DX Engineering SkyHawk 3X10 Manuale utente

SkyHawk 3X10

20/15/10 Meter Tri-Band

Yagi Antenna

DXE-3X10-INS Rev 1b

1200 Southeast Ave. - Tallmadge, OH 44278 USA

Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200

Fax: (330) 572-3279 ∙ E-mail: DXEngi[email protected]

DX Engineering SkyHawk 3X10

Congratulations on the purchase of your DX Engineering SkyHawk 3X10. You now possess the

finest computer optimized tri-band on the market. The SkyHawk

features low weight, zero mast torque, a balanced beam and high wind

survival. Corrosion and UV resistant materials are used throughout its

construction. Only stainless steel fasteners and rivets are used. Custom

designed aluminum extrusions make assembly a snap. Multiple wall

boom construction, eliminating the need for stays, coupled with ultra

thin trap-free riveted elements significantly reduces wind load.

DX Engineering SkyHawk Tri-Band Yagi Antennas are the choice of experienced DXers, especially if

your interest is HF contesting. The DX Engineering SkyHawk provides the highest payback in

performance and operating pleasure compared to any other single component in your station.

This well-designed, single-tower system offers outstanding performance without the headaches of

maintaining more substantial antenna farms. DX Engineering SkyHawk antenna reflects the latest

computer-optimized design for maximum gain and bandwidth. It is built from the finest materials,

including all stainless steel hardware.

The SkyHawk antenna offers minimal wind-loading for its size and is torque-balanced to reduce wear and

tear on your rotor. Assembly is easy, as tower top adjustments have been eliminated and the elements are

truly locked in place.

DX Engineering SkyHawk features include:

EZ-mount system for attaching antenna to mast

All parts de-burred

Stainless steel pop-riveted elements

Quality COMTEK balun and balun mounting system

No user adjustment required - just assemble and put it up

Additional specifications include:

20 meters:

Three elements

Effective boom length: 23 ft.

VSWR: less than 1.4:1 between 14.0 and 14.35 MHz, measured at feed-point

Front to back: >20 dB across the entire band

F/B peaks at 14.150 MHz at 21 dB

Gain: better than 7 dBi across band

7.4 dBi gain at 14.350 MHz

15 meters:

Three elements

Effective boom length: 15 ft., 6 in.

VSWR: less than 1.5:1 between 21.0 and 21.45 MHz, measured at feed-point

Front to back: >16 dB across the entire band

F/B peaks at 21.350 at 24.5 dB

Gain: better than 7 dBi across band

7.6 dBi gain at 21.45 MHz

10 meters:

Four elements

Effective boom length: 16 ft., 9 in.

VSWR: less than 1.5:1 between 28.0 and 28.9 MHz, measured at feed-point

Front to back: >14 dB across the entire band

F/B peaks at 28.5 at 15 dB

Gain: better than 7.7 dBi across band

9.2 dBi gain at 28.9 MHz

NOTE: ALL DIMENSIONS IS THIS INSTRUCTION ARE IN INCHES (MILLIMETERS)

UNL

ESS

OTHERWISE NOTED.

Required Tools

Rivet tool: POP Rivetool PRG 430, POP Rivetool PRGIII or equivalent

Flat blade screwdriver

Nut Driver: 11/32”and 3/8”nut driver

Wrench: 7/16”and 1/2”

Pair of saw horses or similar support

Permanent marker

Before You Start

WARNING: INSTALLATION OF THIS PRODUCT NEAR POWER LINES IS DANGEROUS.

FOR YOUR SAFETY FOLLOW THE INSTALLATION INSTRUCTIONS.

WARNING: AT NO TIME DURING ASSEMBLY, INSTALLATION, ADJUSTMENT, OR

OPERATION SHOULD ANY PART OF THIS PRODUCT BE ALLOWED TO COME INTO

CONTACT WITH ELECTRIC POWER LINES, NOR SHOULD THIS PRODUCT BE

INSTALLED IN SUCH A WAY

ANY PART OF IT MAY CONTACT POWER LINES

DURING NORMAL OPERATION OR IN THE EVENT OF STRUCTURAL FAILURE.

