Hy-Gain AV-640 Manual de usuario

AV-640

8 Band Vertical Antenna

TRU

& ASSEMBLY

MANUAL

308 Industrial Park Road, Starkville, MS 39759

WARNING:

You can be killed if the antenna,

feedline, or the equipment used to

install the antenna accidentally

contacts utility lines. Never install

an antenna near utilit

lines.

Table of Contents

AV-640

Vertical Antenna

Instruction Manual

Table of Illustrations

Topic Page

Introduction 3

Theor

of Operation 3

AV-640 Specifications 4

Antenna Location 5

Antenna Mast 6

Antenna Groundin

Antenna Guying 6

Customer Supplied Components 6

Tools Required for Assembly 7

Safety Precautions 7

Verification of AV-640 Parts 8

Assembl

Procedure 11

Installation Procedure 16

Tuning Procedure 17

Maintenance 18

Technical Assistance 18

Warranty 30

Illustration Page

Chart A 19

Chart B 19

ure A20

ure B 21

Figure C 22

ure D 23

ure E 24

Figure F 25

ure G 26

ure H 27

Figure I 28

Figure J 29

WARNING: Improper installation and assembly can be hazardous!

Read these instructions thoroughly before attempting to install or

operate this product. High power transmitting devices produce voltages

that can cause severe burns or other injuries.

Introduction

Hy-Gain is proud to deliver the AV-640 Eight Band Vertical. Drawing on our

many years of Amateur Radio HF and VHF antenna design experience, we have

produced a well-engineered antenna capable of maximum efficiency, unmatched

performance, and superior construction.

Computer optimization of the AV-640 design yields the most efficient 3/8

wavelength electrical design with maximum gain and low angle of radiation for

long distance communication. No traps are used to achieve eight band

performance. The AV-640 is resonant on 6, 10, 12, 15 and 17 meters with

individual 3/8 wavelength radiators. The center radiator resonates on 20, 30 and

40 meters using parallel end loaded Teflon wire coils. Capacity hats on these

bands give wide 2:1 VSWR bandwidth and the antenna is kept to a height of 26

feet by the low inductance coils. There are no "tricks" or "mystery resonances"

used for impedance matching on any band.

No long-wire radials or counterpoise kits are necessary for operation of the AV-

640. The AV-640 is self contained for simple, convenient portable or fixed

operation.

Mechanical construction of the AV-640 is designed for extreme light weight and

high wind survival. Aircraft grade 6063-T832 aluminum and high strength

fiberglass are used for the entire radiator. The trap-free design presents a very

low wind surface area. Bulky tubing is not required to support unwieldy traps.

The broad 2:1 VSWR bandwidth on all bands lessens large frequency shifts

seen in other antennas when the antenna is wet or iced.

The AV-640 is covered by our Hy-Gain Warranty and supported by our customer

service team. We would like to thank you for purchasing this product from us and

ask that you let us know of any suggestion you may have. With proper assembly,

installation, and maintenance, your AV-640 will provide years of faithful service.

Theor

of O

eration

The AV-640 HF Multiband Vertical antenna consists of an end fed radiator that is

resonant in the 6, 10, 12, 15, 17, 20, 30 and 40 meter amateur frequency bands.

Resonances on each band are the result of impedance matching a 3/8

wavelength element with a broadband RF transformer. The characteristic

impedance at the base of the 3/8 wavelength radiator is in the order of a few

hundred ohms.

To match this impedance two tools are employed. First a counterpoise of 72"

spokes is mounted at the AV-640 base. The capacitance from this

round plane

helps lower the base impedance. Second, a 4:1 toroidal transformer (voltage

balun) steps the base impedance down to 50 ohms. This transformer uses (2)

ferrite cores for high power capability. Also, the windings are made of twisted

pair wire to improve coupling and reduce loss. A second high power

transformer is configured as a 1:1 current balun to help stop RF from traveling

back on the feedline shield. The radiator of the AV-640 is at DC ground

potential for static drain. This is accomplished by a radio frequency choke in

The center radiator of the AV-640 supports 1/4 wavelength stubs for 6 , 10, 12

and 17 meters. The stubs are placed approximately one tenth of a wavelength

(electrically 1/8 wavelength) above the AV-640 base. At the top of each stub the

impedance is very high at the frequency the stub is tuned. This high impedance

stops, (chokes) RF at this point creating a resonant 3/8 wavelength radiator.

There is minimal loss using this method as compared to standard trap circuits.

Also, VSWR bandwidth is not restricted by the °Q" of trap components. On 15

meters, the center radiator is terminated with a capacity hat to form a 3/8

wavelength radiator. No stub or coil is used on 15 meters. For 20, 30 and 40

meters, a coil and capacity hat are used on each band to create a 3/8

wavelength radiator. The coils are mounted at the top of the center radiator.

These three coils are connected in parallel. Parallel connection separates each

band to allow individual band tuning and has less loss than does series

connection. Also, the AV-640 coils have significantly less loss than a standard

trap because the AV-640 capacity hats exhibit greater capacitance than a

typical trap, therefore, less inductance is required.

