SteppIR 3 Element Yagi Instruction Manual Download

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3 Element Yagi Instruction Manual

Revision 3.0 Sept 2012

2112 116TH AVE NE SUITE 1-5, BELLEVUE WA, 98004 WWW.STEPPIR.COM TEL: (425)-453-1910 FAX: (425)-462-4415

Summary of Contents for 3 Element Yagi

Page 1: ...3 Element Yagi Instruction Manual Revision 3 0 Sept 2012 2112 116TH AVE NE SUITE 1 5 BELLEVUE WA 98004 WWW STEPPIR COM TEL 425 453 1910 FAX 425 462 4415 ...

Page 2: ...ng the direction of the antenna 13 Secure the lids to the EHU housings 14 Attaching Element Housing to the mounting plate 15 Connecting control wiring 16 19 Optional Connector Junction Box wiring schematic 18 Preparing telescoping fiberglass poles 20 Polyolefin heat shrink installation 21 Foam plug assembly for telescoping pole tips 22 Connect the telescoping poles to the EHU 23 Optional 6m passiv...

Page 3: ...SteppIR Antennas 3 Element 3 ...

Page 4: ...02 QTY PART NUMBER DESCRIPTION 2 60 0003 1 3 4 U BOLT SADDLE 2 60 0004 21 2 LONG U BOLT SADDLE 3 60 0062 2 3 4 x 1 4 BOLT 3 60 0030 1 4 NYLOK NUT 8 60 0046 5 16 NYLOK NUT 15 60 0041 1 4 WASHER 3E Element Fastener Pack 72 0005 01 QTY PART NUMBER DESCRIPTION 11 60 0019 10 32 Nylock Nut 2 60 0017 10 10 32 X 7 8 Flat Phillips Screw 9 60 0061 10 32 X 7 8 Pan Phillips Screw 11 60 0018 10 32 Flat Washer ...

Page 5: ...SteppIR Antennas 3 Element 5 Abbreviations EST Element Support Tube EHU Element Housing Unit QD Quick Disconnect Boot rubber QD EHU EST ...

Page 6: ...he air would solve the fre quency problem and in addition would have vastly improved performance over existing fixed length yagis The ability to tune the antenna to a specific frequency without regard for band width results in excellent gain and front to back at every frequency The SteppIR design was made possible by the convergence of determination and high tech materials The availability of new ...

Page 7: ...o index very accurately thus giving very precise control of each element length In addition the motors are brushless and provide extremely long service life The copper beryllium tape is driven out into a hollow fiberglass elements support tube see below forming an element of any desired length up to the limit of each specific antenna model a vertical uses only one side The fiberglass elements supp...

Page 8: ...les are quite snug to align almost perfectly In some cases you may find it necessary to assist the bolts with a tap of a hammer or thread them in by turning with a wrench If the holes are visibly out of alignment when you are assem bling the boom you probably have the boom pieces put together in the wrong order or the section of booms without an element to boom bracket may need to be rotated 180 d...

Page 9: ... element 3 Element Yagi Spacing and Installation Layout not to scale Boom Mast Plate Mast 40m 30m Return Mounting Bracket DRAWING 2A Note Element spacing is measured from element center line to element center line in all cases not from the brackets or element housing units The four sections of a 3 element yagi shown in the staggered order of installation Figure 5 Director Driven Reflector Return ...

Page 10: ...SteppIR Antennas 3 Element 10 ...

Page 11: ...SteppIR Antennas 3 Element 11 ...

Page 12: ...SteppIR Antennas 3 Element 12 CONNECTING THE CONTROL CABLE TO THE D25 SPLICE ...

Page 13: ...u will not be able to secure the boom snugly to the boom clamps To ensure a balanced weight load the center of the mast plate should be reasonably close to the center balance point of the boom Determining the direction of the antenna The SteppIR Yagi has three directions in which it can be used Normal 180 degree and bi directional This can make it complicated to describe the actual aiming directio...

Page 14: ...SteppIR Antennas 3 Element 14 ...

Page 15: ...glass element is fur thest away from the driven element Figure 10 The driven element should be positioned so that the element is closest to the mast plate Figure 11 Fasten each element housing to the element bracket using eight 10 32 x 7 8 screws flat washers Nylok nuts The flat washer needs to be placed be tween the screw head and the plastic element housing Tighten securely but not too tight if ...

Page 16: ...appropriate precautions the controller can be damaged by lightning it is be yond the scope of this manual to cover all of the complexities of lightning protection see some of the ARRL publications that address this The surest protection is to disconnect the 25 pin sub D connec tor and power supply then move them well away from the controller There will be a 12 position terminal strip included with...

Page 17: ...t the other Slide the cables and terminal strips into the provided plastic enclosure Figure 16 position the cutout in the threaded cap over the cables and screw the enclosure onto the cap Figure 14 SteppIR Antennas 3 Element 17 Warning Look carefully at the order of the elements on the terminal block They are not intui tively laid out as they appear on the boom we did it to make the 2 Element wire...

