SteppIR DB11 Yagi User manual

SteppIR Communication Systems | 13406 SE 32nd St. Bellevue, WA 98005 | 425.453.1910 | [email protected]
DB11 Yagi
Assembly Manual
REV 4
01/09/20

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TABLE OF CONTENTS
Component checklist…………………………………………………………………………………………..
3
Antenna kit contents……………………………………………………………………………………………
4
EHU wiring instructions………………………………………………………………………………………..
6
Recommended tools…………………………………………………………………………………………...
8
Starting assembly………………………………………………………………………………………………
8
Boom assembly………………………………………………………………………………………………...
9
Mast plate assembly…………………………………………………………………………………………...
10
Element housing spacing………………………………………………………..........................................
11
Element housing assembly………………………………………………………........................................
12
Wiring the control cable……………………………………………………….............................................
13
Mounting the coax switch………………………………………………………..........................................
14
Wiring the coax cable………………………………………………………................................................
15
Securing the coax and control cable to the boom ………………………………………………………….
16
Wiring the element housings………………………………………………………………………………….
16
DB25 connector wiring diagram………………………………………………………………………………
17
Preliminary wiring and EHU testing…………………………………………………………………………..
18
Preparing the telescoping poles………………………………………………………………………………
21
Mounting the poles to the EHUs……………………………………………………………………………...
23
Limited Warranty……………………………………………………………………………………………….
24

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DB11 Yagi –Component Checklist (72-2011-01)
Use this list to ensure that everything you ordered has been included in the shipment It is a good idea to
mark the options you have purchased, for future reference .
MAIN ANTENNA BOX
SWEEP BOX
0
QTY
PART NUMBER
ITEM
6
10-1153-01
DB11 style sweep
3
10-1151-11
Return bracket 12 inch
1
10-1021-43
8 inch mast plate
1
72-0052-11
DB11 Saddle kit
1
Check length
Control cable, 16 Conductor or 20 Conductor
(40m dipole opt)
OPTION: surge suppressor 06108 = 8pos 06112 = 12pos
06116 = 16pos
1
21-6301-80
Coax jumper cable, 8 ft
2
21-6301-30
Coax jumper cable, 3 ft 6 in
3
70-2030-11
DB-Style Mounting Plate
1
70-3001-01
Coax Switch assembly, box, lid hardware and screws.
70-6010-01
OPTION: DB25 Field Splice
0
QTY
PART NUMBER
ITEM
1
70-3401-01
EHU, 20m Driven
2
70-3407-01
EHU, DB11 20m Driven w/Relay
1
Controller (SDA 100 or SDA 2000)
1
Controller Operator’s manual (SDA 100 or SDA 2000)
1
20-8030-02
33V Power Supply
1
20-8040-01
Power Cord
1
70-2037
Connector Junction Box
1
71-0017
Connector Junction Box Manual
1
71-0018
DB11 assembly manual
1
DB11 Sweep Picture Sheet
1
72-0010-41
DB11 Control Cable Kit
6
60-1006-22
FERNCO rubber boot
1
72-0050-11
DB11 Hardware kit, nuts and bolts
1
72-0051-12
DB11 Small parts kit
1
20-6208-01
25 Pin Male Connector
1
20-6209-01
25 Pin Back Shell
6
10-1013-02
Telescoping Poles (DB11 poles Cut to 97.5 inches by customer)

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DB11 Yagi –Component Checklist (Continued) (72-2011-01)
BOOM BOX
0
QTY
PART NUMBER
ITEM
1
10-1202-01
1-3/4 inch x 72 inch boom section
1
10-1202-61
1-3/4 inch x 62 inch boom section
1
10-1203-31
1-1/2 inch x 8 inch boom splice
DB11 Yagi - Antenna Kit Contents
DB11 Hardware Kit
72-0050-11
QTY
SPARES
PART NUMBER
ITEM
30
2
60-0017
10-32 x 3/4" Pan head
30
4
60-0018
#10 Washer
32
2
60-0019
10-32 Nylock nut
28
2
60-0030
1/4 inch Nylock nut
16
2
60-0041
1/4 inch Washer
28
2
60-0046
5/16 inch Nylock nut
4
1
60-0062
1/4 inch x 2 3/4 inch bolt
8
1
60-0065
5/16 inch x 3 1/2 inch bolt
20
1
60-0075
5/16 inch x 3 1/4 inch bolt
10
1
60-0112
10-32 x 3/8 inch set screw
2
0
60-0113
10-32 x 5/8 inch pan head
24
1
60-0140
1/4 inch x 5/8 inch bolt
DB11 Saddle Kit
72-0052-11
QTY
PART NUMBER
ITEM
24
10-1601-03
1 3/4 in Aluminum Saddle
6
10-1152-11
DB11 Return Bracket, Top Plate
4
10-1601-22
2 in Aluminum Saddle

