SteppIR 3 Element Yagi Instruction Manual
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SteppIR 3 Element Yagi Instruction Manual

Steppir antennas - 3 element
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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

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Summary of Contents for SteppIR 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: Table Of Contents

    SteppIR Antennas - 3 Element Topic Page 3 El Yagi component check Assembly kit materials lists SteppIR acronyms SteppIR “Why Compromise” SteppIR design Assembling the boom Element spacing and position drawing EHU wiring Wiring the DB25 dSub splice 11-12 Connect the boom to the mast plate...

  • Page 3: El Yagi Component Check

    SteppIR Antennas - 3 Element...

  • Page 4: Assembly Kit Materials Lists

    20-6020-01 1-POSITION TERMINAL STRIP 10-1029-01 PACKAGE CONNECTOR PROTECTOR EHU Lid Hardware Kit 72-0054-01 Note: There are three sets of this kit for the 3 Element Yagi PART NUMBER DESCRIPTION 60-0019 10-32 Nylock Nut 60-0017-10 10-32 X 7/8 Flat Phillips Screw 60-0061 10-32 X 7/8 Pan.

  • Page 5: Steppir Acronyms

    SteppIR Antennas - 3 Element Abbreviations Element Support Tube Element Housing Unit Quick Disconnect Boot (rubber)

  • Page 6: Steppir "Why Compromise

    SteppIR to be a commercially feasible product. The current and future SteppIR products should produce the most potent single tower antenna systems ever seen in Amateur Radio! We thank you for using our SteppIR antenna for your ham radio endeavors.

  • Page 7: Steppir Design

    Optimal perform- ance is then possible on all frequencies with a lightweight, compact antenna. Also, since the SteppIR can control the element lengths, a long boom is not needed to achieve near optimum gain and front to back ratios on 20 - 10 meters.

  • Page 8: Assembling The Boom

    It is much easier to put the antenna together right than figure it out what you did wrong after it is up in the air. The 3 element SteppIR Yagi boom consists of four sections of aluminum tubing that are 4 feet long x 1-3/4”...

  • Page 9: Element Spacing And Position Drawing

    SteppIR Antennas - 3 Element Director Driven Return Reflector Figure 5 The four sections of a 3 element yagi shown in the staggered order of installation 3 Element Yagi Spacing DRAWING 2A and Installation Layout (not to scale) Boom / Mast Plate Optional 6m Passive 112 in.

  • Page 10: Ehu Wiring

    SteppIR Antennas - 3 Element...

  • Page 11: Wiring The Db25 Dsub Splice

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

  • Page 13: Connect The Boom To The Mast Plate

    Figure 7 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” direction of the antenna! When you are installing the Yagi, you will want to position the antenna so that the “normal”...

  • Page 14: Secure The Lids To The Ehu Housings

    SteppIR Antennas - 3 Element...

  • Page 15: Attaching Element Housing To The Mounting Plate

    SteppIR Antennas - 3 Element Attach the antenna housing to the element-to-boom bracket Place the flat side of the element housing unit (EHU) on top of the element boom brackets (Figure 9). Note: If the mounting holes for the element housing do not line up with the holes in the element bracket it may be necessary to loosen the two horizontal bolts that hold the element bracket to the boom .

  • Page 16: Connecting Control Wiring

    SteppIR Antennas - 3 Element Connect the wiring and secure to boom WARNING: Make sure the 25-pin sub-D connector is not connected to the controller if the 24 VDC supply is energized and plugged into the controller. There are voltages present on the control cable wires even when the power button on the controller has been pushed to “off”.
  • Page 17 SteppIR Antennas - 3 Element 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’ wires...

  • Page 18: Optional Connector Junction Box Wiring Schematic

    SteppIR Antennas - 3 Element 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 SteppIR Antennas - 3 Element Attach the wiring enclosure and control cable to the boom or mast Position the plastic enclosure in a convenient position on the boom or mast making sure that the cut out in the cap is facing downward (Figure 18). We do not seal the enclosure so that in the event there is water accumulation inside the enclosure from condensation, it will be able to escape.

  • Page 20: Preparing Telescoping Fiberglass Poles

    SteppIR Antennas - 3 Element Prepare the Fiberglass Element Support Tubes (standard poles) Note: If you have ordered the optional 40m - 30m Dipole Kit you need to refer to the section on preparing the poles (ESTs) in that specific manual. The 4 special poles for this option have some differences from the standard poles.

  • Page 21: Polyolefin Heat Shrink Installation

    SteppIR Antennas - 3 Element Heat shrink tube instruction sheet On all elements we now include double wall polyolefin heat shrink, part number #03630. Each tele- scoping pole uses 3 pieces of the 1.5” x 3” long heat shrink, which forms an adhesive bond that is heat activated.

  • Page 22: Foam Plug Assembly For Telescoping Pole Tips

    SteppIR Antennas - 3 Element 70-1007-01 FOAM PLUG ASSEMBLY Each 20m-6m element tip requires a breathable foam plug to be inserted onto the tip end of it so that the element is allowed to vent, but not let any non-liquid enter into the antenna. The foam plug assembly is NOT required for 40/30 elements.

  • Page 23: Connect The Telescoping Poles To The Ehu

    SteppIR Antennas - 3 Element Attach the Fiberglass Element Support Tubes to the Element Housing Units The butt ends of the green fiberglass poles may very slightly in outside diameter. Some of them may have been sanded, while others were not. The colors at the ends will be either natural, or black. The difference in colors has no affect on performance.

  • Page 24: Optional 6M Passive Element Kit

    SteppIR Antennas - 3 Element Optional 6 Meter Passive Element The 6 meter passive element comes in 3 pieces. The main body with a 1/2” x 58” element section at- tached to it, and two 3/8” element sections (Figure 27). The overall length of the element is approxi- mately 112”...

  • Page 25: Steppir Performance

    It is this ability to move the performance peak that makes the SteppIR actually outperform a mono-bander over an entire band – even when the boom length isn’t what is classically considered "ideal". Bear in mind that a Yagi rarely has maximum gain and maximum front to back at the same time, so it is always a compromise between gain and front to back.
  • Page 26 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.
  • Page 27 Yagi Gain / Front to Back Modeling SteppIR antenna designs are all close to 22 ohms at all frequencies, so we needed a broadband match- ing system. We found an excellent one designed by Jerry Sevick, that is described in his book “Building and Using Baluns and Ununs”.
  • Page 28 It is this ability to move the performance peak that makes the SteppIR actually outperform a mono-bander over an entire band – even when the boom length isn’t what is classically considered "ideal". Bear in mind that a Yagi rarely has maximum gain and maximum front to back at the same time, so it is always a compromise between gain and front to back.

  • Page 29: Steppir Optional Equipment

    SteppIR Antennas - 3 Element SteppIR Options 40m - 30m Dipole (loop)  “Y” Cable  Transceiver Interface (Rig Specific)  6m Passive Element Kit ...
  • Page 30 SteppIR Antennas - 3 Element Voltage Suppressor & RF Bypass  Unit ( 16 Conductor) * Connector Junction Box *High Wind Kit (2E and 3E) Element Expansion Kit Dipole 2 Element  2 Element 3 Element 3 Element 4 Element...

  • Page 31: Limited Warranty

    SteppIR will pay for standard shipping back to the buyer. The manufacturer assumes no further liability beyond repair or re-...

  • Page 32: Yagi Specifications

    SteppIR Antennas - 3 Element...
  • 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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