AV-640 S

ecifications

VSWR at Resonance: Less than 1.5:1 at antenna typical

Gain: 3 dBi nominal

Hei

ht: 25 ft 10 in

Wei

ht: 22 lbs

Horizontal Radiation Angle: 360 degrees

Vertical Radiation Angle: 16 degrees at 1/4 wavelength high

Wind Surface Area: 2.5 s

Wind Survival: 80 mph

Antenna Location

The best performance for receiving and transmitting will be obtained by mounting the

antenna in a clear location above or away from buildings, buildings, towers, feedlines,

utility wires, and other antennas. While your own ingenuity and particular circumstances

will determine the final mounting method, remember, any object within 75 Set torn the

base of the antenna can influence the performance of the AV-640.

Band (m) 2:1 VSWR

(KHz) CW

(Watts Out) POWER SSB

(PEP Watts) RTTY

(Watts Out)

40 150 1500 1500 500

30 175 1500 1500 500

20 500 1500 1500 500

17 500 1500 1500 500

15 500 1500 1500 500

12 500 1500 1500 500

10 1500 1500 1500 500

6 1500 300 300 100

WARNING: Always mount this antenna so that it is out of the reach

of adults as well as children and pets. The counterpoise rods can

cause injury and or severe RF burns.

•NEVER mount this antenna in a location that will permit

unsuspecting people to come in contact with any part of the

antenna.

•NEVER mount this antenna where a mechanical failure might

allow the antenna, antenna support or feedline to contact power

lines or other utility wires.

•ALWAYS ground the feedline at the point where it enters a

building to a good earth ground for lightning protection.

•ALWAYS follow the guidelines for antenna installations as

recommended by the US Consumer Product Safety Commission.

Antenna Mast

The recommended support mast for the AV-640 is steel water pipe between the sizes of 1-

1/4" OD to 2 1/2" OD and with a length that will place the antenna base at a safe height.

Do not use thin walled conduit, aluminum tubing, or "TV" mast. The AV-640 is designed

to operate at a height of 8 or more feet for proper performance. Placement on the side of a

house or garage at eaves level is acceptable as long as the counterpoise whips will not be in

contact any snow on the roof Placement above metal roofs is acceptable if the antenna

base is at least 5 feet or more above the metal surface.

Antenna Groundin

Although the AV-640 is designed to operate efficiently without the requirement of an earth

ground, SAFETY GROUNDING must still be provided to protect equipment, property

and persons from the hazards of lightning strikes and other weather related electrical

discharges. In addition the coaxial cable feeding the antenna should have the shield

grounded to eliminate the risk of any indoor equipment failure from allowing hazardous

voltages from appearing indoors and creating a shock hazard. The support mast should be

grounded with a large diameter ground wire.

The AV-640 is DC grounded for static discharge. This is accomplished with a choke coil

in the Matching Unit. This coil could fail under high voltage spikes from a near or direct

lightning strike.

Additional protection can be accomplished by grounding the shield of the coax where it

enters the building to a good earth ground or directly burying the cable in the earth for

several feet before it enters the building. The coaxial cable should be totally disconnected

from the station during threatening weather conditions for maximum lightning

protection.

Antenna Gu

For normal operation up to 80 mph winds, the AV-640 will not require guying. For

extreme locations such as tall building rooftops, a safety guy is recommended. Use

Dacron® rope to guy the center radiator. Attach ropes 14 feet above the antenna base.

Use care not to disturb the radiator stubs.

Customer Su

lied Com

onents

• Quality low-loss 50 ohm coax cable with PL-259 connectors

• VSWR Analyzer (MFJ-259B or equiv.) or HF transceiver with VSWR meter

• Mounting mast with required hardware to provide sturdy support

Tools Required For Assembly

• 1/4" Standard Blade Screwdriver • 7/16" Nut Driver

• #1 Phillips Screwdriver • 7/16" Open End Wrench

#2 Phillips Screwdriver • 10 nun Open End Wrench

3/8" Open End Wrench • Tape Measure 20'

3/8" Nut Driver • Safety Glasses

5/16" Nut Driver • Pliers

5/16" Open End Wrench

Safety Precautions

WARNING: You can be killed if the antennas, feedline, or the

equipment used to install the antenna accidentally contacts any utility

lines. Never install an antenna near power lines!

•Be careful while climbing and carrying the antenna. It is heavy

enough to cause you to lose your balance if it is handled too casually

or if any part of the antenna snags on a gutter, ladder, tree, or other

item.

•Mount the antenna high enough and in the clear so that it is out of

reach by any person or pet. Do not allow trees or other structures

near the radiator portion of the antenna. The counterpoise whips can

cause serious eye injury.

•Ensure that the mast is sturdy enough to support the weight of this

antenna including the windload of the antenna.

