Cushcraft 402cd 40m 2ele monoband trap yagi 21 boom very popular antenna works fairly well, even at 45 above ground. Strengthening the cushcraft 402cd by dave leeson, w6qhs published in qst, november 1991. If you don have room for 80 meters, or just like to build antennas, try the octl. Joe w1jr reports on successfully converting the 402cd to 30meters.
The tower supports a stack of twophased delta loops. W1ny runs towers, 2 with tribanders for 101520 and 2 with 40 2cd beams for 40. Square knot and bowline and many more interesting ideas. It was mostly very good on the real long haul dx such as long path and grayline but couldnt beat a 90100 high cushcraft 402cd into eu and other higher angle areas. Having a time trying to bracket the elements to boom qrz forums. Mfj enterprises inc,ameritron,hygain,hygain,cushcraft,vectronics,mirage,mfj,mfj enterprises,antenna,radio,ham radio,amateur radio,tuner,analyzer,starkville,amplifier. Cushcraft 203cd skywalker assembly and installation manual. Cushcraft 40 2cd 40 meter skywalker yagi july 1983 933 kb cushcraft 6176b boomer 6meter yagi september 1982 771 kb cushcraft a3 triband antenna may 1981 895 kb. More than two elements on any 40m antenna pushes the envelope on towers and rotators. Afternoon also is when the 402cd is raised, as it can wait for the heavier antennamast work to be done. Stew k3nd reports very good results from reinforcing a cushcraft 402cd according to the w6nl modifications.
In the netherlands the x510x therefore is called a calm weather antenna. After the boom broke on the reinforced 40 2cd at 116 ft, an intermittent problem developed in the overhauled lower 40 2cd that i replaced it with. Use a flat plate with 2 u bolts in each direction for the boom, and 2 in the other direction for the element. And this year, thanks again to the webster fire dept, we had a line in the top pulley of the flagpole to pull it all the way up. Way out in back of his house is a 310foot rohn 55g tower. I had one of these shorty forty beams for many years. Go to page 6, which shows the boom to element assembly. To construct the antenna, build the boom and the elements including the. The cushcraft 402cd assembly manual recommends 12 turns. To isolate where the problem was, i hauled a long pole to the top of the tower, hooked up my mfj259b.
Proven products, proven performancefrom cushcraft and dx engineering. This months meeting assisted in several public service. I think if one does as klm suggests in the manual and makes sure the spacers are. Last year at xa5t, we used the aea model in getting a number of antennas up on the same tower. November 4, 2014 narc general meeting special guest. Cushcraft hf beam antennas ten3 free shipping on most. The two elements are about 40 feet long on a 20foot boom.
Cushcraft 40 2cd 40m 2ele monoband trap yagi 21 boom very popular antenna works fairly well, even at 45 above ground. June meeting presentation rdxarochester dx association. Hf antenna wind load reference chart dx engineering. Towertalk w6nl 40 2cd moxon conversion, david gilbert. To attain the proper element lengths, slide the 58 element ends in or out of the fixed length 34 tubing. On sunday morning during field day this year i was on 20m. The a505 antenna elements are tapered, with a 34 tubing in the center and 58 element tips. It was mostly very good on the real long haul dx such as long path and grayline but couldnt beat a 90100 high cushcraft 40 2cd into eu and other higher angle areas. The rebuilt antenna was put back up by k8mr and w8yq with k8zh, w8wwv, and n8dmm assisting. K1kp scratch built w6nl 40m moxon 07142011 revised 05022012.
Cushcraft xm240 monoband 40 meter yagi antennas utilize rugged big thunder hardware combined with highstrength aluminum tubing. Dont kno w if it really was, but we did move the 402cd to another tower under a t h6, where all worked well. Usually the biggest issue is the occasional clicking well get on the. If the moxon worked out really well, i could sell the 402cd. The masts are alternated 40cw, tribander cw, 40ssb, tribander ssb. Cushcraft hf beam antennas xm240 free shipping on most. The cushcraft 402cd and xm240 shorty forty preventative. After consideration of my specific project plans, it was decided to build the antenna completely from scratch. They represent a long history of innovation and manufacturing quality that radio professionals and amateurs have counted on for decades.
