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hy-gaim

©

Model

AV-18VS

308

Industrial

Park

Road

10-80

Meter

Vertical

Antenna

Starkville,

MS

39759

USA.

Ph:

(662)

323-9538

FAX:

(662)

323-6551

INSTRUCTION

MANUAL

General

The

Hy-Gain

Model

18V-S

is

a

trapless,

vertical

antenna

which

is

manually

tuned

Description

to

any

band,

10

thru

80

meters,

by

a

simple

adjustment

of

the

feed

point

on

the

base

inductor.

It

is

designed

to

be

fed

with

50

ohm

coax,

and

works

efficiently

for

DX

or

local

contacts.

It

now

features

stainless

steel

hardware

for

all

electrical

and

most

mechanical

connections.

The

antenna

is

self-supporting

and

can

survive

winds

in

excess

of

80

mph.

It

is

highly

portable

and

knocks

down

to

an

overall

length

of

5

feet.

WARNING

When

installing

your

system,

take

extreme

care

to

avoid

any

accidental

contact

with

power

lines

or

overhead

}

obstructions.

Failure

to

exercise

this

care

could

result

in

|

serious

or

fatal

injury.

Feedline

Use

50

ohm

coaxial

cable

(RG-213/u

preferably)

and

attach

to

the

antenna

as

shown

in

Figures

2,

5

and

7.

After

attaching

the

coax,

seal

it

from

moisture

using

Coax-Seal®

or

some

similar

substance.

:

.

{

é

a

|

AO

-1935-B-003

15

ea

-

MOUNT

BASE

INSULATOR

12

(FITS

DOWN

AND

INSIDE

WITH

HOLE

TO

THE

SIDE,

OF

ITEM

10)

AS

SHOWN

we

et

Item

Koy

—_

No.

Description

ae

pase

Blaeret

11

(FITS

OVER

ITEM

12

AND

fos)

™~

bp

a

ee

|

10

THROUGH

THE

TOP

PLATE

OF

nauctor

insulator

|

_/

THE

BASE

BRACKET,

ITEM

6)

g-—

16

12

Insulator

ae

15

Bolt,

#10-24

x

1",

hex

head

|

|.

24

#10

SOLDER

LUG

ATTACHED

17

16

Lockwasher,

#10,

internal

rT

<

TO

COAX

BRAID

(WRAP

BRAID

17

Nut,

#10-24,

hex

me

“WITH

TAPE

TO

WEATHERPROOF

24

Solder

Lug,

#10

ring

Figure

1

27

Base

Insulator

17

®

Figure

2

Coax-Seal®

is

a

registered

trademark

of

Universal

Electronics,

Inc.

i

Revision

‘1.0

Assembly

Select

the

base

bracket

and

the

lower

base

insulator

and

install

as

shown

in

Figure

1.

Select

the

two

upper

base

insulators

and

the

base

inductor

insulator

strap

and

install

as

shown

in

Figure

2.

NOTE:

Coax

braid

must

also

be

installed

as

shown.

AQ-1938-C-O001

we

item

No.

Description

1

Tube,

aluminum,

M1,

1%”

x

9”

2

Tube,

aluminum,

M2,

7/8"

x

53%"

5

3

Tube,

aluminum,

M3,

3/4”

x

53%"

ae

4

Tube,

aluminum,

M4,

5/8"

x

5314”

5

Tube,

aluminum,

M5,

7/16"

x

54”

AS)

Caplug,

7/16",

black

18

(not

used)

14

Screw,

#10-24

x

3/8”,

hex

head

ne

28

#4

Hose

clamp

<

:

29

#6

Hose

clamp

30

#10

Hose

clamp

Section

M2

has

a

hole

drilled

through

ae

both

walls,

near

each

end.

the

end

with

the

hole

114”

from

the

end

fits

inside

NOTE:

THIS

ILLUSTRATION

IS

section

M1.

IN

SCALE

IN

LENGTH

ONLY;

NOT

IN

WIDTH,

dl.

wv

NN

RADIAL

WIRES;

IF

REQUIRED

i

\Us!

ee

\

Figure

3

\

Z

20%

Select

the

M1

section

of

tubing

(14")

and

place

it

over

the

top

of

the

lower

base

insulator.

Align

the

hole

in

the

base

of

the

M1

section

of

tubing

with

the

hole

in

the

lower

base

insulator

as

shown

in

Figure

3.

