Bud Die Pole

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Easy to build Buddipole With the current events of terrorism and tropical weather that plague the US., I’ve decided that being an ARES/RACES member, I should be portable for HF as well as VHF. I purchased the Yaesu FT-857D which pretty much exhausted my Ham Radio funds. So what should I do about a portable antenna? With a lot of research on Ham Sticks, Slinky Di-pole, Verticals, Etc, I decided on the Buddipole. The Buddipole, designed by Budd W3FF is an extremely compact and portable antenna sys
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  Easy to build Buddipole With the current events of terrorism and tropical weather that plague the US., I’vedecided that being an ARES/RACES member, I should be portable for HF as well asVHF. I purchased the Yaesu FT-857D which pretty much exhausted my Ham Radiofunds. So what should I do about a portable antenna? With a lot of research on HamSticks, Slinky Di-pole, Verticals, Etc, I decided on the Buddipole. The Buddipole,designed by Budd W3FF is an extremely compact and portable antenna system.Deployed, it spans 16 feet across and is nice & light. The Buddipole has about a 1.5 DBgain on 40 and 20 meters were ham sticks can’t compete. In fact, it has also won a fewportable hiking ham awards.Budd’s Commercial Buddipole (See:http://www.buddipole.com   ) Starts at about $200which I don’t have. Fortunately Budd provides the instructions to build the Buddipoleyourself (see:http://www.qsl.net/w3ff ). But Budd’s Homebrew design lacks 40 meters,and you have to physically take it apart and change out the coils to change bands. So Itook his homebrew concept and used it to make a Buddipole more like his commercialdesign with tapped coils and it includes 40 meters. To build this version, you will need the following: Order online from Buddipole:Two 66 inch Stainless Steel Telescopic Whips ( these are the best on the market plus forusing his design, its nice to put a little money in Budd’s pocket! ☺ ).Go tohttp://www.buddipole.com/stainsteelte.htmlto purchase.From Home Depot:Two 22 inch lengths of ½ inch PVC pipeOne 6 inch length of 1 ¼ PVC pipeOne 6 ½ inch length of 1 ¼ PVC pipeOne ¾ x ¾ x ½ inch PVC Tee (slip-slip-thread)Two ¾ to ½ inch PVC adaptersTwo 1 ¼ to 1 ¼ PVC UnionsTwo ½ to 1 ¼ inch PVC adaptorsTwo 1 ¼ PVC end capsFrom Radioshack:One spool of 75 foot, #20 insulated speaker wire.(That is more than enough to make several antennas.)RS Part # 278-1388Two packages of electrical connectors. (use the blue ones, and take the wire, strip it, andfold it over before inserting in into the connector. That makes a better connection.)RS Part # 640-3313  Two 3/8 x 24 thread to SO-239 antenna adaptorsRS Part# 21-961One package of 1 3/8 inch Alligator ClipsRS Part# 270-374COne set of Solderless Banana PlugsRS Part# 274-721One 12-Ft. 3/4 Color Electrical Tape (5-Pack, you will only need two of the 5 colors)RS Part# 64-2380 Tools Needed: You will need a hacksaw, a pair of needle-nosed pliers, a soldering iron, solder, a drillwith a 7/16” and a 1/8 bit, (perhaps, also, a 3/16 bit, if you want a little extra roomwhen drilling the holes in the PVC), a crimping tool, two thumb tacks, and a tool forremoving insulation from wire. You will need a measuring tape. Keep a pad and pencilhandy to record measurements. A Marks-alot felt pen will be needed in the final tuningphase. You should buy or borrow an antenna analyzer if you don't own one. Here's how to build the antenna: Take one of the two 22 long pieces of ½” PVC.Drill a 1/8 hole about 3/4 of an inch in from each end of the PVC pieces. Don't drill thewhole way through. Angle the drill slightly toward the long end, so that you can slide awire into the piece of pipe. Drill the holes on the same side of the pipe. Leave the speakerwire in its pair form before you cut it. Cut 28 of wire from the spool, and split it into two28 pieces. Put one end of one of the wires into the hole you just drilled in the PVC.Gently push the wire until you see it come out the other side of the pipe. Take a pair of needle-nosed pliers and work the protruding end into the hole at the end of the PVC. Youwill have about 3 of wire on each side of the pipe when you are finished. Do the samefor the second 22 PVC pipe piece. Crimp one of the end electrical connectors, a femaleconnector, on one side of each piece of the section you just finished.  Put a male electrical connector on the other side on each section. Add a ¾ to ½ inch PVCadapters to each end You are finished with the 'arms' of the dipole.Cut 17’ 10” of wire from the spool, and split it into two 17’10” pieces. Take the 1 ¼”PVC pipe that is 6 ½ inches long . (for this illustration we will mark this with RED tapeas it will be connected to the center conductor of the feed) Drill a 1/8 hole all the waythrough the section, about ¾ of an inch in from one end. Then drill a hole threw only oneside. Take a piece of wire 17’ 10” long and poke about three inches through the holes youdrilled completely threw the pipe. Start wrapping the wire around and around the PVCsection until you have 39 turns on the coil. Push the tag end through the hole you drilledon only one side, and anchor it inside the pipe with plastic tape. This side will face thetelescoping stainless steel antenna rod. Cut the tag end so that you have about 3 of wirecoming out of the hole in the pipe. Put a banana connector on the protruding wire that isinside the pipe. Cut a 6” piece of speaker wire and solder on an alligator clip to one side,strip and twist the other end with the other side of the coil that will face the center tee andcrimp a male electrical connector on the two twisted wires.Repeat the paragraph with the 1 ¼” PVC pipe that is 6 inches long using only 16’ 6” of the wire, and 36 turns (mark this one with BLACK tape).Here is the specifications for the coils:   You will notice that I am using 20 gauge and not 18 (0.040). The gauge did not seem toaffect all too much, however the thick insulation almost gave the perfect winding pitch(gap between the windings).Take both of the 1 ¼ end caps. Drill a 7/16” hole the center on each and install the two3/8 x 24 thread to SO-239 antenna adaptors with the SO-239 on the inside of the cap.Assemble the coils as shown below:Assemble your buddy pole and add your feed line. Remember to coil up about 6 to 12turns of coax at the feed point as a balun. You are ready to start testing and adding theband taps to the coils. With the alligator clips dangling, using an antenna analyzer movethe telescope sections in & out for fine adjustments. Write down the settings. Later whenyou begin broadcasting, you should get great SWR’s without the need for an antennatuner.
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