Dave leeson wrote one of the most widely read articles in qst on how to strengthen this very popular antenna. Thanks to all who helped me get a copy of the 40 2cd manual. Having a time trying to bracket the elements to boom qrz. Feature radiosport radiosport radiosport radiosport. Dont kno w if it really was, but we did move the 40 2cd to another tower under a t h6, where all worked well. After the boom broke on the reinforced 402cd at 116 ft, an intermittent problem developed in the overhauled lower 402cd that i replaced it with. Pete, n8tr, had his 40m 402cd and kt34xa antenna taken down by k8yse, k8mr, with k8zh and n8dmm on the ground, and helped by w3yq and w8wwv. Initially the plan was to modify a 40 2cd 2 element 40m beam into the w6nl moxon configuration which offers better efficiency, gain and bandwidth than the original design. View and download cushcraft 203cd skywalker assembly and installation manual online. Here you can see and study our complete statistics from our contest logs. I suggest trying a knockoff of the venerable cushcraftmfj 402cd antenna. So the transmitting and receiving signal strength is subject to instantaneous differences. The searchable catalog on our website is the official catalogue. November 4, 2014 narc general meeting special guest speaker.
Simplified strengthening of the cushcraft 402cd n4kg 94 marapr 14 single support gain antennas for 80 and 160 meters n6lf 03 marapr 12 single tower antenna farms w9xt 97. Cushcraft vhf twist antenna a14420t 10 vertical and 10. Th6 and 40 2cd are yet to be overhauled and returned to the tower. These dvds consist of amazing articles, advertisements, illustrations and photographs. Each element has capacitive spreaders in an x configuration on each element end.
September meeting presentation rdxarochester dx association. Both of the boxes needed their hardwired bulbs replaced i prefer the soft glow of an incandescent bulb over the available led mods and i needed to add the rotor maps that i had purchased from. A separate 20 meter dipole at 20 feet above a metal barn roof rounds out the antenna farm. The centerpiece of matts antenna farm is his 80m arrays. Each antenna style is made with highquality components and hardware and is designed to deliver maximum power and efficiency. Aug 31, 2016 which is the old cushcraft 40 2cd manual. To construct the antenna, build the boom and the elements including the sections eh through ed driven element and ea through ed reflector, as shown in the cushcraft xm240 manual. I was more than just slightly concerned for all the antennas in yccc territory irene could. Initially the plan was to modify a 402cd 2 element 40m beam into the w6nl moxon.
I had a 402cd up in the late 80s and this antenna has been beefed up on the. Dx performance was superb on 8075 and on 40 the patterns were a pair of switchable figure 8s and performance varied depending upon the propagation gods. Strengthening the cushcraft 40 2cd by dave leeson, w6qhs published in qst, november 1991. Towertalk w6nl 402cd moxon conversion, samir popaja, 7s7v sm7vzx re. Towertalk w6nl 40 2cd moxon conversion, samir popaja, 7s7v sm7vzx re. New antenna on 40m found modification by w6nl to 402cdxm240 design.
Sep 16, 2016 the other is a g450a, which was originally purchased for the hexbeam, but now turns the 40 2cd that goes up on an ab577 tower during contest season. It may not reflect the actual current prices or offerings that we have for sale. True lengths have been rounded to the nearest 116 extending the boom the original boom length is 12 feet. It has some features which the mfj doesnt, and to ld us our 160 wire was being detuned by the cushcraft 402cd. The tops of the upper pair are at 300 feet with the lower pair at 150 feet. W8wwv used a model helicopter to take videos of the work. Finally, these 512 rare 73 magazine issues can be yours.