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DB11 Control Cable Kit
72-0010-41
QTY
PART NUMBER
ITEM
14’
21-5001-01
4 Conductor Cable
8’
21-5013
6 Conductor Cable
24”
09-1022
Coax Seal
DB11 Small Parts Kit
72-0051-12
QTY
PART NUMBER
DESCRIPTION
1
09-0001
Tape, ¾ PVC electrical QTY 1
1
09-0007
Silicone Wrap, Blue ½” x 10mm
12
09-0013-CUT
Grip Tape, 1 x 2 inch
1
09-1025
Conical Grinding Stone
1
10-1028-21
Anti-Seize Stick
12
10-1059-01
Polyolefin Heat Shrink 1-1/2” x 3”
1
10-1619-01
Coax switch bracket
6
60-0150
Cap for return tube .843
6
60-1006-41
Boot, DB11 return
12
60-6000-50
Hose Clamps, Type M

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EHU WIRING INSTRUCTIONS
Follow the directions below for wiring each of your element housing units (EHU) to the connector junction
box.
Trim approximately 1.5 inches of the outer jacket of the control cable (4 or 6 wire, depending on which EHU).
Remove the shield material, the support thread and cut the ground wire off as shown in figure 1.1.Attach electrical
tape at the end of the trimmed control cable jacket so that there is no chance for a short. Remove 0.25 inches of
the insulation from each of the individual 22 AWG wires, leaving bare copper. Figure 1.2 shows how the control
cable should look like when you are finished with the trimming. Dip each of the copper wires into connector
protector before inserting into the terminal plug. Figure 1.3 shows what the connector protector will look like.
The terminal header assembly consists of the terminal header and the terminal plug as shown in figure 1.4. The
plug is shipped loosely attached to the header. Remove this plug when wiring and firmly plug back in when
completed.
Follow the wire sequence in figure 1.5 for each EHU. The 6-pin wiring sequence is for the director and reflector
elements, and the 4-pin wiring sequence is for the driven element. Be careful to ensure that there are no bare wires
protruding out from the terminal clamps, to avoid potential shorts.
The wiring sequence for each EHU is also imprinted on the PCB that the terminal header is mounted on (located
inside the EHU), as shown in figure 1.4.Pay no attention to the second row of imprinted text, these pins are for use
in the manufacturing of the board itself and are of no use to you. Figure 1.4 shows a blue line crossing out the text
in question.
BLACK
RED
GREEN
WHITE
BLUE
BROWN
BLACK
RED
GREEN
WHITE
Figure 1.1
Figure 1.2
Figure 1.3
Figure 1.4
6 Pin Header Wiring Sequence
(EHU’s with Relays)
4 Pin Header Wiring Sequence
(EHU’s without Relays)
TERMINAL PLUG
TERMINAL HEADER
Figure 1.5

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EHU WIRING INSTRUCTIONS (CONTINUED)
Check to be sure the terminal plug is firmly inserted into the terminal header.
Lay the control cable wire inside the wire tray of the EHU as shown in figure 1.6. This trough acts as a strain relief
so that the cable will not be pulled out of the EHU. It is a good idea to leave a small amount of slack between the
plug and the point which the tray starts as shown in figure 1.7.
Using the coax seal and cut into 1-inch strips as shown in figure 1.8. You will need three strips. The remainder can
be used to seal the driven element SO239 connectors, should you wish to.
Apply coax seal on top of the control cable and work it around the cable and on top of the cable tray as shown in
figure 1.9. This will help keep water from entering the EHU. Apply the coax seal to the remaining areas of the wire
tray as shown in figure 1.10.
Repeat wiring and coax seal preparation for each EHU. When finished, the EHU’s will be secured to the aluminum
element mounting plates. This is covered in detail later.
Figure 1.6
Figure 1.7
Figure 1.8
Figure 1.9
Figure 1.10