Place

a

#10

(Item

14)

screwin

the

hole

and

tighten

securely.

Select

the

M2

section

(%"

x

53%")

and

slip

the

smail

hole

end

through

the

two

upper

insulators

(see

Figure

2)

intothe

M1

section.

Fasten

with

#10

hose

clamp

(item

30)

as

shown

in

Figure

3.

Description

Inductor

Coil

Clamp,

7/8"

Bolt,

1/4"-20

x 1”,

hex

head

Lockwasher,

1/4",

internal

Nut,

1/4”-20,

hex

U-Bolt,

5/16”

x

1%”

x

2%"

Lockwasher,

5/16",

split

Nut,

5/16"-18,

hex

Inductor

Clip

Assembly

MAST

(not

supplied)

AQ

-

1938

-C-005

19

(20

26

COAXIAL

CABLE

(not

supplied)

AN

J

OONN

GROUND

WIRE

(not

supplied)

ATTACHED

21

TO

U-BOLT

@

tp

/

|S

Aa

oh

Wal

:

we

YAN,

i

Ai

Kap

NZ)

AY

(A

Bs

~

Figure

4

me

Operation

Select

the

M3

section

(%"

x

53%")

and

slip

the

end

with

the

smallest

hole

into

the

M2

section

and

fasten

with

#6

hose

clamp

(item29).

Select

the

M4

section

(%"

x

53%")

and

slip

the

end

with

the

smallest

hole

into

the

M3

section

and

fasten

with

#6

hose

clamp

(item

29).

Select

the

M5

section

(/1s"

x

54”)

and

slip

the

slotted

end

into

M4

section.

Fasten

with

#4

hose

clamp

(item

28).

|

Place

a

7/16"

caplug

on

the

end

of

the

antenna.

Now

select

the

base

inductor

coll,

me

tuning

clip

and

the

short

length

of

wire.

Install

as

shown

in

Figure

4.

NOTE:

Coax

center

conductor

must

also

be

connected

as

shown

in

Figure

4.

Attach

the

top

lead

of

the

base

inductor

coil

to

the

M2

section

(just

above

the

M1

section)

as

shown

in

Figure

4.

Attach

the

coax

to

your

transmitter.

Attach

the

tuning

clip

to

the

base

inductor

and

tighten

it

securely.

The

chart

shows

an

approximate

setting.

When

counting

the

turns,

count

from

the

top-of

the

coil.

The

unused

turns

below

the

clip

are

automatically

shorted

out

to

allow

you

to

operate

the

antenna

at

full,

legal

power

output

without

overheating

the

base

inductor

with

RF

energy.

The

chart

on

this

page

should

be

reasonably

close,

but

due

to

different

mounting

locations,

different

soil

conductivity,

and

other

variations

in

your

individual

installation,

the

exact

match

is

best

determined

by

using

an

SWR

bridge

with

your

transmitter

and

tapping

for

lowest

SWR.

The

figures

shown

in

the

chart

are

for

ground

mounting

only.

Due

to

the

variations

in

the

length

of

the

ground

wire,

it

is

impossible

to

provide

a

chart

for

elevated

mounting.

NOTE:

Count

all

turns

indicated

below

as

complete

turns

of

the

coil

from

the

top.

NONE

indicates

attachment

of

tuning

clip

above

turns

of

coil.

cae

10

Meter

15

Meter

|

20

Meter

|

30

Meter

|

40

Meter

|

80

Meter

ae

NONE NONE

a

ev

NONE

NONE

272

NOTE:

Connect

tuning

clip

right

at

clamp

connection

on

the

M2

section

when

number

of

turns

indicated

is

NONE.

Ground

Mounting

Drive

a

3

foot

piece

of

pipe

(such

as

1%”

plumbers

pipe)

into

the

ground

and

attach

the

antenna

as

shown

in

Figure

4.

Drive

an

8

foot

copper-clad

steel

ground

rod

into

the

ground.

Attach

the

ground

rod

to

the

base

using

#10

wire.

Remember,

a

vertical

antenna

is

only

as

good

as

the

ground

system

it

is

working

over.

The

better

the

ground

system,

the

better

your

antenna

will

work.

If

difficulty

is

experienced,

try

adding

2

or

3

more

ground

rods

about

the

antenna

base

and

attach

each

with

a

separate

wire.