FAILURE TO EXERCISE EXTREME CARE IN THIS

TTER

CAN RESULT IN DAMAGE

TO PROPERTY, PERSONAL INJURY OR

DEA

TH.

Before you start assembling the antenna, read through the instructions completely, paying special

attention to the diagrams. When you unpack the box, do so on a surface where you will not lose

small parts. Check the parts against the PARTS LIST, identifying each part carefully.

NOTE: Check to see that all parts are present before beginning assembly.

Installation Notes

CHOOSING AN INSTALLATION SITE: As with all directional antennas, care must be taken in

the choice of an installation site for your SkyHawk 3X10. Select a place clear of power lines or

other obstructions. The SkyHawk 3X10 should be mounted at least 30 ft (9.1 m) above the ground

for proper operation. If the SkyHawk 3X10 is mounted a full-wave above ground, the takeoff angle

is 14° with a minor lobe at 40° or so. For a 1/2-wave it’s closer to 20°. At mounting heights below

1/2-wave the takeoff angle is much greater than 20°. There’s no easy way to calculate it, but there

are graphs for wave angles at heights of 1/4, 1/8 and so on in any edition of the A.R.R.L. Antenna

Handbook. The SkyHawk 3X10 should be able to rotate without hitting anything. Finally, it

should not be near any large masses of metal, like metal roofing or siding. Plan your installation so

that metallic guy wires are broken up with compression insulators and no other antennas are nearby,

i.e. dipoles mounted right under the beam.

MASTS AND GUYING: In order to avoid coupling between antenna elements and guy wires that

can de- tune the antenna it may be necessary to break up the guy wires with insulators. If the

separation between

the antenna and the highest set of guys is less than 15' (4.6m) it would be a good

idea to use insulators on each of the uppermost guys at intervals of 10' (3m). Place the first

insulator on each

guy AT

THE MAST OR TOWER, for that too is a conductor that can be coupled

to the antenna by any horizontal or near-horizontal guy wire connected to it.

Rivet Installation

The elements of your SkyHawk 3X10 are assembled with two or three blind rivets per joint. Blind

rivets were chosen to provide fast, strong, reliable, vibration proof assembly, with high grip and

pull-up strengths. Open end stainless steel rivets are used because they provide better than 80%

more shear and tensile strength than closed end aluminum rivets. Blind rivets are easily set by:

1. Line up the holes in each tube as shown in the diagram.

2. Insert a blind rivet in each hole.

3. Making sure the rivet is fully seated, set the rivet with rivet tool.

4. Repeat step 3 for the other rivets.

If for some reason you need to remove a blind rivet: Blind rivets may easily be removed by

drilling through them with a 1/8(3) drill bit. Be careful not to drill through the entire element and

be sure to remove any remnants left from the removed rivet.

Fastener Assembly

Installing and tightening fasteners is a simple procedure but one which is often done incorrectly.

Tightening fasteners to the proper torque keeps bolts tight, increases joint strength, creates friction

between parts to resist shear and improves the fatigue resistance of the connection. Unfortunately

fasteners are usually over tightened causing them to fracture or at least causing thread damage

making them impossible to disassemble.

It is strongly recommended that a lubricant such as JTL-12555 Jet-Lube SS-20 Pure Copper Anti-

Seize be used on the threads to reduce friction which allows the fastener to be properly tensioned.

The best way to properly tension a fastener is to tighten the nut until the lock washer is flat and then

tighten it no more than an additional one quarter turn. This rule should be followed except for U-

bolts and the 1/4 x 2-3/4(70) boom to saddle screw where one additional full turn is required.

Tubing Assembly

In order to decelerate oxidation and to improve electrical conductivity a high quality RF conductive

anti-oxidizing compound should be used. JTL-12555 Jet-Lube SS-30 is an ideal electrical joint

compound that ensures proper electrical connections between aluminum and copper metal parts

such as conductors, telescoping aluminum tubing, or other antenna and grounding parts. Apply a

thin layer to each metal to metal antenna connection with a brush or clean cloth. Be careful not to

accumulate excess material on other parts or yourself as it’s quite difficult to remove and virtually

impossible to clean out of clothing.

