SteppIR 4 Element Yagi Manuale utente

4 Element Yagi Instruction Manual

REV 3.0 September 2012

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

SteppIR Antennas - 4 Element 2

Topic Page

4E Yagi check list 3

Bill of materials for assembly kits 4-5

SteppIR acronyms 6

SteppIR—Why Compromise? 7

SteppIR Design 8

Assembling the boom 9-11

Connecting the mast plate to the boom 11-12

Wiring the EHU’s 13

Connecting the control cable to the dSub splice 14-15

Attach the lid to the EHU’s 16

Mounting the EHU’s to the boom element brackets 17

Connecting the control cable to the terminal strips 18-20

Preparing the telescoping poles 21

Waterproofing the pole joints using polyolefin heat shrink 22

Attach the foam plugs to the telescoping pole tips 23

Secure the telescoping poles to the EHU’s 24-25

Install the OPTIONAL 6m passive element kit 25-26

Install the boom truss assembly 26-27

SteppIR Performance 28-30

Options for your SteppIR Yagi 31-32

Limited Warranty 33

Specifications 34

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

SteppIR Antennas - 4 Element 3

SteppIR Antennas - 4 Element 4

Assembly Kit Bill of Materials

4E Boom Assembly Hardware Kit

72-0004-01

QTY PART NUMBER DESCRIPTION

4 60-0004-21 2” LONG U-BOLT WITH SADDLE

2 60-0006 2-1/2” U-BOLT WITH SADDLE

2 60-0029 3” x 1/4” BOLT

10 60-0030 1/4” NYLOCK NUT

8 60-0046 5/16” NYLOCK NUT

4 60-0050 3/8” NYLOCK NUT

4 60-0063 3-1/4” x 1/4” BOLT

50 60-0041 1/4” WASHER

4 60-0100 3-1/2” x 1/4” BOLT

QTY PART NUMBER DESCRIPTION

1 60-0004-02 2” LONG U-BOLT WITH SADDLE

2 60-0034 3/8 WASHER

26ft 21-8000 1200i PHILLYSTRAN

2 60-0083 4” SS TURNBUCKLE

3 60-0037 EYEBOLT

1 60-0085 4” THREADED BOLT

1 60-0042 2” FLAT PLATE

4 60-0044 PLASTIC END CAP

16 60-0045 3/16” WIRE CLIP

7 60-0046 5/16” NYLOCK NUT

4 60-0048 3/16” THIMBLE

3 60-0050 3/8” NYLOCK NUT

4E Truss Assembly Hardware Kit

72-0004-02

SteppIR Antennas - 4 Element 4

Assembly Kit Bill of Materials

4E Terminal Strip / EHU Pack

72-0008-01

QTY PART NUMBER DESCRIPTION

109-0001 ELECTRICAL TAPE

160-6000-40 4” HOSE CLAMP

170-1102-21 1-1/2” ELECTRICAL ENCLOSER

210-1029-01 CONNECTOR PROTECTOR (bulb

grease CP-1)

220-6020-8 8 –POSITION CONNECTOR

120-6020-1 1 –POSITION CONNECTOR

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: Four of the below kits are used for the 4E Yagi

SteppIR Antennas - 4 Element 6

Abbreviations

EST Element Support Tube

EHU Element Housing Unit

QD Quick Disconnect Boot (rubber)

EHU

EST

SteppIR Antennas - 4 Element 7

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, 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 - 4 Element 8

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. Resonant 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 48” 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 40m 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

W O R D O F C A U T I O N

Be Careful to avoid making contact with power lines or other potential hazards when construct-

ing, moving and installing the antenna, as you could be seriously injured or even killed if a metal

object comes in contact with high voltage.

ASSEMBLING THE ANTENNA

It is highly recommended that you read these Assembly Instructions in their entirety before assembling

the antenna. Doing so will provide you an overall idea of what needs to be done and helps avoid mak-

ing time-consuming mistakes. At a minimum, read the directions for each step before starting it. There

will be a replacement in antenna parts if there is a 40/30m adder option, refer to that manual for those

changes. Building your SteppIR™ is a straightforward process. It entails:

 Building the boom

 Connecting the boom-to-mast plate to the boom using the EZeye™

 Securing the element housing units to the element-to-boom brackets

 Connecting the required wiring

 Attaching the wiring enclosure and control cable to the boom

 Preparing the fiberglass telescoping pole

 Attaching the fiberglass telescoping pole to the element housing units

 Installing the optional 6M passive elements (if ordered)

 Installing the boom truss support assembly

Build the Boom

The boom (Figure 1.5) 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) 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. 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 shows joint # 1 markings inside the ring (they must

SteppIR Antennas - 4 Element 9

Figure 1

SteppIR Antennas - 4 Element 10

Drawing 1 shows the layout of the boom for assem-

bly. Note that the lengths shown for each boom

piece are overall lengths, the actual finished length of

the boom will be 32 feet. The paired numbers shown

in the drawing are inscribed on each associated boom

section during the manufacturing process. Matching

these numbers will insure correct alignment. Refer

to Table 2 for proper bolt sizes for each respective

connection.

84 114 182

Reflrctor

Driven Director 1 Director 2

2 2 3 3 4 4 5 5 6 61 1

Mast

Foward

NOT TO SCALE

AB C D E F G

84 114 182

Drawing 1

Table 2: - Bolt Sizes Required for Assembling Boom

Joint Bolt Size QTY

1 1/4-20 x 3” w / Nylok nut 1

1* 5/16” x 4” Eyebolt / nut 1

2 1/4-20 x 3-1/4” w /Nylok nut 2

3 1/4-20 x 3-1/2” w / Nylok nut 2

4 1/4-20 x 3-1/2” w / Nylok nut 2

5 1/4-20 x 3-1/4” w / Nylok nut 2

6 1/4-20 x 3” w /Nylok nut 1

6* 5/16” x 4” Eyebolt / nut 1

* The second fastener at this joint is the 5/16” x 4” Eyebolt

used for the truss assembly. (Figure 3 )

Section Dimensions With Bracket

A 1-3/4 x 50-3/8 Yes

B 2 x 72 Yes

C 2.25 x 48 No

D 2.5 x 72 Yes

E 2.25 x 48 No

F 2 x 72 No

G 1-3/4 x 50-3/8 Yes

Figure 1.5

7 Piece Boom

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