Radials

may

be

attached

to

the

ground

rods

for

increased

efficiency.

Elevated

Mounting

The

Model

18V-S

can

be

mounted

alongside

the

house

on

a

short

mast

or

ontop

of

the

roof

using

a

short

mast

section.

When

mounting

more

than

24”

above

the

ground,

you

must

use

a

radial

system

similar

to

that

shown

in

Figure

5.

This

radial

system

should

then

be

grounded

to

an

earth

ground

by

the

shortest

path

possible.

Do

not

change

the

mounting

point

of

the

base

inductor.

Mount

it

only

as

shown

in

this

manual.

CAUTION

Make

certain

none

of

the

radial

wires

touch

the

inductor

coil

or

damage

to

your

transmitter

or

antenna

could

occur.

AO-193S

~A-004

AQ-193S-A-006

RADIAL

WIRES

(ARRANGE

AT

90°

INTERVALS)

GROUND

ROD

(CONNECT

TO

8’

GROUND

ROD

BY

SHORTEST

PATH

POSSIBLE.)

/

Figure

5

Figure

6

Method

of

Attaching

Radial

Wires

to

Base

Minimum

Radial

Configuration

Radials

Item

No.

The

radials

can

be

constructed

of

either

copper

or

aluminum

wire.

The

recommended

method

of

installing

the

radials

is

to

attach

them

to

the

screws

at

the

bottom

of

the

base

assembly.

The

33

foot

dimension

is

measured

from

the

base

assembly

to

the

strain

insulator,

and

is

optimum

for

40

meter

operation

only.

You

may

wish

to

add

shorter

or

longer

radials

for

other

bands

that

you

plan

to

operate

on.

WARNING

The

antenna

and

radials

are

“hot

with

RF”

proportional

to

|

the

operating

power.

Be

sure

to

keep

out

of

the

reach

of

small

children

and

pets.

Part

No.

177963

173276

173274

173273

173272

160043

723267

872000

169339

455644

463056

478002

515852

526472

504069

565697

554071

502958

562961

554099

543792

564792

555747

678922

872817

877961

745-3104S

_

745-3106S

745-3110S

PARTS

LIST

Description

Tube,

aluminum,

M1,

1%"

x

QU

oo

ce

cc

ee

eee

Tube:

aluminum,

M28"

X5S

2"

sscaees

sAewasdda

Sead wane

een

Tube,

aluminum,

M3,

%4"

x

53¥"

ooo.

ee

cee

gige

barat

ae

as

Tube,

aluminum,

M4,

5%"

x

53"

ooo

cc

cc

ee

ee

ee

eens

‘Tube,

alominum,MS:

ie

54.5

ce

vue

tae

ee

eebeaesaee

wal

Bracket,

base

Coil,

inductor

PNG

O

3

ules

ack

aad

wed

wntgeg

eet

cum

a

aigentia

tet

eee

natn

seu

Ge

G

Screw,

#8

x

2",

pan

head,

Type

A,

slotted

............0...

Screw,

#10-24

x

%",

hex

head,

slotted................000-

Bolt,

#10-24

x

1",

hex

head

.....

0...

cece

wee

cece

ewes

Lockwasher,

#10,

internal

......

00.0.0...

cece

cee

eee

enue

Nite

10224

Nex

earwdenwinkadicutuaies

Sawa

Ske

ey

eau

Che

Bolt,

4-20:

&

1

RexX

Nead

2.486

jets

Gath

bw

nee

Oe

ed

eke

Lockwasher,

“4”,

internal

....

0.0...

cee

ccc

eee

ee

eet

ee

aes

NU

Sa

20

OR

28.2

3

hs

ea

uiboited

Bin

nine

AM

ee

eons

WEEDON

ie

ee

Kea

tcc

e

oe

i

artewe

tend

sak

Ou

Lockwashet.