Parts List

10 Meter Reflector

00585SZC

Qty

Description

Size

Part Number

□

Element Section A 10M

3/4(19) x 28(711)

00589RZC

□

Element Section B 10M

5/8(16) x 35-7/8(911)

00531BAC

□

Element Section C 10M Reflector

1/2(12) x 71-1/8(1,807)

00533BAC

10 Meter Driven

00993SZC

Qty

Description

Size

Part Number

□

Element Insulator Driven

00985FAC

□

Element Section A 10M Driven

3/4(19) x 24(356)

00974RZC

□

Element Section B 10M Driven

5/8(16) x 38(965)

00986BAC

□

Element Section C 10M Driven

1/2(13) x 68-43/64(1,744)

00987BAC

10 Meter Director 1

00587SZC

Qty

Description

Size

Part Number

□

Element Section A 10M

3/4(19) x 28(711)

00589RZC

□

Element Section B 10M

5/8(16) x 35-7/8(911)

00531BAC

□

Element Section C 10M Director 1

1/2(13) x 63-23/32(1,618)

00535BAC

10 Meter Director 2

00588SZC

Qty

Description

Size

Part Number

□

Element Section A 10M

3/4(19) x 28(711)

00589RZC

□

Element Section B 10M

5/8(16) x 35-7/8(911)

00531BAC

□

Element Section C 10M Director 2

1/2(13) x 66-9/16(1,640)

00536BAC

15 Meter Reflector

00580SZC

Qty

Description

Size

Part Number

□

Element Section A 15M

3/4(19) X 47-7/8(1,216)

00581RZC

□

Element Section B 15M

5/8(16) X 59-7/8(1,521)

00530BAC

□

Element Section C 15M

1/2(13) X 71-7/8(1,826)

00532BAC

□

Element Section D 15M Reflector

3/8(10) X 28-15/32(723)

00540BAC

15 Meter Driven

00994SZC

Qty

Description

Size

Part Number

□

Element Insulator Driven

00985FAC

□

Element Section B 15M Driven

3/4(19) X 23-7/8(606)

00975RZC

□

Element Section C 15M Driven

5/8(16) X 59-7/8(1,521)

00988BAC

□

Element Section D 15M

1/2(13) X 71-7/8(1,826)

00532BAC

□

Element Section D 15M Driven

3/8(10) X 23-5/8(600)

00989BAC

15 Meter Director

00584SZC

Qty

Description

Size

Part Number

□

Element Section A 15M

3/4(19) X 47-7/8(1,216)

00581RZC

□

Element Section B 15M

5/8(16) X 59-7/8(1,521)

00530BAC

□

Element Section C 15M

1/2(13) X 71-7/8(1,826)

00532BAC

□

Element Section D 15M Director

3/8(10) X 14-5/64(358)

00542BAC

20 Meter Reflector

00576SZC

Qty

Description

Size

Part Number

□

Element Section A 20M

1(25) X 47-7/8(1,216)

00577RZC

□

Element Section B 20M

7/8(22) X 47-7/8(1,216)

00524BAC

□

Element Section C 20M

3/4(19) X 71-7/8(1,826)

00526BAC

□

Element Section D 20M

5/8(16) X 65-7/8(1,673)

00529BAC

□

Element Section E 20M

1/2(13) X 47-7/8(1,216)

00537BAC

□

Element Section F 20M Reflector

3/8(10) X 47-7/32(1,199)

00538BAC

20 Meter Driven

00521FAC

Qty

Description

Size

Part Number

□

Element Insulator 20M Driven

00521FAC

□

Element Section A 20M Driven

1(25) X 23-7/8(606)

00572RZC

□

Element Section B 20M Driven

7/8(22) X 47-7/8(1,216)

00525RZC

□

Element Section C 20M

3/4(19) X 71-7/8(1,826)

00526BAC

□

Element Section D 20M

5/8(16) X 65-7/8(1,673)

00529BAC

□

Element Section E 20M

1/2(12) X 47-7/8(1,216)

00537BAC

□

Element Section F 20M Driven

3/8(10) X 28-3/16(716)

00990BAC

20 Meter Director

00579FAC

Qty

Description

Size

Part Number

□

Element Section A 20M

1(25) x 47-78(1,216)

