SteppIR 2 Element Yagi User manual

1
2 Element Yagi Instruction Manual
13406 SE 32nd St, BELLEVUE WA, 98005 WWW.STEPPIR.COM TEL: [phone]
Manual REV 3.5 January 4 2023
2 Element Yagi with 40/30 Loop
2 Element Yagi

2
*Projected area is the total perpendicular surface area measured in square feet/square meters, that is exposed to
wind. To calculate wind load you always take the largest projected area whether that is from the perspective per-
pendicular to the boom or perpendicular to the elements. In the case of SteppIR Yagi's, the maximum projected
area will always be the sum of the surface area's perpendicular to the Yagi elements. This calculation is a constant
number and will not change regardless of EIA specification changes. Do not mistake this projected area calculation
as anything more than a datapoint to present to your structural engineer, tower manufacturer or rotator manufac-
turer so that they can determine what is necessary for your application.
When sizing an antenna to a tower, many factors need to be taken into consideration including, but not limited to:
projected area of antenna in square feet or square meters, weight of the antenna and other items on tower, turning
radius, element lengths, antenna height, location exposure category, locations three-second gust wind-speed, lo-
cations maximum radial ice loading.
Improper specification of an antenna or rotator to a tower can result in product failure, injury or death. SteppIR is
not an expert on tower or rotator sizing and for this reason will never offer any recommendation – this specification
process is meant for industry professionals such as a structural engineer, tower manufacturer or rotator manufac-
turer. Please do not attempt to self-specify our products – the information provided by SteppIR is to be utilized by
industry professionals only and we will not accept any liability for improperly specified antenna/tower/rotator appli-
cations.
Specification 2 Element Yagi 2 Element Yagi + 40/30 Loop
Boom length 60” (61.5” overall length) 60” (61.5” overall length)
Boom outside diameter 1-3/4” 1-3/4”
Longest element 36 ft 39 ft
Turning radius 18.94 ft 20.4 ft
Weight 30 lb 37 lb
Projected Area* 7.27 sq ft / 0.66 sq m 10 sq ft / 1.01 sq m
Wind rating 100 mph 100 mph
Adjustable elements 2 2
Power rating 3 kW continuous 3 kW continuous
Feed points 1 1
Frequency coverage 13.85 MHz - 54 MHz 6.95 MHz - 54 MHz
Tuning rate 1.3 ft/s 1.3 ft/s
Control cable 12 conductor 22awg shielded 12 conductor 22awg shielded
Frequency 2E Gain
dBi
2E Front to rear
dB
40M N/A N/A
30M N/A N/A
20M 6.6 21
17M 6.6 16
15M 6.5 13
12M 6.4 11
10M 6.2 9
6M 5.0 2
6M w/ passive 8.3 20
40/30 loop gain
dBi
1.8
2.1
N/A
N/A
N/A
N/A
N/A
N/A
N/A
40/30 loop front to rear
dB
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
ANTENNA SPECIFICATIONS

3
TABLE OF CONTENTS
SteppIR - Why Compromise? 3
Preamble by Jim Streible 5-6
SteppIR Design 7
Abbreviations 8
Parts Checklist 9-11
Stainless Steel Fastener Information 13
Antenna Direction Configuration 14
Antenna Overview and Diagram 15-16
Section 1: Connecting the Boom to the Mast Plate 17-21
Section 2: Control Cable, Junction Box, and EHU Wiring 22-27
Section 3: EHU/Coil Wiring Tests 28-29
Section 4: Mounting EHUs to the Boom 30-31
Section 5: Preparing Fiberglass Poles 32-36
PTT Lockout Tuning Relay (Included) 46
Voltage/Surge Suppressor (Optional) 47
Section 7: CPVC Guide Tubes and Diverter Cones, Attaching Fiberglass Poles 38-44
6 Meter Passive Element (Included) 45
Section 6: Foam Plug Assemblies 37
Grounding the Controller 48
How to Tune Your Yagi (Mandatory) 49-51
SteppIR Options 52
Product Warranty Claim 53

4
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,
John Mertel
John Mertel - WA7IR
President/CEO
STEPPIR—WHY COMPROMISE?

