of 625 times. Dual band tape measure yagi antenna by km4lgm while i wait for my arrow antenna to arrive, i thought i would experiment and build a dual band tape measure yagi since i already had most of the parts on hand. Hurst amateur radio club uhf tape measure yagi foxhunt antenna 1 2 1 1 4 1 8 hairpin match 12 or 14 awg solid copper wire form to shape sand away paint solder coax and hairpin match to driven element on tape ends to bare metal view a 11 16 spacing 5 turns rg58 coax and wrap with tape center freq. Simply download the yagi cad program and put the tape.

Steppir 4 element yagi installation instructions manual pdf. Then i used mmana 4 to remodel the dk7zb yagi for the elements made of my steel tape measure. Hurst amateur radio club uhf tape measure yagi foxhunt. Dec 30, 2011 an easytobuild tape measure yagi for direction finding. Now, use the tape measure to mark the remaining element positions. Be careful not to cut yourself on the sharp corners or ends. Tv antennas are still a major application of the yagi antenna. This is easy to do if you dont mark the 4 conductor cables before you tape them along the boom. This antenna is designed for twometer operations, which, for a newbie ham operator, is one of the. Tape measure yagis camden county amateur radio society. For more information on tape measure yagis, check out the following links.

Part length reflective element 48 driven element 2 pieces 1734 each director element 3518. This will be the director of the antenna and will attach to the front of the antenna. Chamfer off the corners at the cut ends for safety. To scale this antenna for any other vhfuhf frequency, read the arrl article. Now, use the tape measure to mark the remaining element positions along the top edge. Jan 02, 2018 a simple tape measure yagi for 2 metres 144 mhz.

Yagi troubleshooting guide 3 of 6 the control cable uses 4 wires per motor one motor in each element housing. This is where you input the center frequency in megahertz. It contains formulas you can use to calculate element lengths and spacing, as well as boom length. I used 18 gauge solid copper wire, but im told anything works. I just finished my own build earlier today, mostly following the techniques used here. Dual band tape measure yagi antenna by km4lgm while i wait for my arrow antenna to arrive, i thought i would experiment and build a dual band tape measure yagi since i. Apply short pieces of black tape on each long section, and on only one end of the two shorter pieces. Testing a tape measure yagi antenna for 2 metres youtube.