00577RZC

□

Element Section B 20M

7/8(22) X 47-7/8(1,216)

00524RZC

□

Element Section C 20M

3/4(19) X 71-7/8(1,826)

00526BAC

□

Element Section D 20M

5/8(16) X 65-7/8(1,673)

00529BAC

□

Element Section E 20M

1/2(12) X 47-7/8(1,216)

00537BAC

□

Element Section F 20M Director

3/8(10) X 10-1/2(267)

00543BAC

Boom

Qty

Description

Size

Part Number

□

Boom Section A

2(51) X 71-7/8(1,826)

00601BBC

□

Boom Section B

2(51) X 71-7/8(1,826)

00602BBC

□

Boom Section C

2(51) X 71-7/8(1,826)

00603BBC

□

Boom Section D

2(51) X 71-7/8(1,826)

00604BBC

□

Boom Splice A

1-7/8(48) X 71-3/4(1,822)

00605BBC

□

Boom Splice B (Double Wall Tube)

1-7/8(48) X 71-3/4(1,822)

00655SZC

□

Boom Splice C

1-7/8(48) X 71-3/4(1,822)

00607BBC

□

Element Compensator

1.9(48) X 56(1,422)

00562FAC

Hardware

Qty

Description

Size

Part Number

□

Element Saddle

1-1/4

0053EAC

□

Element Saddle

0054EAC

□

Boom Saddle

0555EAC

□

Mast Saddle

0556EAC

Boom/Mast Plates

00837SZC

Qty

Description

Part Number

□

1/4-20 HEX NUT 18-8 (7/16 X 7/32)

00056JAV

□

1/4 SPLIT RING LW 18-8

00057JAV

□

#10 SPLIT RING LW 18-8

00133JZV

□

#10-32 X 3/8 PHIL RND HD MS 18-8

00191JZV

□

MAST PLATE

00551BAC

□

BOOM PLATE

00552BAC

□

5/16-18 X 1 HEX WAS HD CS 18-8

00567JAC

□

5/16-18 HEX NUT 18-8 (1/2 X 17/64)

00568JAC

□

5/16 SPLIT RING LW 18-8

00570JAC

□

1/4-20 X 2-3/4 PHIL RND HD MS 18-8

00595JAC

□

5/16-18 X 2 X 3-1/8 U-BOLT 18-8

00597JAC

□

U-BOLT SADDLE 2

00598EAC

□

5/16 FLAT WASHER 18-8 (11/32 X 11/16 X 1/16)

00600JAC

□

5/16-18 HEX SERRATED FLANGE NUT 18-8 (1/2 X 9/32)

00834JZC

□

5/16-18 X 1-1/4 HEX HD CS 18-8

00835JZC

COMTEK Balun Assembly

DXE-BAL-

YAGI-UPG

Qty

Description

□

COMTEK BALUN WITH MOUNTING PLATE ASSEMBLY and Hardware

□

BALUN CLAMP ASSEMBLY

Boom Compensator

00839SZC

consists of the

parts listed

Qty

Description

□

#10 SPLIT RING LW 18-8

□

#10-24 HEX NUT 18-8 (3/8 X 1/8)

□

#10-24 X 3/4 PHIL RND HD MS 18-8

□

BOOM COMPENSATOR BRACKET

□

BOOM COMPENSATOR

Boom Hardware Package

00991SZC

consists of the

parts listed

Qty

Description

□

1/4-20 HEX NUT 18-8 (7/16 X 7/32)

□

1/4 SPLIT RING LW 18-8

□

1/4-20 X 2 X 2-11/16 U-BOLT 18-8

□

1/4-20 X 5/8 PHIL RND HD MS 18-8

□

1/4-20 X 2-3/4 PHIL RND HD MS 18-8

□

PROTECTIVE CAP 2

Driven Element Boom Hardware Package

00992SZC

consists of the

parts listed

Qty

Description

□

1/4-20 HEX NUT 18-8 (7/16 X 7/32)