776:

Split

cat

Gees

caw

ed

aeinonan

sate

auw

bene

Nut,

S/ig-18,

DVSX

dah

Bencccee

dias

eleateneniet

ed

adh

Bile

ees

ft

eae

sen

tag’

Solder

luge

#0

FING

ce

h5

aad

en

eee

aa

Nee

ae

kaeleten

wens

(Not

Used)

INGUCTOR

Clip

aSSEMDIY

s.255

ea

econ

nana

peCawadebewaew

on

WSHIALOL

DAS

Orisa

yas

cake

LES

a

rd

ch

emntncu

enn

ceri

Alay

ls

HAY

HIOS@

Claliip

(358790)

tee

esherneh

ation

ee

unneleee

a

tmtaealn

#6

Hose

clamp

(358756)

oo....ccccccccceccccsecerseeeetseetteeeneenseens

#10

Flos:

Clapit

(358797)

rcsieinda

ecu

manonrateadatetutonen

eS

SY

Co

Parts

Pack

18V-S,

Stainless

Steel

CS

TANT

sectarta

a

ae

etcetera

Shea

ast

a

tn

ley

Nie

Se

roe

epee

eek

1

CapluO,

ie

A

OlACK)

%

sures

cate

eke

det

ire

ae

ie

ye

PIS

UALOR

PPO

wate

td

cok

tawa

is

nae

ate

wero

we

dadeaat

betula

ae

2

ADDENDUM

PHASED

MULTI-BAND

VERTICALS

for

ADDITIONAL

GAIN

and

LOW

ANGLE

RADIATION

Pe

<=

screen

th

eth

et

hee

SS

ee

AV-18HT

AV-18VS/18AVT

AV-14AVQ

AV-12AVQ

The

following

Hy-Gain

verticals

are

well

adapted

for

the

phasing

arrangements

shown

in

this

reports.

MODEL

18HT-S

HY-TOWER

The

18HT-S

is

a

multi-band

vertical

antenna

with

automatic

band

selection

of

10-80

meters

by

means

of

a

unique

stub

decoupling

system.

The

Hy-Tower

with

a

base

loading

coil

operates

efficiently

on

160

meters.

The

system

is

foolproof,

fed

directly

with

a

single

50

ohm

coax.

No

guys

are

required

for

the

24

feet

high,

self-supporting

tower.

The

top

mast

extends

the

height

to

50

feet.

Two

units

make

an

ideal

phased

array.

MODEL

I8AVT/WB-S

VERTICAL

The

18AVT/WB-S

is

a

multi-band

trap

vertical

for

10

through

80

meters.

It

is

completely

fac-

tory

pre-tuned

and

exhibits

an

extremely

low

angle

DX

radiation

pattern.

It

is

easy

to

as-

semble,

light

weight

which

one

man

can

install.

A

single

50

ohm

coaxial

feedline

is

required.

Two

or

three

13AVT/WB-S’s

make

an

excellent

phased

array.

MODEL

14AVQ/WB-S

VERTICAL

The

14AVQ/WB-S

is

a

self

supporting

multi-

band

trap

vertical

for

10

through

40

meters

and

is

completely

factory

pre-tuned.

It

is

the

world’s

most

popular

ham

antenna

with

an

overall

height

of

19

feet.

The

antenna

is

thoroughly

weatherproofed

and

has

a

low

angle

DX

radiation

pattern.

It

may

be

ground

mounted

or

installed

on

"Roof

Top"

with

a

radial

system.

MODEL

12AVQ

VERTICAL

The

12AVQ

is

a

self

supporting

13

1/2

foot

multi-band

trap

vertical

for

10,

15

and

20

meters.

Completely

factory

pre-tuned

with

SWR

of

2:1

or

less

with

a

low

angle

DX

radia-

tion

pattern.

The

antenna

has

a

new

fiberglass

impregnated

styron

base

insulator.

It

may

be

ground

mounted

with

earth

acting

as

the

"image

antenna”

or

installed

on

the

roof

using

a

radial

system.

icieased

suiviea

on

.

80

apa

40

meters

iiss

created

a

need

for

an

antenna

with

power

gain

and

directivity.

Doublet

and

long

wire

antennas

are

no

longer

effective

due

to

increased

QRM.

At

these

low

frequencies,

the

radiation

system

must

be

lengthy

and

height

above

ground

is

ex-

tremely

important

to

obtain

the

"low"

angle

of

radiation

needed

for

DX.

Beams

are

excellent,

but

require

a

large

sup-

porting

tower

and

"hefty"

rotating

system.

Inverted

V

dipoles

and

slopers

require

a

large

tower

and

plenty

of

property.

The

vertical

"phased

array",

the

answer

for

"DX"

on

these

frequencies

combine

gain,

directivity

and

low

angle

radiation,

the

three

most

impor-

tant

DX

factors

in

a

communication

installation.