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RECOMMENDED TOOLS FOR ASSEMBLING THE ANTENNA
STARTING ASSEMBLY
In the hardware kits we have provided extra hardware. This is a precaution in case fasteners are
lost or damaged during assembly.
A large, cleared flat area is ideal for assembly of an antenna of this size and complexity. Typically,
an area 16ft x 24ft would be ideal. We recommend using sawhorses or sturdy tables when
installing the boom. By having the boom elevated, it is easier to ensure that the elements are
level.
If you do not have room near the tower to assemble the antenna, we suggest you find a place that
you can put the antenna together in its entirety and then disassemble as needed for transportation
to the tower area.
Use of a level for adjusting the Element Housing Units (EHU’s) is highly recommended. This is a
surprisingly accurate and consistent method. Simply place the level on the mast plate and adjust
each element accordingly.
12” Level
Razor Knife
25’ Tape Measure
3/32 allen wrench
5/16”, 7/16”, 1/2”, 9/16”, 3/8” sockets and wrench (deep
well works best)
2 work benches (saw horses or clamping work
benches work the best)
Screwdriver #1 Flat head
5/16” nut driver (or drill works well with driver bit)
#1 Phillips
Pliers
#2 Phillips
Hammer
Volt-ohm meter
Wire Cutters and strippers
Torque wrench (capable of 5-20 ft lbs) (6.8-27.1 Nm)

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BOOM ASSEMBLY PROCEDURE
Locate boom pieces in the Antenna Boom Box
QTY 1 1 3/4” x 62” Aluminum Tube
QTY 1 1 3/4” x 72” Aluminum Tube
QTY 1 1 1/2” x 8” Center Splice Tube
Always apply anti-seize lubricant to stainless steel hardware. This will prevent galling, which
destroys the bolts and can be a real problem getting apart. Each bolt has a specific length for the
aluminum boom piece it is holding together. The bolts will be a little bit long, so we provide you
with 4 stainless steel washers per bolt to make up the difference. It is critical you use these
washers, so that only the shank of the bolt is engaging the aluminum tubing
•Apply a thin film of anti-seize or a spray-on lubricant (i.e. WD-40, Dry Lube) to the male
engagement area of the boom sections.
•Secure the bolts nuts and washers onto the boom. Each boom bolt will require four of the
washers, used as spacers.
•Repeat this for each section until the boom is completely assembled as shown in figure 2.
Figure 2 Boom Assembly
Add lubricant here
QTY 4: 60-0065
5/16 x 3-1/2 BOLT
QTY 4: 60-0030
1/4 Nylock Nut
QTY 16: 60-0041
1/4 Washer

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MAST PLATE ASSEMBLY
Locate the parts shown in figure 3 below and use figure to assemble the mast plate onto the boom.
Pay close attention to the orientation of the mast plate on the boom. Notice that the mast plate is not
centered on the boom section joint but is slightly offset towards the longer 72 inch boom section. Two of
the aluminum saddle clamps will clamp directly on the joint between the boom sections.
Figure 3 Mast Plate Assembly
QTY 8: 60-0065
5/16 x 3-1/2 BOLT
QTY 8: 60-0030
1/4 Nylock Nut
QTY 8: 10-1601-22
2”Aluminum Saddle
QTY 1: 10-1021-43
Boom Plate

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ELEMENT HOUSING UNIT SPACING
Locate the three Element Housing Units (EHU) with gaskets, in the Antenna Box
QTY 1 Driven EHU 20m (This is the only EHU that uses 4 conductor wire)
QTY 2 Director / Reflector EHU DB11 (both are identical and use 6 conductor wire)
Note: Refer to figure 5 on the following page for the hardware required to connect the EHU’s to the boom.
Spacing of the elements in relation to each other is CRITICAL. Take great care to ensure that the
elements are mounted as shown in figure 4 below. All dimensions are taken from the center of the
element, which is the center-point of the fiberglass tube that houses the copper beryllium strip, both at the
EHU and at the return EST.
Figure 4



  

  


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ELEMENT HOUSING ASSEMBLY PROCEDURE
•Attach the appropriate EHU to the mounting plate and return mounting bracket. Then attach the
•mounting plates to the boom. See figure 5.
•Use a level to check the EHU and Return mounting bracket before tightening the aluminum saddles to
the boom. When the plate is level tighten the saddle bolts to 20 ft/lbs (27.09Nm).
Figure 5 EHU Mounting Overview
QTY 8: 60-0138
1/4 x 5/8 Bolt
QTY 2: 60-0075
5/16 x 1/4 Bolt
QTY 2: 10-1152-11
Return Clamp
QTY 1: 10-1151-11
Return Bracket
QTY 8: 60-0030
1/4 Nylock Nut
QTY 6: 60-0046
5/16 Nylock Nut
QTY 10: 60-0019
5/16 Nylock Nut
QTY 10: 10-1601-03
1-3/4 Aluminum Saddle
QTY 1: 70-2030-01
Element Mounting
Plate w/Center Gasket
QTY 4: 60-0075
5/16 x 3-1/4 Bolt
QTY 1: 10-1502-01
EHU Gasket
EHU:
DIR, REF: 70-3407-01
DVR: 70-3401-01
QTY 10: 60-0018
#10 Flat Washer
QTY 10: 60-0017
#10 x 3/4 Pan Head