Page 18: ...SteppIR Antennas 3 Element 18 OPTIONAL CONNECTOR JUNCTION BOX WIRING LAYOUT This drawing is here for your convenience refer to the actual accessory Connector Junction Box instructions for more detail ...

Page 19: ...ting through the sheath and shorting the wires SteppIR Antennas 3 Element 19 Warning We strongly recommend that you perform the Test Motor procedure at this point to verify the wiring is correct and the elements are in the right location If you are not going to connect the control cable and test it on the ground make sure you have the element control cables positively identified and well marked If...

Page 20: ...EHUs Repeat the following procedure for each telescoping pole Telescope a pole to full length by pulling each section out firmly in a twisting motion until it is ex tended as far as possible Each segment is tapered and should lock securely in place when fully extended Pole lengths may vary but when fully extended each pole must be at least 17 feet 8 inches in length as measured from the butt end o...

Page 21: ...ioning the heat shrink place it so that the joint of the telescoping pole is centered in the middle of the heat shrink The pictures below exhibit how this is done Apply heat around the entire area of heat shrink Note There are 4 blue colored lines imprinted on the tubing The joint is considered done being heated and waterproof when the lines change color to a yellowish green Each line needs to cha...

Page 22: ...m plug and a flexible plastic housing for it as shown in Figure 1 The foam plug is sent to you already inside the black flexible housing 1 Insert the gray foam plug into the black flexible plastic housing Push the foam plug into the plastic housing until it bottoms out as shown in Figure 2 2 Push the black flexible plastic housing onto the tip of the pole Ap proximately 1 25 of the housing should ...

Page 23: ...end of the EST firmly bottoms out inside the EHT Make sure the EST is seated all the way into the EHT Then push the rubber boot firmly onto the EHT until the hose clamp is past the aluminum ring and will clamp down onto the fiberglass EST The correct mounting position of the rubber boot is shown in Figure 26 Note that current production antennas now have a narrower aluminum ring 4 It is imperative...

Page 24: ...ector solution when connecting the two sections of tubing Fasten securely The six meter aluminum element mounts between the driven element and the director the elements that are approxi mately 89 apart The center of the 6m element should be 31 from the center of the driven element see Drawing 2A Fasten securely to the boom using the 304 SS U bolt saddle and hardware Make certain that you have the ...

Page 25: ...in the boom of a three element beam should be right around 4 wavelengths long This would allow a free space gain of 9 7 dBi however the front to back ratio is compromised to around 11 dB If the boom is made shorter say 25 wavelengths the front to back can be as high as 25 dB but now the maximum gain is about 8 0 dBi Shorter booms also limit the bandwidth which is why right around 3 wavelengths is ...

Page 26: ...T ELEVATED WATTAGES MAY CAUSE DAMAGE TO THE DRIVEN ELEMENT Balun Matching System The SteppIR has a matching system that is included in the 2 element 3 element 4 element and MonstIR Yagi a balun is available as an option on the dipole Our antenna designs are all close to 22 ohms at all frequencies so we needed a broadband matching system that would transform 22 ohm to 50 ohm We found an excellent o...

Page 27: ... degraded performance due to element interaction There are many antennas out in the world that are not getting the maximum theoretical gain from their boom Because we have tunable elements and a very efficient antenna we are getting close to the maximum gain from our boom Traps linear load ing and interlaced elements all contribute to this degradation Stacking Two Antennas Since SteppIR antennas a...

Page 28: ...time so it is always a compromise between gain and front to back With an adjustable antenna you can choose which parameter is important to you in a given situation For example you might want to have a pile up buster saved in memory that gets you that extra 5 1 0 dB of gain at the expense of front to back and SWR when you are going after that rare DX RF Power Transmission with the SteppIR Yagi The ...

Page 29: ...SteppIR Options 40m 30m Dipole loop Y Cable Transceiver Interface Rig Specific 6m Passive Element Kit SteppIR Antennas 3 Element 29 ...

Page 30: ...age Suppressor RF Bypass Unit 16 Conductor Connector Junction Box High Wind Kit 2E and 3E Element Expansion Kit Dipole to 2 Element 2 Element to 3 Element 3 Element to 4 Element SteppIR Antennas 3 Element 30 ...

Page 31: ...SteppIR Antenna s responsibility is strictly limited to repair or replace ment of defective components at SteppIR Antennas discretion Step pIR Antennas will not be held responsible for any installation or re moval costs costs of any ancillary equipment damage or any other costs incurred as a result of the failure of our products In the event of a product failure a return authorization is required ...

Page 32: ...SteppIR Antennas 3 Element 3 ...

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Page 34: ...2112 116TH AVE NE SUITE 1 5 BELLEVUE WA 98004 WWW STEPPIR COM TEL 425 453 1910 FAX 425 462 4415 ...

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