SteppIR 3 Element Yagi Bedienungsanleitung

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

SteppIR Antennas - 3 Element 2

Topic Page

3 El Yagi component check 3

Assembly kit materials lists 4

SteppIR acronyms 5

SteppIR “Why Compromise” 6

SteppIR design 7

Assembling the boom 8

Element spacing and position drawing 9

EHU wiring 10

Wiring the DB25 dSub splice 11-12

Connect the boom to the mast plate 13

Determining 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 passive element kit 24

SteppIR performance 25-28

SteppIR optional equipment 29-30

Limited warranty 31

Yagi specifications 32

SteppIR Antennas - 3 Element 3

SteppIR Antennas - 3 Element 4

Assembly Kit Materials List

QTY PART NUMBER DESCRIPTION

1 70-1102-21 Terminal Housing 1.5”

1 60-6000-35 3” HOSE CLAMP

1 20-6020-12 12-POSITION TERMINAL STRIP

1 20-6020-01 1-POSITION TERMINAL STRIP

1 10-1029-01 PACKAGE CONNECTOR PROTECTOR

3E Connector Pack

72-0016-02

QTY PART NUMBER DESCRIPTION

260-0003 1-3/4” U-BOLT & SADDLE

260-0004-21 2” LONG U-BOLT & SADDLE

360-0062 2-3/4” x 1/4” BOLT

360-0030 1/4” NYLOK NUT

860-0046 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

260-0017-10 10-32 X 7/8 Flat Phillips Screw

960-0061 10-32 X 7/8 Pan. Phillips Screw

11 60-0018 10-32 Flat Washer

EHU Lid Hardware Kit

72-0054-01

Note: There are three sets of this kit for the 3 Element Yagi

SteppIR Antennas - 3 Element 5

Abbreviations

EST Element Support Tube

EHU Element Housing Unit

QD Quick Disconnect Boot (rubber)

EHU

EST

SteppIR - Why Compromise?

The SteppIR antenna was originally conceived to solve the problem of covering the six ham

bands (20m, 17m, 15m, 12m, 10m and 6m) on one tower without the performance sacrifices

caused by interaction between all of the required antennas.

Yagis are available that cover 20 meters through 10 meters by using interlaced elements or

traps or log periodic techniques, but do so at the expense of significant performance reduction

in gain and front to back ratios. With the addition of the WARC bands on 17m and 12m, the use

of interlaced elements and traps has clearly been an exercise in diminishing returns.

Obviously, an antenna that is precisely adjustable in length while in the 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 lightweight glass fiber composites, Teflon blended thermo-

plastics, high conductivity copper-beryllium and extremely reliable stepper motors has allowed

the 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.

Warm Regards,

Mike Mertel

Michael (Mike) Mertel - K7IR

President

SteppIR Antennas - 3 Element 6

SteppIR Antennas - 3 Element 7

SteppIR Design

Currently, most multi-band antennas use traps, log cells or interlaced elements as a means to cover sev-

eral frequency bands. All of these methods have one thing in common–they significantly compromise

performance. The SteppIR™ antenna system is our answer to the problem. Yagi antennas must be

made a specific length to operate optimally on a given frequency.

So, instead of trying to “trick” the antenna into thinking it is a different length, or simply adding more

elements that may destructively interact, why not just change the antenna length? 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.

Each antenna element consists of two spools of flat copper-beryllium tape conductor (.54” Wide

x .008” Thick) mounted in the element housing unit. The copper-beryllium tape is perforated to allow

a stepper motor to drive them simultaneously with sprockets. Stepper motors are well known for their

ability to 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 support tubes (poles) are telescoping, lightweight and very du-

rable. When fully collapsed, each one measures approximately 57” in length. Depending on the

model, there may be additional extensions added to increase the overall element length.

The ability to completely retract the copper-beryllium antenna elements, coupled with the collapsible

fiberglass poles makes the entire system easy to disassemble and transport.

The antenna is connected to a microprocess

or-based controller (via 22 gauge conductor cable)

that offers numerous functions including dedicated buttons for each ham band, continuous

frequency selection from 80m to 6m (depending on the model). There are also 17 ham and 6

non-ham band memories and you can select a 180° direction reversal* or bi-directional*

mode and it will adjust in just about 3 seconds (* yagi only).

Boom

Element Housing Unit

Element Support Tube

Stepper Drive Motor

Copper Beryllium Tape

Copper-Beryllium Tape

3 element Yagi Installation

Note: If you have the 40m - 30m dipole kit some of the standard 3 element assembly parts will also be in

this box.

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” OD x 1/8” wall, along with three aluminum element mounting brackets as shown in Figure

1. The element mounting brackets are pre-installed at the factory. To assemble your antenna, you will

need a 1/2” (13mm) and 7/16” (11mm) wrench and / or socket drive. We double check the fasteners for

proper tightness before shipping but it is always a good idea to check them yourself before installing the

antenna. Put anti-seize grease on all bolts 1/4” or larger, especially on the u-bolts because it greatly in-

creases their gripping power. Anti-seize grease (molybdenum based) is available at most auto part stores.

Assemble the boom & connect to mast plate

The boom is completely assembled and drilled at the factory to assure precision element alignment. You

may notice in some cases that on a given splice (Figure 1.5) the holes on each side of the splice are at 90

degrees with each other. This is as designed and not a mistake. Pre-drilled holes 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 degrees. Each boom piece has a

number permanently written, scribed or stamped on it. Match each number with the exact same number

of a corresponding boom piece. Figure 1.5 shows joint # 1 markings inside the ring (they must line up).

Drawing 2A shows how each boom section is numbered.

Connect the boom by sliding the respective sections together and align the pre-drilled holes (Figure 2 and

3). Refer to Figure 5 and Drawing 2A for correct configuration. It is advisable to spray a small amount of

WD-40 on the male sleeve before sliding the female section onto it. Do not twist the aluminum exces-

sively, as this can cause binding - the WD-40 will help keep the two pieces lubricated. Insert the included

bolts into the pre-drilled holes, and tighten the Nylok nut securely (Figure 4). Be sure to position the bolts

and nuts so that they are in the same direction as the others. Make sure the boom bolts for the center

splice are installed as shown in Figure 8, if you install them the opposite way the bolt will interfere

SteppIR Antennas - 3 Element 8

Figure 2 Figure 4

Figure 3

Figure 1.5

Figure 1

SteppIR Antennas - 3 Element 9

2 2 3 31 1

Splice Splice Splice

Optional 6m Passive

112 in. Long

Director Driven Reflector

89.5 in. 102.5 in.

31 in. From center of driven element

to center of 6m passive 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

SteppIR Antennas - 3 Element 10

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