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WIRING THE CONTROL CABLE TO THE ANTENNA SWITCH
Locate the following kits:
QTY 1
72-0010-41
DB11 Cable Kit
QTY 1
70-3001-01
COAX Switch Assy
Note: Refer to figure 7 for assembly hardware required for this step.
•Follow figure 6 for wiring the control cable to the Coax Antenna Switch
•Once wired correctly, the cable must be pulled through the drain hold on the lid of the Coax Antenna
Switch.
•The loose end of the control cable will be wired to the connector junction box. This procedure will be
completed in a later step of the assembly process. For now, let the control cable hang unattached while
the coax antenna switch is mounted to the antenna.
•DO NOT secure the lid and gasket to the enclosure until the final testing has been completed.
Figure 6 Control Wiring for Coax Antenna Switch
COAX Switch w/Housing Removed
Control cable to
Connector
Junction Box

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MOUNTING THE COAX ANTENNA SWITCH
•Attach the Coax Switch Bracket to the Antenna Switch Housing Lid.
•Attach the assembly to the boom, WITHOUT the housing and gasket (as shown in figure 7.) The
housing and gasket will be installed later after testing is completed.
Figure 7 Coax Antenna Switch Assembly
QTY 2: 60-0075
5/16 x 3-1/4 SS Hex Bolt
QTY 1: 10-1619-01
Coax Switch Bracket
QTY 2: 60-0046
5/16”Nylock Nut
QTY 2: 10-1601-03
Aluminum Saddle
DIRECTOR EHU
QTY 2: 60-0113
#10 x 5/8 SS Pan Head
QTY 4: Flat Head Screw
(Located in small Ziplock bag)
Antenna Switch board
mounted to housing lid
Antenna Switch housing
gasket (cut to length) (DO
NOT mount until all testing
is completed
Antenna Switch housing
gasket (cut to length) (DO
NOT mount until all testing
is completed
QTY 2: 60-0019
#10-32 Nylock Nut

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WIRING THE COAX CABLE TO THE ANTENNA SWITCH
Note: Take care not to bend the cable over any sharp corners of the boom assembly, or
particularly, the top plate on the antenna tower, or the cable could be damaged. Do not bend the
cable in a smaller diameter than 10 inches. Do not clamp anything over the cable that could
possibly pinch, or damage it. A short-circuit of the cable may cause damage to the electronic
controller.
•The coax cables have been made specifically for each individual element.
•Follow figure 8 and figure 9 below for connecting the coax to the antenna switch box. Tighten all
coax connectors with pliers to ensure a good connection.
•Weather-proofing should be done when all testing and assembly have been completed.
Figure 8 Wiring Coax to Elements
Coax Antenna Switch
For details on wiring the Coax Antenna
Switch refer to
Figure 9
below. The lid
of the Coax Antenna Switch should not
be attached yet.
DIRECTOR
DRIVEN
REFLECTOR
DB11
Figure 9
Wiring Coax Antenna Switch
Bottom View of Coax Antenna Switch
Director EHU Feed from shack
OUT 2
OUT 1
OUT 3
Control cable that will be
wired into the connector
box.
Driven EHU
Reflector EHU