Verification of Parts

Refer to the Box Contents and Parts Bags listings below to identify all parts. Also refer to

Page 10 for drawings of the various brackets used in the AV-640. If any part is missing

or damaged, turn to the Technical Assistance portion of this manual. There is extra

hardware supplied with the antenna. All hardware is Stainless Steel.

Box Contents

Part Number Part Description ED Number Quantity Received

17-AV640-4 Instruction Manual Bag IM 1

17-AV640-1 Parts Bag #1 PB1 1

17-AV640-2 Parts Bag #2 PB2 1

17-AV640-3 Parts Bag #3 PB3 1

80-AV620-1 AV640 Matching Unit MU 1

810-0620-1 Base Insulator 1 1/4" x 12" IN 1

11-0640-1 AV-640 Coil Assembly L1 1

20-AV640-1 Base Tube 1 1/2" x 12" BA 1

20-AV640-2 Radiator Section 1 1/2" x 72" BB 1

20-AV640-3 Radiator Section 13/8" x 75" BC 1

20-AV640-4 Radiator Section 1 1/4" x 75" BD I

810-0640-9 Radiator Section 5/8" x 36" BE 1

17-AV640-9 Small Tube Bundle ST 1

17-AV640-10 Spoke Bundle BS 1

738-0620 Antenna Mounting Plate AM 1

Small Tube Bundle

Part Number Part Description ID Number Quantity Received

810-0620-21 Stub Section 1/4" x 36" CG 1

810-0620-14 Stub Section 1/4" x 48" CF 1

810-0620-15 Stub Section 1/4" x 72" CE 3

810-0640-16 Stub Section 3/16" x 19" CA 1

810-0640-17 Stub Section 3/16" x 32" CD 1

810-0640-18 Stub Section 3/16" x 34" CC 1

810-0640-19 Stub Section 3/16" x 57" CH 1

758-2764 72" Stainless Steel Whip CW 7

oke Bundle

810-0640-24 1/8" 6" Aluminum Rod SP1 2

810-0640-25 1/8" 12" AluminumRod SP2 4

810-0640-26 1/8" 24" Aluminum Rod SP3 4

810-0640-27 1/8" 36" Aluminum Rod SP4 4

810-0640-28 1/8" 40" Aluminum Rod Spares 2

Parts Ba

Contents

Instruction Manual Ba

Part Number Part Description ID Number Quantity Received

925-AV640 AV-640 Instruction Manual MN . 1

925-0006 H -Gain Warrant Card WC 1

784-1780 Warning Label WL 7

Parts Bag #1

Part Number Part Description ID Number Quanti Received

656-03755 6-32 x 3/8" Screw SS S1 48

656-05005 6-32 x 1/2" Screw SS S2 4

656-12505 6-32 x 1 1/4" Screw SS S4 10

656-1500S 6-32 x 1 1/2" Screw SS S3 6

656-1750S 6-32 x 13/4" Screw SS S5 2

705-0632S-K 6-32 Nut Keps s SS N1 71

660-0375S 10-32 x 3/8" Screw SS S6 8

711-1037S #10 Lock Washer SS W1 4

705-10325 10-32 Nut SS N2 8

705-1032SNL 10-32 Nut Nylon Insert SS N3 8

662-20005 1/4-20 x 2" Bolt SS S8 4

662-25005 1/4-20 x 2 1/2" Bolt SS S9 4

705-2520SNL 1/4-20 Nut Nylon Insert SS N5 8

745-31005 1" Hose Clam SS HC2 1

745-31505 1 1/2" Hose Clam SS HC1 3

810-0620-16 Stub Slice 3/16" x 1 1/2" SS 3

745-3108 Counterpoise Ring SS RI 2

765-1009 Plastic Ca 1/4" C1 3

765-1062 Plastic Ca 5/8" C2 1

Parts Bag #2

Part Number Part Description H) Number Quantity Received

735-1610 Radiator Clam Bracket RB 16

758-9195 Mast Saddle MS 2

808-1786-6 Mast Plate MP 2

Parts Bag #3

Part Number Part Description ID Number Quantity Received

758-9200 2 1/2" U-Bolt Assembly SS UB 2

735-1618 Single Stub Base Bracket SB1 2

735-1611 Dual Stub Base Bracket SB2 1

737-8100 Single Stub Insulator P3 5

738-2600 90 Degree Stub Insulator P1 2

738-2602 180 Degree Stub Insulator P2 2

11-AV620-1 Jumper Wire J1 1

90 Degree Stub Insulator

P/N 738-2600 Qty (2)

Plastic

ID# P1

180 Degree Stub Insulator Single Stub Insulator Dual Stub Base Bracket

P/N 738-2602 Qty (2) P/N 737-8100 Qty (5) P/N 735-1611 Qty (1)

Plastic Plastic Aluminum

ID# P2 ID# P3 ID# SB2

Single Stub Base Bracket Radiator Clamp Bracket

P/N 735-1618 Qty (2) P/N 735-1610 Qty (16)

Aluminum Aluminum

ID# SB1 ID# RB

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