The

vertical

is

well

known

for

its

low

angle

characteristics.

When

you

combine

two

identical

verticals,

properly

spaced

and

phased,

the

resultant

is

a

concentrated

low

angle

of

energy

and

a

power

gain.

These

anten-

nas

can

be

so

arranged

to

give

a

definite

effect

on

either

one

or

two

favorite

bands

or

all

band

coverage

with

some

pattern

compromise

and

slight

loss

of

gain.

The

following

data

was

experimentally

derived

on

the

Telex/Hy-Gain

test

range.

Due

to

the

many

factors

that

vary

and

influence

the

perfor-

mance

of

an

antenna,

such

as

grounding

and

close

proximity

of

surrounding

objects,

etc.,

Telex/Hy-Gain

cannot

guarantee

an

installation

to

perform

or

exhibit

the

same

characteristics

as

outlined

in

this

report.

However,

many

Amateurs

are

now

successfully

using

these

ar-

rangements.

Commercial

broadcast

stations

have

been

using

a

similar

phasing

arrangement

for

years.

BI-DIRECTIONAL

ARRA

(Four

Quadrants)

Two

identical

vertical

antennas

can

be

installed

as

a

phased

array.

When

excited

by

RF

energy,

gain

is

achieved

by

control

of

the

directional

pattern.

This

direction

pattern

control

results

in

added

gain

by

sharpening

lobe

patterns

and

concentrating

the

radiated

energy

at

very

low

angles.

Signal

flutter

is

reduced

and

reception

is

vastly

improved.

Phased

arrays

will

reduce

installation

height

re-

quirements

and

still

maintain

low

angle

radiation.

Most

effective

spacing

for

a

bi-directional

array

is

1/2

wave

length.

When

two

verticals

are

ex-

cited

in

phase

the

radiation

is

broadside

to

the

plane

of

the

verticals,

offering

substantial

gain

and

bi-directional

characteristics.

Side

nulls

offer

excellent

signal

cancellation

to

the

un-

desired

direction.

°

Y

“BROADSIDE”

GAIN

3.86

dB

When

excited

"out

of

phase"

these

same

verti-

cals

can

be

made

to

give

an

"end

fire”

or

bi-directional

pattern

in

the

opposite

direction

through

the

plane

of

the

verticals.

This

then

nulls

out

signals

in

the

opposite

directions.

More

gain

is

exhibited

by

the

broadside

pattern

over

the

"end

fire"

arrangement,

but

the

"end

fire"

arrangement

offers

a

wider

frontal

pattern.

Both

arrangements

offer

an

excellent

ad-

vantage

over

a

single

vertical

since

either

phasing

combination

exhibits

noticeable

signal

gain

with

side

attenuation

of

undesired

signals.

This

added

gain

and

low

angle

vertical

direc-

tivity

is

the

advantage

of

the

phased

array.

TRANSMITTER

When

feedline

"A"

is

the

same

length

as

feedline

"B"

the

cur-

rents

arrive

at

the

base

of

each

antenna

at

the

same

time,

giving

the

"inphase"

broadside

pattern.

“ENDFIRE”

GAIN

2.3

dB

Phased

verticals

may

be

spaced

either

one

quarter

wave

or

one

half

wave

depending

upon

gain

and

directional

characteristics.

The

nulls

of

the

phased

array

are

extremely

sharp

and

very

pronounced.

‘Typical

arrangements

of

phased

arrays

and

their

electrical

specifications

are

illustrated

below.

TRANSMITTER

|

When

feedline

"A"

is

1/2"

wave

length

shorter

than

feediine

"B"

the

current

arrives

at

antenna

"X"

1/2

wave

length

sooner

(180

degrees)

than

at

antenna

"Y"

giving

the

"out

of

phase"

end

fire

pattern.

i

66FT.

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COAX

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POLYFOAM

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COAX

Wi

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a

LW

)

a

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as

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50

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TRANSMISSION

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TYPE,

ANY

LENGTH

POLYFOAM

50

OHM

COAX,

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DPDT

SWITCH:

POSITION

1

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BROADSIDE

POSITION

2

-

ENDFIRE

Figure

2.

Typical

Installation

Phased

(2)

18

HT

40

Meters

7200

KHz

Design

Frequency

-

10-