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SECURING THE COAX AND ELEMENT CONTROL CABLE TO THE BOOM
Note: Take care not to bend the coax or control cable over any sharp corners of the boom assembly, or
particularly, the top plate on the antenna tower, or the coax/control cable could be damaged. Do not clamp
anything over the coax/control cable that could possibly pinch, or damage it.
When taping the cable to the boom, start on the ends of the boom and work towards the mast plate. This
will allow you to trim the cable to the exact length if desired.
We recommend labeling all the wires at the connector junction box location. Knowing which wire goes to
each EHU could be very handy in the event of any control cable issues later when the antenna is in the
air!
•Secure the coax and control cables from the EHU’s to the boom.
•Use the outdoor electrical tape (09-0001) to secure the cable to the boom Only two wraps of the tape
are needed to hold the cable to the boom.
•Tape the control cable and coax cable to the boom approximately every two feet.
•Once both cables have been secured to the terminal housing or connector junction box, the control
cable can be trimmed to length or coiled up and out of the way.
WIRING THE ELEMENT HOUSINGS
Refer to the connector junction box manual for instructions on how to install the junction box and wire the
elements. The diagram of the DB11 wiring is found on page 8 of the connector junction box manual. You’ll
already have wired the control cable to the EHUs on page 8 of this manual so now you’ll need to connect
those control cable wires to the connector junction box.
The diagram on the following page shows more details on how to connect the control cable to the 25 pin
connector. By default your antenna comes with a 25 pin connector which requires soldering. A solderless
Dsub field splice connector is available as an option. Pay close attention to match the wire color with the
correct pin number, incorrect wiring may damage your controller or EHUs!

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

 



Pin
24 Conductor
DB42, DB36
(w/80m)
16 Conductor
4E, DB36 (No 80m)
16 Conductor
DB11, DB18/18E
12
Conductor
2E, 3E
2x4 Conductor
BigIR/SmallIR
w/Coil
4 Conductor
BigIR, SmallIR,
Dipole
1
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
2
WHITE
RED
RED
BROWN
RED
RED
3
WHITE/BLACK STRIPE
GREEN
GREEN
RED
GREEN
GREEN
4
BLACK/WHITE STRIPE
WHITE
WHITE
ORANGE
WHITE
WHITE
5
BLUE
BROWN
BROWN
YELLOW
BLACK
6
BLUE/WHITE STRIPE
BLUE
BLUE
GREEN
RED
7
BLUE/RED STRIPE
ORANGE
ORANGE
BLUE
GREEN
8
BLUE/BLACK STRIPE
YELLOW
YELLOW
VIOLET
WHITE
9
ORANGE
VIOLET
VIOLET
GREY
10
ORANGE/RED STRIPE
GREY
GREY
WHITE
11
ORANGE/BLACK STRIPE
PINK
PINK
PINK
12
GREEN
CREME
CREME
CREME
13
BLACK/RED STRIPE
WHITE/ORANGE STRIPE
14
ORANGE/GREEN STRIPE
WHITE/BLACK STRIPE
15
WHITE/BLACK-RED
WHITE/RED STRIPE
16
RED/BLACK-WHITE
WHITE/GREEN STRIPE
17
BLACK/WHITE-RED
WHITE/ORANGE STRIPE
18
GREEN/WHITE STRIPE
19
GREEN/BLACK STRIPE
20
RED
21
RED/WHITE STRIPE
22
WHITE/RED STRIPE
WHITE/RED STRIPE
23
RED/BLACK STRIPE
WHITE/BLACK STRIPE
24
RED/GREEN STRIPE
WHITE/GREEN STRIPE
Solder the unshielded drain wire of the control cable to the chassis (ground) of the Standard 25 Pin Connector, or one of the “G” pins on the optional Field Splice Connector





 

Standard DB-25 Soldered Connector
DB-25 Field Splice Connector

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PRELIMINARY WIRING AND MECHANICAL EHU TESTING
Read the SDA-100 Operators Manual so that you are familiar with operation of the controller. You will also need an
ohm meter or continuity tester for most of these tests. At this time the controller should NOT be connected to your
radio or computer. Also, the coax jumper cables and fiberglass poles should not be installed on the antenna.
EHU Test:
1. With the control cable NOT CONNECTED to the controller, turn the controller on. It should read “Manual Mode
Elements Home”. If not, push the “Retract” button. After the controller is finished tuning it may turn off and, if
so, you will need to turn the controller back on. The controller will now read “Manual Mode Elements Home”.
2. ENSURE THAT ALL THE ELEMENTS ARE CLEAR OF ANY OBSTRUCTIONS. The copper tape will be
extended out from both sides of each EHU for approximately 6 inches.
3. Go into Setup mode and select “Create/Modify”.
4. Now CONNECT the control cable to the controller.
5. Select each element (you can only do one at a time), REF, DVR, D1 and extend them to around 16” as
indicated on the controller display. There will be approximately 3 inches of copper strip protruding out of each
side of the EHU. This will allow you to put an ohm meter probe on the copper tapes during the tests.
Clarification of the abbreviations on the screen of the SDA 100 controller: REF is the reflector, DVR is the driven
element, and D1 is the director.
6. If at this point if any of the tapes do not extend, or the individual EHU/element does not correspond to the
correct controller description, (I.E.: The Antenna Reflector is controlled by the REF position on the controller.)
STOP, retract the elements, disconnect the control cable and correct any wiring errors. Then start at the
beginning of these instructions.
7. Now DISCONNECT the control cable BEFORE exiting “Create/Modify”. (This is to prevent the elements from
moving when changing the controller to the first test frequency. Exit “Create/Modify” by pushing the “Setup”
button.)
8. Set the controller to the “Normal” direction by pushing the button labeled “Norm”. The green LED next to the
button should light.
9. Set the controller to any frequency in the 17m band.
10. When the controller indicates it is no longer trying to move the elements (the LED labeled “Tuning” will stop
flashing) RECONNECT the control cable again.