5
OK - - - NOW WHAT?
(Sage advice from Jim Streible, K4DLI—SteppIR Technical Support Guru)
PREAMBLE
You have ordered you SteppIR Antenna and are
waiting for delivery. What do you do in the meantime?
1. Go to the SteppIR web site at www.steppir.com and download the latest manual for your antenna,
and also the Operators Manual for the controller.
2. Read the manuals from cover-to-cover ---TWICE! Don’t just read them –Study them, so you are fa-
miliar the terminology used about the antennas and have a good idea of how the antenna is assem-
bled and where the various parts go.
3. As you go through the manuals make notes of any instructions you may not clearly understand, then
call or email for clarifications. It is better to have it all sorted out before you start assembly. We don’t
mind answering your questions beforehand.
4. Now, wait for notification your antenna is being shipped.
Your antenna has arrived!
What is the first thing to do?
1. If the antenna is to arrive on Wednesday----DO NOT plan an antenna party for Saturday!
2. Even if you plan to install the antenna weeks later, the first thing to do is to unpack the antenna
and do a complete inspection. Make sure nothing is missing or has been damaged in shipment.
3. Do a complete inventory of every part, nut and bolt. Yes it takes time, but it also allows you to
notify SteppIR if anything is missing and allow time to get it to you before you start assembly of
the antenna. There is nothing more frustrating than realizing that something is missing, just
hours before you want to install the antenna.
4. Go back to the SteppIR website and download the latest manual. SteppIR constantly is improv-
ing and adding to the manual, so even though your paper instruction manual is going to have all
the data you need, it makes sense to check for the latest updates online. This is especially true If
you purchased the antenna and a period of time has passed between arrival and install dates.
5. Take the controller and power supply out of their wrappings and connect them. The controller
does not have to be connected to the antenna in order to familiarize yourself with it. In fact, it is
best to get familiar with the controller when it is not connected to the antenna. Turn on the con-
troller and read through the Operators Manual again while operating the controller in all it
modes. Go through the menus so you know what each does and how to navigate through the
various menus and functions.

6
OK - - - NOW WHAT? (continued)
(Sage advice from Jim Streible, K4DLI—SteppIR Technical Support Guru)
PREAMBLE
Your Antenna Has Arrived!
What is the first thing to do?
(continued)
5. When you have finished working with the controller be sure the display indicates “Elements
Home” and the controller has been turned OFF. When the controller is connected to the anten-
na and the controller is turned back on the next time, it will think the antenna is in whatever po-
sition the controller was left in last time you were using it, so you want to be sure that position is
HOME.
6. Once the antenna is completely assembled and ready to mount on the antenna tower, use an
antenna analyzer, if you have one, to test resonance of the antenna. If you don’t have an ana-
lyzer, try to borrow one. It will save you a lot of time and worry. Check the antenna on each
band for some sign of resonance within the frequency range. Leave the antenna on the default
frequency and tune the analyzer to see where the dip occurs. It will be somewhere below the
lower band edge on each band with the antenna 3 or 4 feet above the ground on sawhorses.
Also, don’t expect to see a 1:1 SWR here, just look for a good indication of resonance.
Once it has been determined this part of the antenna is working correctly do the following: Se-
lect the lowest band and establish the dip condition by tuning the analyzer. Do not touch the
analyzer again. Retract the elements and then reselect the same band. The antenna should
come back the very near the same setting. Do this 2 or 3 times on each band. Also, try going
from the band being tested to any other band and back again and observe that the antenna
comes back to the same resonant point. Now you know the antenna is tuning correctly from
band to band and is consistent.
7. When you are ready to use the antenna, be sure to “enable” the DB18 in the controller menu, or
your antenna will not work properly on 40m and 30m. If you installed the 6m passive element,
be sure to enable that as well. When done enabling, save and then turn the controller off, and
back on again.
8. Enjoy the antenna!
73
Jim Streible—K4DLI