Th6 and 402cd are yet to be overhauled and returned to the tower. Adding an inverted l for 160 space and radials an issue. Afternoon also is when the 40 2cd is raised, as it can wait for the heavier antenna mast work to be done. There are two good resources for information on how to significantly improve the antennas survivability. Bilal isotron 40 compactportable antenna march 1998 681 kb bird 4381 power analyst. Basically, the top hat rods 36 elements after the inductor are removed. It is now on the ground for refurbishing after 29 years of service on his 80 foot tower. The 5 for 5 2 meter antenna plant n7cga, cq 1982, dec pg 34 antennas, the aerial here ispart ii, botts k4ejq, cq 1999, may pg.
This antenna has survived ice, heavy wet snow, and high winds. Mfj enterprises inc,ameritron,hygain,hygain,cushcraft,vectronics,mirage,mfj,mfj enterprises, antenna,radio,ham radio,amateur radio,tuner,analyzer,starkville,amplifier. This catalogue is produced for the convenience of our customers who may not have internet access on a regular basis or who wish to have a printed listing of our manuals. Simplified strengthening of the cushcraft 40 2cd n4kg 94 marapr 14 single support gain antennas for 80 and 160 meters n6lf 03 marapr 12 single tower antenna farms w9xt 97 janfeb 11. Jims working on beams for 6 and 2 meters and should have them up soon. I had long admired jerry kessler, n4jls, 40 meter two element cushcraft 402cd. Pete, n8tr, had his 40m 40 2cd and kt34xa antenna taken down by k8yse, k8mr, with k8zh and n8dmm on the ground, and helped by w3yq and w8wwv. Well get a little interstation interference, but its not awful. Ab 577 tower manual 17mb pdf hcra will be using up to 4 towers. A roller indictor tuner makes sure that we have a good match at the rig. Owners of cushcraft 402cd 2element, 40 meter beams particularly the older ones should consider strengthening the antenna to withstand wind and ice. The w6nl moxon yagi is a high efficiency twoelement 40m yagi that uses cross elements.
Towertalk w6nl 402cd moxon conversion, joe subich, w4tv. There are cushcraft hf beams installed around the world, providing dependable service and topnotch performance. Vertical dipole for 75 one of the spring storms took it down. The other is a g450a, which was originally purchased for the hexbeam, but now turns the 402cd that goes up on an ab577 tower during contest season. The cushcraft line includes a wide range of hfvhfuhf vertical, yagi, and rotatable dipole antennas. The club had a couple at one time that were used every field day. It was yellow wire, so it stood out nicely, and looked awesome at 70 feet. The boom could be lengthened with little performance increase but i just used a simple 12foot boom. Swr on 40meters highvariable with antenna positions. I am using a modified 30 meter beam with parts from a 402cd. Initially the plan was to modify a 402cd 2 element 40m beam into the w6nl moxon configuration which offers better efficiency, gain and bandwidth than the original design. In the netherlands the x510x therefore is called a.
The antenna can bend in high winds and that disturbs the vertical polarization. Cushcraft 402cd 40meter skywalker yagi july 1983 933 kb. Adding 30 or 40 meters to your a3s is easy with the a743 addon kit. National contest journal cumulative index, 1973 2007. Ever since, weve said but seldom acted on the concept that the 40 cw station should more actively be a 4015 cw station. Expect the best in hf operations with cushcraft hf beam. Nov 15, 20 enter the password to open this pdf file. They are easy to put up and the zepp has some gain on 40.
Membership director layne ae1n reported that we have a total of 41 mem. Thanks to all who helped me get a copy of the 402cd manual. The newer model cc xm240 can be strengthened in the same way. The article consisted of seven pages, followed by a two page followup a year later. Short vhf uhf beams should be mounted at least 5 feet from your 40 meter beam. It has some features which the mfj doesnt, and to ld us our 160 wire was being detuned by the cushcraft 40 2cd. Towertalk w6nl 40 2cd moxon conversion, joe subich, w4tv.