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11. Set your ohm meter to a low ohms scale (around 200 ohms or so).
12. Measure the resistance on each of the three elements (Driven, Ref, D1) between the center conductor of the
SO-239 on the EHU and EACH of the two copper tape elements on that same EHU as shown in figure 5.31 and
Figure 5.32. The Driven element should measure a very low resistance of 3 ohms or less (has Continuity) while
REF and D1 should measure as an OPEN circuit (a very high resistance value, NO continuity). Note that when
an element is in the “driven” mode there will be continuity between the copper tapes on that EHU. Rest assured
it is only a short at DC and not RF frequencies, this is intended by the design of the balun.
Coax Switch Test:
13. On the antenna Coax Switch Box, use the ohm meter to verify there is very low resistance, less than 3 ohms
(has continuity) between the center conductor of the SO-239 connector labeled “IN” and the center conductor of
the SO-239 labeled “OUT3” as shown in figure 5.33. Verify that an Open circuit (very high resistance reading,
no continuity) exists between the center pin of the “IN” coax connector and “OUT1” center pin as shown in figure
5.34 and also between “IN” and “OUT2” coax connector center pins as shown in figure 5.35.
14. If any of these tests fail, STOP, Push RETRACT, DISCONNECT the controller cable and check your wiring and
correct any mistakes. Then restart the test procedure at the beginning.
15. If all the tests results are good from step 15, DISCONNECT the control cable.
16. Set the controller to any frequency in the 20m band and stay in the “NORM” direction and wait for the “Tuning”
LED to stop.
17. RE-CONNECT the control cable. Now D1 is the driven element and should measure less then 3 ohms (has
continuity) between the EHU coax connector center pin and EACH of the two copper elements. The Driven is
not used on 20m and is disconnected by the Coax Switch Box. The REF EHU should now measure as an
OPEN circuit (very high resistance, no continuity) between the coax connector center pin and EACH of the
copper tapes.

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18. The antenna Coax Switch Box should now measure less than 3 ohms (has continuity) between the “IN” coax
connector center pin and the “OUT1” connector center pin. There should also be an OPEN circuit (very high
resistance, No continuity) between “IN” and “OUT2” coax connector center pins and also between “IN” and
“OUT3” coax connector center pins.
19. DISCONNECT the control cable from the back of the controller.
20. Set the controller to the “180” direction, stay on the same 20m frequency, and wait for the “Tuning” LED to stop.
21. RE-CONNECT the control cable and repeat the above procedure except now REF is the driven element and
should measure less than 3 ohms (has continuity) between the EHU coax connector center pin and the EACH
of the copper tapes. The Driven EHU is still not used on 20m. D1 EHU should now measure as an OPEN
circuit (no continuity, very high resistance) from the center pin of the coax connector to EACH of the copper
tapes.
22. The antenna Coax Switch Box should now measure less than 3 ohms (has continuity) between the “IN” coax
connector center pin and the “OUT2” connector center pin. There should be an Open circuit (No continuity, very
high resistance) between the center pin of the “IN” coax connector and “OUT1” connector center pin and also
the “IN” and “OUT3” coax connector center pins.
23. If the results of these tests are good DISCONNECT the control cable. On the controller push the “SETUP”
button and select “RETRACT ELEMENTS” and choose “YES”. Wait until the “Tuning” LED stops.
24. RE-CONNECT the control cable. You should still be in “SETUP”. Scroll through and select “CALIBRATE” and
then choose “YES”. The copper tape will go back into the EHUs, and you will now hear a ratcheting sound for
approximately 70 seconds. When finished the controller and antenna are now synchronized.
25. Push “POWER” and the controller will now turn off. DISCONNECT the control cable.
26. This concludes the tests and verifies the antenna is wired correctly and that all of the relays are switching
correctly.