7
Currently, most multi-band antennas use traps, log cells or interlaced elements as a means to
cover several frequency bands. All of these methods have one thing in common–they signifi-
cantly compromise performance. The SteppIR™ antenna system is our answer to the prob-
lem. Resonant antennas must be made a specific length to operate optimally on a given fre-
quency.
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? Opti-
mal performance is then possible on all frequencies with a lightweight, compact antenna. Al-
so, 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 perfo-
rated 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 ser-
vice 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 tele-
scoping, lightweight and very durable. When fully collapsed, each one measures approxi-
mately 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 col-
lapsible fiberglass poles makes the entire system easy to disassemble and transport.
The antenna is connected to a microprocessor-based controller (via 22 gauge conductor ca-
ble) that offers numerous functions including dedicated buttons for each ham band, continu-
ous frequency selection from 40m to 6m (depending on the model).
Boom
Element Housing Unit
Element Support Tube
Stepper Drive Motor
Copper Beryllium Tape
Copper-Beryllium Tape
STEPPIR DESIGN

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ABBREVIATIONS

9
It is important that you do an inventory of the items that were shipped to you. Nothing is
worse than discovering a day before a planned installation that there are missing parts! We do
our very best to ensure that you receive everything needed for construction of your antenna, but
better to be safe than sorry—inventory your parts well in advance of your installation. The items
in blue represent hardware for the 40/30 loop—you will not need to check these off if your an-
tenna does not include the 40/30 loop.
What Comes in the Antenna Box
ü QTY PART # DESCRIPTION
1 09-0001 Electrical tape 3/4” PVC MERCO 307
1 09-1025 Conical Grinding Stone, 3/4”
4 OR 6 10-1013-02 Telescoping Pole, 18 foot 4 section
1 10-1028-21 TM-1 Thread Magic Anti-seize sticks
1 10-1054-02 Truss support, 30m/40m, 36”
8 OR
12 10-1059-01 Polyolefin Heat Shrink 1-1/2” x 6”
4 OR 6 10-1059-21 Polyolefin Heat Shrink 1.1” x 6”
2 10-1501-23 Cover for Black EHU, With countersunk drain hole
2 10-1509-02 Diverter Cone
1 21-6040 Splitter, 6” 3-1/2mm, Stereo Male to Two RCA Female
4 OR 6 60-1006-22 QUICK DISCONNECT, 1-1/2” to 1-1/4”, Fernco, (1056-150-125)
4 OR 2 70-1007-01 Foam plug assembly consisting of plastic cap and foam plug
1 70-1508-02 Boom assembly, 2 Element
2 70-2025-13 CPVC tube, 49” x 3/4”, with coupler
2 70-2025-23 CPVC tube, 39-7/8” x 3/4”, without coupler
1 70-2034 Connector Junction Box, 2E and 3E
1 70-3000-01 33 Volt supply with cord
1 70-3401-01 OR
70-3403-01 EHU, 20m Driven OR 40m Driven
1 70-3420-01 EHU, 20m Passive
1 70-6010-01 Adapter, 25pin Dsub Field Splice
1 72-0009-03 Kit, Glue
1 72-0010-01 or
-02
Kit, UrbanBeam/2E EHU Cable Assemblies and 16” Coax Seal (72-0010-
02 is preassembled, 72-0010-01 is bare cable only)
2 72-0054-01 Kit, EHU Lid Hardware - 1 for Driven and 1 for Passive
1 70-6002-01 2E 6m Passive element
1 - QR Code Sheet - Instruction Manuals
PARTS CHECKLIST