□

1/4 SPLIT RING LW 18-8

□

COMPRESSION CLAMP SMALL ADJUSTABLE

□

1/4-20 X 5/8 PHIL RND HD MS 18-8

□

ELEMENT SADDLE 1 DRIVEN

□

ELEMENT SADDLE 1-1/4 DRIVEN

□

ELEMENT SPACER

□

FEED STRAP

Element Hardware Package

00996SZC

consists of the

parts listed

Qty

Description

□

# 8 SPLIT RING LW 18-8

□

# 8-32 HEX NUT 18-8 (11/32 X 1/8)

□

PROTECTIVE CAP 1/2

□

PROTECTIVE CAP 3/8

□

# 8-32 X 1-1/2 PHIL RND HD MS 18-8

□

136

1/8 X 17/64 POP RIVET 18-8

Assembly - Driven Elements

10DR

15DR

20DR

□

Locate the bag for the element you wish to assemble.

□

Locate one of the B element sections and slide the side with one hole into one of the A

element sections so all holes line up.

NOTE: If the holes don’t line up exactly, rotate one or both of the elements 180°.

□

Insert one end of the element insulator into the above assembly. Line up the holes and

pass a # 8 x 1-1/2 in (38 mm) screw followed by a # 8 lock washer and hex nut. Hand

tighten

□

Slide the side with one hole of the other B element section into the remaining A

element section so all the holes line up.

□

Insert the other end of the element insulator into the above assembly. Line up the hole

sand pass a # 8 x 1-1/2 in (38 mm) screw followed by a # 8 lock washer and hex nut.

Hand tighten

□

Locate one of the C element sections and insert the side with the two holes furthermost

from the end into one of the B element sections. Line up all the holes and secure with

two rivets.

□

Place a large cap over each element tip

□

Identify the completed 10 meter element section with a felt tip marker.

□

Locate one of the C element sections and insert the side with the three holes

furthermost from the end into one of the B element sections. Line up all the holes and

secure with three rivets.

□

10.

Insert the other C element section into the other B element section as above and secure

with three rivets.

□

11.

Locate one of the D element sections and insert the side with the two holes furthermost

from the end into one of the C element sections. Line up all the holes and secure with

two rivets.

□

12.

Insert the other D element section into the other C element section as above and secure

with two rivets.

□

13.

Place a small cap over each element tip.

□

14.

Identify the completed 15 meter element section with a felt tip marker.

□

15.

Locate one of the E element sections and insert it into one of the D element sections.

Line up all the holes and secure with two rivets.

□

16.

Insert the other E element section into the other D element section as above and secure

with two rivets.

□

17.

Locate one of the F element sections and insert it into one of the E element sections.

Line up all the holes and secure with two rivets.

□

18.

Insert the other F element section into the other E element section as above and secure

with two rivets.

□

19.

Place a small cap over each element tip

□

20.

Identify the completed 20 meter element section with a felt tip marker.

Assembly - Elements

10D2

10D1

10R

15D

15R

20D

□

Locate the bag for the element you wish to assemble.

□

Locate one of the B element sections and insert the side with the three

holes furthermost from the end into one side of the A element section.

Line up all the holes and secure with rivets.

□

Insert the other B element section into the other side of A element section

as above and secure with rivets.

□

Locate one of the C element or tip sections and insert the side with the

two or three holes furthermost from the end into one of the B element

sections. Line up the all the holes and secure with rivets.

□

Insert the other C element or tip section into the other B element section

as above and secure with rivets.

□

Place a small cap over each element tip

□

Identify the completed 10 meter element section with a felt tip marker.

□

Locate one of the D element or tip sections and insert the side with the

two holes furthermost from the end into one of the C element sections.

Line up all the holes and secure with two rivets.

□

Insert the other D element or tip section into the other C element section

as above and secure with two rivets.

□

10.

Place a small cap over each element tip

□

11.

Identify the completed 15 meter element section with a felt tip marker.

□

12.

Locate one of the E element sections and insert it into one of the D

element sections. Line up all the holes and secure with two rivets.

□

13.

Insert the other E element section into the other D element section as

above and secure with two rivets.

□

14.

Locate one of the tip sections and insert it into one of the E element

sections. Line up all the holes and secure with two rivets.

□

15.

Insert the other tip section into the other E element section as above and

secure with two rivets.

□

16.

Place a large cap over each element tip.

□

17.

Identify the completed 20 meter element section with a felt tip marker.

Indice

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