Hy-Gain TH3-MK3 Thunderbird Instruction Manual

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General

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DIVISION

OF TELEX

COMMUNICATIONS, INC.

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MANUAL

The

DescrlPllon

Hy-Gain

10, 15

on
Hy-Q

traps.

with

a heavy

Inputimpedance.

Gain.

Front-to-backratio
Maximum

VSWR

Lightning

B::il:l#$";

Longest
Maxrmum wino

Net

weignt.

Accepts

Wind

surface

Wind

load

TH3-Mk3

and

20 meters. Multi-barlding is

The

antenna is desig$ed to fit

duty TV

power

(at

resonance)...

protection

input

::::::::::::::g::::::::::::::::::::

element

survivat.......&....

mast.

. .i.Fr, . .

area

mph

at B0

S6OlrNortheast
Telephone:

EUFIOPE: 22,
93200 Saint-Denis
Tdldohone:

ORDER

TH3.
3-Element, Ham Antenna

.Et

4i

MK3

Highway

467-5321 telex: Hygain

t4O?,

rue

de la Ldgiond'Honneur

-

820.98.46

France

NO.

THUNDERBIRD

6 . Lincoln,

Telcodi

telex:

Nebraska

630013

388

68505 U.S.A.
48-4324

Lcn a

PN 801235

s

is a three-d.iement

rotator.

F

:

t

"r

$

:.....$.........

..::::::.::f::::::::::::::::::::::::::::::::::;;it,i?"l*tr

.....ft.:

. .i....

... ....t

....

t:

f

f;n
l;

tri-band beam antenna

accomplished through

(41

a 1s/e"

Ebctricat

Mechanical

mm) O.D. mast

designed for operation

the use of Hy-Gain's

and can

be

....25d8

.....

DC

all

rotated

1 kw AM

ground

'11,11?3,Til1

:::::::::::

.....:.9....

.......}]

...#.

..r...

.11A" lo 2V2"

....2i

.... 100 mph

(32

O.D.

...5.10 sq.

(823.7

ft.

(160.93

mm

ft.

kmph)

-

64 mm)

(0.474m2)

cm)

(.r

FOR
measurement Please
hardware and

Preparation
ol Assembly

OVERSEAS

OUR

CUSTOMERS:

the last

see

components supplied with

The

antenna site should

wARNtNc

When Installtng
overhead

fatal

There

are

Method
using a block and tackle

Method
lower and

All tubing
accurately
antenna.

page

tnlury.

two methods

1 - Completely

-

Assemble

2

assemble

supplied

as

The

of this manualSassistance

your

powerllnes.

the

in the

with

the TH3-Mk3

possible

using

*

{-r\i

UnitedSates

prodbct

this

.

Oe treeiOt large

'

i1

system,

Fatture to

of installing

assemble

as shown

antenna
boom-to-mast bracket

lhe

uses En0lish

:i'..

;:i

buildings, metal

'',-'

take

extreme cara to

exerclse thls

the TH3-Mk3

the

antenna

in

Figure 1.

on

given

ground

the

telescopes

dimensions

units of

in identifying

on the

-.

the

care could

at the top

ground

_

in

halves,

on the tower

together. Make

gain

to

objects

avold any contact wlth

of

then hoist

optimum results from

powertines.

or

ln

result

your

tower.

hoist it into

then

as

shown

all measurements as

serlous or

half

each

in Figure

position

up the

2.

your

n

When

Installlng
extreme
overhead
thls carc

lnlury.

WARNING

your

to avold any contact

care

powerllnes.

could

Falture

resull ln

system,

exerclse

to

serlous

or

take

wlth
latal

A0-0388-C-OO2

.

.,"

,t,,1..'"""*-

.,.,

Assembly

Boom

the

ol

Figure

1

CAUTION

When unpacking

insulators, smalter

sometimes

Select
drilled

internaf

and
screws,

put

inside larger

boom-to:bracket

the

two boom

oi the

ends

lockwashers.

lockwashers

and

nuts,

:

dDoule,

@

your

antenna,

tubing,

Secure

(D

etc.).

pieces.

parts (items

clamp

sections

the boom

provided.

@

check

To

conserve

(item

8) using

See

@

inside of all

the

space,

3). Loosely

2 and

the1A"'20

the bracket

to

Figure 3.

('

\g

Flgure

using

ao-0388-8-OlJ

,<

2

tubing

these

assemble

3/a"

x

bolts and

the two

parts

for

smaller

sh.a"-18x23/0"

(clamps,

articles

are

them on the

7a" nuts

the

$r

Flgure 3

-2-

the

Select
mast
and the

cast aluminum

bracket

s/ro"

nuts
and 5. Do not
mount

the

antenna

boom-to-mast bracket

with the holes

and split

tighten

to the

lockwashers

the

screws at this time.

mast.

in

the

boom-to-bracket

to

(item

clamp.

join

the bracket and

The

bracket

1). Align the holes in the boom-to­Us:e the

the clamp.

must

be

s/

'a"-18 x 5"

loose

to enable

See

screws

Figures

you

4

to

NOTE: The

boom-to-mast brackets have a hole

to the mast with the

an11

is

not

weather

hole

/32"

possible,

be drilled at the desired mast

the

conditions.

tr-18 r 5' 8oLT. LocKwasHEn ail

(tr9tcot

Figure 4

5

/ rc"-18

clamp

4

Dtocaa )

BOOM.TO.MAST

BRACKET

thrcugh

x31/2" bolt. lt is recommended

position,

clamp

will

hold

tur

position

its

on the mast in all

their

centers to allow securing

that the mast

removed and

be

then reinstallthe mast.

but the

t^-@o.c-o2t

most severe

AO-0388-B-014

lf

this

-a-6

$.-rBr!h'!olt,
LOCIWASXER od XUT
(O9lloml

d 16.

tro&cta,

3Yt' 3o!T,

1.-[r
locxwlsaEn.nd NUT

(

ploc..

Irplcol 2

t

Alutttlx

casT

ARACKETS

-

?6-18r2t'

-@-o,li

CASTING

IAST

Figure

-TO.8OOT

(Suppli.d

5

rcLr,

LocKwAsrER o.d

--H

CLAilP

!r

curroil..l

BOOX-TO'SRACXET CLAIP

L-

k-zo'1,'eorr.

NUT

LocKw sHER od rur

(

4

ltplccl

,locat

)

-3-

Element-to-Boom
Brackels

Select
nuts

as shown

the element-to-boom

in Figure

brackets

6.

and

insert

lhe

%"-20

xVe"

anchot screws and

1A"

MVEN

t$:

ELEMENT

ORIVET €L€IEf,'

If,SULATOR

DETAIL

ELEMENT

TO

BRACKET

Figure 6

Lciosely assemble the larger
the boom.
Driven Element

Loosely
end of

assemble

the

Loosely assemble the
opposite end of

them toward

Slide

(DE).

This will

boom.

the

the

smaller element-to-boom brackets

be

remaining

boom. This will be for the Director Element.

REFLECTOR-

EOOM

element-to-boom brackets

lhe boom-to-mast

for

Reflector

the

pair

of element-to-boom brackets and slip them overthe

DIRECTOR

and

bracket.

element.

DETAIL

place

them

over one end of

This will

and

See

be the bracket for the

slip them over the same

Figure 7.

AO-O3E8-C-0t5

e

DO

NOT TIGHTEN

EOLTS

UIITIL

(8

REOUIREO

IVEII

ELEIIENT ERACKET

REFLECTOR

to

Boot

Q

Figure 7

THESE

LATER

PER ERACKETI

ELETEI{T ERACKET

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BRA.KET

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