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What Comes in the Sweep Box
ü QTY PART # DESCRIPTION
1 09607 High Wind Mast Kit; 2 or 3 element Yagi
2 10-1153-01 Poly Sweeps (100psi)
4 10-1511-01 Sweep diverter
4 10-1059-21 Polyolefin Heat Shrink 1.1” x 6”
2 10-1503-21 Fiberglass rod, 3/8” x 31-3/4” long, black
1 72-0008-11 Kit, 30/40m Return Hardware
1 72-0014-01 Kit, 2E/3E 6m hardware
1 72-0018-31 Kit, 39’ Element Truss, 2E, 3E, DB18/18E/36/42 end elements
1 72-0027-03 EST Return Tube, 1-3/4” x 12”, Fiberglass, with reinforcing rings
1 72-0030-61 Kit, Sweep hardware
PARTS CHECKLIST
72-0009-03
Kit, Glue
ü QTY PART # DESCRIPTION
1 09-1020-10 Weldon 10259 Multi-Purpose Cement, 6mL
1 09-1013 Glass vial, 6mL
4 09-1011 Cotton tip applicator, 3”
72-0010-01
Kit, 10’ 4 Conductor Cable and Coax Seal
ü QTY PART # DESCRIPTION
10 ft 21-5001-01 Control cable, 4 conductor, 22awg, shielded
12 in 09-1022 Coax seal, 1/2” width
OR, IF YOU HAVE THE PREASSEMBLED CABLE
72-0010-02
Kit, UrbanBeam/2E EHU Cable Assemblies and 16” Coax Seal
ü QTY PART # DESCRIPTION
2 ft 21-5001-01 Control cable, 4 conductor EHU Cable Assembly, 13’
16 in 09-1022 Coax seal, 1/2” width

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09607
High Wind Mast Kit
ü QTY PART # DESCRIPTION
2 10-1021-43 Boom to Mast plate, 8", HIGH WIND with saddle holding holes
4 10-1601-22 Saddle, 2" x 3/4"
4 10-1601-03 Saddle, 1-3/4" x 3/4"
4 60-0065 Bolt, 5/16" x 3-1/2", S/S (1c)
4 60-0066 Bolt, 5/16" x 4", S/S
9 60-0046 Nut, 5/16" -18, Nylock, S/S
1 60-0037-21 Eyebolt, 5/16" x 4", S/S
1 60-0085 Bolt, 3/8" x 4", Hex Head, full thread, S/S
2 60-0050 Nut, 3/8", S/S, Nylock
4 60-0034 Washer, 3/8", Flat, S/S
1 60-0049 Nut, 3/8", S/S
1 60-0051 Lockwasher, 3/8", Split, S/S
3 60-0062 Bolt, 1/4" -20 2-3/4", S/S
3 60-0030 Nut, 1/4"-20, Nylock, S/S
15 60-0041 Washer, 1/4", Flat
4 60-0112 Set Screw, 10-32 x 1/4", Cup Point, S/S
2 60-0017 Screw, 10-32 x 3/4", Panhead, S/S
1 10-1028-01 Anti-seize single packets, TMP-1
1 09-1026 5/16" Drill Bit
PARTS CHECKLIST
72-0008-11
Kit, 30/40m Return Hardware
ü QTY PART # DESCRIPTION
2 60-0003 U-Bolt & Saddle, 1-3/4"
4 60-0046 Nut, 5/16" -18, Nylock, S/S
72-0054-01
Kit, EHU Lid Hardware
ü QTY PART # DESCRIPTION
11 60-0019 Nut, 10-32, Nylock, S/S
2 60-0017-10 Screw, 10-32 x 7/8", Flathead, Phillips
9 60-0061 Screw, 10-32 7/8", Panhead, S/S
11 60-0018 Washer, 10-32, Flat, S/S (5c)

12
72-0018-31
Kit, 39' Element Truss, 2E, 3E, DB18/18E/36/42 end Elements
ü QTY PART # DESCRIPTION
4 10-1510-21 Element Truss Coupler (sets)
75ft 21-7001-01 Dacron double braided poly rope, 1/8"
2 10-1601-03 Saddle, 1-3/4" x 3/4"
2 60-0083 Turnbuckle, 1/4" x 4", Eye to Eye, S/S
1 60-0110 Bolt, 1/4"-20 x 1-1/4", S/S
1 60-0030 Nut, 1/4"-20, Nylock, S/S
2 60-0065 Bolt, 5/16" x 3-1/2", S/S
2 60-0046 Nut, 5/16" -18, Nylock, S/S
2 60-0033 Washer, 5/16", Flat, S/S
16 60-0014 Nut, 6-32 Nylock
16 60-0014-01 Screw, 6-32 X 7/8", Panhead
2 60-0158 Thimble, 1/8", Heavy galvanized
4 60-0157 Wire Clips, 1/8", galvanized
1 10-1028-01 Anti-seize single packets, TMP-1
1 09-0001 Electrical tape 3/4" PVC MERCO 307
1 60-0112 Set Screw, 10-32 x 1/4", Cup Point, S/S
PARTS CHECKLIST
72-0030-61
Kit, Sweep Hardware
ü QTY PART # DESCRIPTION
28 60-0014 Nut, 6-32 Nylock
20 60-0016 Washer, 6-32, Flat
28 60-0186 Screw, 6-32 x 2", 18-8 SS, Button Socket CS
8 10-1155-01 Sweep Clamp, SCH-160 Clamp, half a set (need 2 to make a single set)
1 60-9000 Allen Key, 5/64"
72-0008-11
Kit, 2E/3E 6m Hardware
ü QTY PART # DESCRIPTION
1 60-0003 U-BOLT & SADDLE, 1-3/4”
2 60-0011 Screw, 6-32 x 3/4", Panhead
2 60-0014 Nut, 6-32 Nylock
2 60-0046 Nut, 5/16" -18, Nylock, S/S

13
From time to time, we get complaints from customers regarding galling of stainless steel fasteners.
Here is an excerpt from the Industrial Fastener Institute's Standards Book: Thread galling seems to be
the most prevalent with fasteners made of stainless steel, aluminum, titanium and other alloys which
self-generate an oxide surface film for corrosion protection. During fastener tightening, as pressure
builds between the contacting and sliding thread surfaces, protective oxides are broken, possibly
wiped off and interface metal high points shear or lock together. This cumulative clogging-shearing-
locking action causes increasing adhesion. In the extreme, galling leads to seizing - the actual freez-
ing together of the threads. If tightening is continued, the fastener can be twisted off or its threads
ripped out.
During minor galling, the fastener can still be removed, but in severe cases of galling, a strong bond
between the bolt and nut can prevent removal of fasteners. Unfortunately, little is known on how to
control it, but here are two ways to minimize this effect: Decreasing installation RPM speed will cause
less friction and decrease heat generation. Lubrication used prior to assembly can dramatically re-
duce or eliminate galling. Recommended lubricants should contain higher amounts of molybdenum
disulfide, such as graphite which is very commonly used as a solid lubricant or special anti-galling lub-
ricants sold by chemical companies.
We provide an anti-seize compound stick called “Thread Magic” with all of our antennas and strongly
encourage you to use it to reduce the aggravation of galling. Nylock nuts are no exception—apply the
anti-seize on fasteners that use Nylock nuts as well. The Thread Magic stick is fantastic and is good
for all metal fastener use—and, you can get plenty of anti-seize on the fastener without getting it on
your hands!
Turn-of-nut tightening of nuts to bolts is recommended where torque values are not named, with metal
to metal connections. Turn the wrench/socket until it is flush with the material it will seat against and
snug-tightened, and then turn approximately 2/3 of a rotation past that point. When in doubt use com-
mon sense to ensure the fastener is not too loose, or not too tight—both positions can cause issues.
On all connections, check the tightness 30 minutes or more later to ensure no creeping has taken ef-
fect.
Contrary to popular belief, galling of stainless steel is not a symptom of a "cheap" fastener - it is prev-
alent in all types of stainless steel, aluminum and titanium fasteners. You can be assured that the
stainless steel fasteners we provide with our products are manufactured of very high quality.
Save yourself a lot of grief and always use a thread lubricant when working with stainless steel
fasteners.
STAINLESS STEEL FASTENER INFORMATION

14
20m-6m Reflector
REVERSE DIRECTION
(180 deg) FORWARD DIRECTION (Normal)
20m-6m Director
20m-6m Driven
20m-6m Driven
6m Passive Element
The driven element is a dipole when
on 40 and 30 meters
ANTENNA DIRECTION CONFIGURATION
6m Passive Element
20m-6m Director
20m-6m Reflector
20m-6m Driven / 40m-30m Dipole 20m-6m Driven / 40m-30m Dipole

15
Figure 1.01
2E With 40m-30m Dipole Kit
(not to scale)
2E Without 40m-30m Dipole Kit
(not to scale)
Figure 1.00
Boom / Mast Plate
Mast
6m Passive 114 in. long
Splice
Director Driven
22 in. from center of driven element
to center of 6m passive element
57 in.
Boom / Mast Plate
Mast
6m Passive
114 in. long
Splice
Director
Driven
22 in. from
center of driv-
en element to
center of 6m
passive ele-
ment
57 in.
ANTENNA OVERVIEW AND DIAGRAM

16
The 2 element SteppIR Yagi boom consists of two sections of aluminum tubing that are 60 inch-
es long x 1-3/4” OD x 1/8” wall, along with two aluminum antenna housing brackets as shown in
Figure 1. The element housing brackets are pre-installed at the factory. To assemble your an-
tenna, you will need a 1/2” (13 mm) and 7/16” (11 mm) 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, especially on the
U-bolts because it greatly increases their gripping power. Anti-seize grease (molybdenum
based) is available at most auto part stores and is included in the package.
The boom is completely assembled and drilled at the factory to assure precision element align-
ment. 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.
Connect the boom by sliding the two sections together and align the pre-drilled holes. Refer to
the diagram below 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 excessively,
as this can cause binding - the WD-40 will help keep the two pieces lubricated.
Note: The boom bolts need to have a total of “5” flat washers on each bolt to prevent the nut
from bottoming out at the end of the threads before it is tight.
Insert the included bolts into the pre-drilled holes, and tighten the Nylock nut securely (Figure
1).
Note: If you are not installing the 40m-30m dipole kit you can remove the return bracket if you
want to, but it is not necessary. If you do remove the bracket it is a good idea to mark
both the boom and the bracket so that it can be reinstalled correctly later if needed and to
re-install the bolts into the boom.
Driven
Director
40m– 30m Return Bracket
2 ELEMENT YAGI INSTALLATION AND BOOM ASSEMBLY
ASSEMBLE THE BOOM
KEY QTY Part Number Description
A 1 10-1017-22 Element Bracket, 1-3/4”
B 1 10-1201-01 Aluminum tube, 1.75” OD x 48” Length
C 1 60-0063 Bolt, 1/4”-20 3-1/4”, SS
D 5 60-0041 Washer, 1/4”, flat
E 1 60-0030 Nut, 1/4”-20, Nylock
Figure 1.02
Use anti-seize
on all stainless
hardware!

17
The mast plate is connected to the boom using hardware from the high wind kit (part number
09607). If you haven’t already, make sure to do an inventory of the items shipped to you as
part of the kit. The checklist for the high wind kit can be found on page 9 of this manual.
Install the mast clamps to the back of the mast plate as shown in the diagram. Make sure to
apply anti-seize to the threads of each bolt before tightening to minimize unwanted binding.
Do not tighten the set screws (F) in the
saddle clamps until after the antenna is
mounted to the mast.
CONNECTING THE BOOM TO THE MAST PLATE
QTY Part Number Description
2 10-1021-43 Mast Plate
4 10-1601-22 Saddle Clamp, 2”
4 60-0066 Hex Bolt, 5/16” x 4”
4 60-0046 Nylock Nut, 5/16
2 60-0017 Pan Screw, 10-32 x 3/4”
2 60-0112 Set Screw, 10-32 x 1/4”, Cup Point
KEY
A
B
C
D
E
F
A
A
B
B
C
B
B
C
C
C
D
D
D
D
E
E
F
F
Section 1.1: Install the Mast Clamp (High Wind Kit)
Older antennas attach the mast plate differently. Skip to page 23 if you do NOT have the
high wind kit.
Use anti-seize
on all stainless
hardware!

18
Determining the Direction of the Antenna
The SteppIR Yagi has three “directions” in which it can be used. Normal, 180 degree and bi-
directional. When the antenna is installed on its mast the passive element should be facing
the direction the rotator indicates.
· In the normal mode the antenna directs RF energy towards the passive element (the ele-
ment that does not have the coax attached to it), giving gain in that direction and rejecting
signals coming directly at the driven element from the opposite direction.
· In the 180° mode the gain is now directed from the driven element end and rejected from
the passive end.
· In the Bi-Directional mode, your antenna is directing RF in both directions.
CONNECTING THE BOOM TO THE MAST PLATE
Section 1.2: Install the Fully Threaded Bolt
· Tighten 3/8” nut (C) first.
· When installing the 3/8” Nylock Nut (D), thread it fully with the nylon facing AWAY from the
mast plate first, then take it off and thread it back onto the bolt with the nylon facing TO-
WARD the mast plate.
KEY QTY Part Number Description
A 1 60-0085 Hex Bolt, 3/8” x 4”, Fully Threaded
B 2 60-0051 Lockwasher, 3/8”, Split
C 1 60-0049 Nut, 3/8”
D 2 60-0050 Nylock Nut, 3/8”
A
B
C
D
Use anti-seize
on all stainless
hardware!

19
CONNECTING THE BOOM TO THE MAST PLATE
Section 1.3: Install the High Wind Kit
· Position the high wind kit using the drawing below as reference.
· Mark a hole on the top of the boom directly under the eyebolt stud, 24.40” from the bracket of the Di-
rector EHU.
· Place the boom on a flat level surface with the element mounting brackets facing up and leveled.
· Make sure the mark is on the top center of the boom.
· Center punch the mark.
· Drill straight down through both sides of the boom with the provided 5/16” (.3125”) drill bit.
· Use the exploded view drawing below to install the mast plate. Discard the included washer and non-
Nylock nut on the Eyebolt, it will not be used.
· Adjust the two Nylock nuts on the EZ-Eye stud to make sure the boom is level.
· Tighten the Nylock nuts/ set screws on the boom saddle clamps and Nylock nuts on the EZ-Eye.
KEY QTY Part Number Description
A 4 10-1601-03 Saddle, 1-3/4” x 3/4”
B 4 60-0065 Hex Bolt, 5/16” x 3-1/2”
C 5 60-0046 Nylock Nut, 5/16”
D 2 60-0112 Set Screw, 10-32 x 1/4”
E 1 60-0037-21 Eyebolt, 5/16" x 4"
F 4 60-0034 Washer, 3/8”
G 1 60-0046 Nylock Nut, 3/8”
NOTE: The boom can be re-leveled if necessary by loosening the bolts on the boom saddle
clamps and then adjusting the two Nylock nuts that position the EZ-Eye. Be sure to tighten all
nuts when finished.
B
D
E
A
F
G
C
C
F
Connector Junction Box
Director
Driven
Use anti-seize
on all stainless
hardware!
Although the EHUs are shown in
the diagram, they should not be
mounted to the boom yet—they are
here for reference.
Director

20
CONNECTING THE BOOM TO THE MAST PLATE
Section 1.4: Install the Mast Clamp (No High Wind Kit)
The mast plate has 8 pre-drilled holes. Four are used for the 2” stainless steel mast clamps, and
four more are used for the 1-3/4” stainless steel boom clamps.
Connect the boom to the mounting plate (figure 1.41), using the 1-3/4” U-bolts, saddles, and
nuts. Align the boom so that the element brackets are level (mast plate is perpendicular to ele-
ment brackets), then tighten securely. Ensure the mounting plate is the correct distance from
the director element plate (18.50” from end of bracket) as shown in Figure 1.40.
Connect the mast to the mast plate using the included 2” stainless steel U-bolts, with saddles,
and Nylock nuts as shown in figure 1.41. Tighten securely.
With this mounting style, it doesn’t matter which side of the boom the mast plate goes on—that’s
up to you.
Figure 1.40
Figure 1.41
Driven
Director
Driven
Director
Director
Driven
Use anti-seize
on all stainless
hardware!