Hy-Gain TAILTWISTER T-2X User manual

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1

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1

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=S

®

308

Industrial

Park

Road

Starkville,

MS

39759

USA_

Ph:

(662)

323-9538

FAX:

(662)

323-6551

T-2X

/

T-2XX

TAILTWISTER™

Rotator

T-2X

has

110

VAC

Controller

T-2XX

has

220

VAC

Controller

|

INSTRUCTION

MANUAL

|

GENERAL

DESCRIPTION

The

Tailtwister

rotator

consists

of

an

extra

heavy

duty

rotator

and

the

control

unit.

The

rotator

is

designed

to

be mounted

on

a

plate

inside

a

tower.

A

mast

to

support

and

tum

large

communications

beams

is

then

attached

to

the

top

of

the

rotator.

However,

in

some

instances,

mast

mounting

is

desired.

The

Lower

Mast

Support

Kit,

PN

5146710,

contains

a

lower

mast

support

and

the

necessary

hardware

to

facilitate

mounting

the

Tailt-

wister

rotator

on

top

of

a

mast.

New

features

in

the

Tailtwister

include

an

8

pin

Cinch®

connector

on

the

rear

panel

of

the

control,

a

chassis

ground

connection

on

the

120

VAC

model,

a

high-strength

drive

gear,

a

weather

proof

AMP

connector

at

the

rotor

unit,

and

RF

beads

on

the

potentiometer

lines.

Cinch™

a

Division

of

Labinal

Components

&

Systems,

Inc.

The

rotator

unit

must

be

wired

to

the

control

unit

with

an

8-wire

cable.

The

control

unit

must

be

placed

inside

the

house

or

other

protected

location.

Included

in

the

shipping

box

are:

.

Instruction

Manual

.

Rotator

Unit

.

Controller

Unit

.

Mounting

Hardware

Pack

.

Connector

Parts

Pack

SAR

>

Due

to

the

wide

variety

of

towers

available,

each

installation

will

have

different

requirements.

The

gauge

of

the

8-wire

cable

to

connect

the

control

unit

to

the

rotator

depends

upon

the

distance

between

the

rotator

and

control.

The

longer

the

distance,

the

larger

the

diameter

of

the

wire

required.

Various

antennas

or

beams

require

different

installation

methods.

(See

Table

1).

Figure

1

Control

Unit

-

Front

Panel

SPECIFICATIONS

;

120

VAC

50/60

Hz

IMIOLON

Bi

disc

eccinguins

tiesisecsanm

sesame

rod

pesgecoman

ents

01

i;

VAC

2.

25

Aaa:

capacitor

start,

capacitor

run

_

Brake

Solenoid

24

VAC,

5.0

Amps

120

VAC/26

VAC

10%

duty,

thermal

switch

protected

-

220

VAC/26

VAC

10%

duty;

thermal

switch

protected

120

VAC/13

VAC

continuous

duty:

:

Mt

..

220

VAC/I3

VAC

continuous

duty

Meter:

DC

voltineter!

155

sie

1000

ohins/volts,

IMA

fall

scale

yy

Méter

Scale

pasa

tten

erences

Optional

......

atl

ame

Pras

enaitans

Say

cae

Direct

aa

South

ented

5°

increments

Maximum

Antenna

Size:

3400ft.

Ib.

(470

Kg.

m)

10

square

feet

(.93

m2

or

sq.

m)

of

wind

surface

area

Operational

Temperature

Range

-30°F

to

+210°F

(-34°C

to

+99°C)

Maximum

Interconnect

Cable

Resistance:

A.

Pins

|

and

2

45-60

seconds

with

60

Hz

input

Brake

wwnityivcanen

Shalini

berernrceranaitnt

1.

positive,

electrically

operated

wedge;

60

segments

spaced

6°

apart”

9

inches

(23.7)

maximum

diameter

by

14.07

inchés

(35.7

cm)

high

1

7/8

to

21/16"

O.D.

(48-52

mm)

Mounting

Hardware

Stainless

steel

hardware

and

plated

steel

clamp

plate

Control

Unit

Size

8.5

inches

(21.6

cm)

wide

x

9.0

inches

(22.8

cm)

deep

x

4.3

inches

(11.0

cm)

high

Shipping

Volume

2,280

cubic

inches

(37,350

ccms)

Shipping

Weight

28

pounds

(12.7

kg)

“Effective

moment

is

defined

as

the

product

of

antenna

weight

and

tuming

radius

and

is

more

accurate

when:

-

selecting

a

rototor

fora

particular

antenna

array.

CAUTIONS

©

Install

properly

and

safely

¢

Towers,

often

the

highest

metal

parts

in

the

vicinity,

require

caution

during

erection

and

placement.

Extreme

care

must

be

taken

during

erection

so

that

metal

towers

and

beams

do

not

contact

power

lines

even

if

the

beams

slip

or

rotate,

towers

fall

or

fracture

or

metal

wires

blow

in

the

wind,

etc.

@

Metal

towers

or

other

position

mechanisms

must

be

placed

so

that

if

they

fracture

or

blow

over

in

high

winds,

they

cannot

contact

power

lines,

be

a

hazard

to

individuals,

or

endanger

property.

e

When

not

mounted

within

a

tower

with

a

thrust

bearing,

as

shown

in

Figures

6

and

7,

the

rotator

must

be

DERATED.

e

Metal

towers

must

be

grounded

properly

at

the

tower

location

before

the

tower

is

erected.

This

is

to

minimize

electrical

hazard

and

the

possibility

of

lightning

damage.

DO

NOT

bury

bare

aluminum

wires

or

stakes

in

the

ground.

Use

copper

ground

stakes.

The

service

entrance

ground

should

be

checked.

The

household

convenience

outlet

should

be

the

3-prong

type

(grounded

back

to

the

service

entrance).

e

The

Control

Box

is

not

weatherproof

and

must

be

located

in

the

house,

ham

shack

or

other

protected

location.

_.

e

Read

this

manual

completely

before

proceeding.

The

Tailtwister

rotator

has

been

carefully

designed

and

manufactured

to

give

many

years

of

trouble-free

service

when

carefully

and

professionally

installed.

It

consists

of

the

strongest

and

best

commercially

available

components.

TYPES

OF

INSTALLATION

There

are

three

general

types

of

installations

(see

Figures

4,

5

and

6).

1.

The

recommended

Installation

is

an

“Inside”

Tower

Mount

with

a

thrust

bushing

or

bearing

to

provide

support

and

resist

high

wind

loads.

When

the

rotator

is

properly

mounted

this

way,

it

can

be

rotated

to

turn

an

antenna

or

beam

of

20

square

feet

(1.86

m2)

wind

surface

area.

The

wind

loading

during

storms,

the

rotational

inertia

of

the

beam

and

unbalanced

weight

are

more

important

than

the

dead

weight

of

the

beam.

It

is

important

to

minimize

the

height

of

the

beam

above

the

rotator

to

minimize

the

overtuming

force

induced

in

a

high

wind

(see

“Unbalanced

Weight”

and

“Wind

Pressure”).

An

“outside”

Tower

Mount

(see

Figure

6)

is

optional.

The

rotator

is

not

well

protected

but

the

installation

is

simpler.

With

an

“Outside”-

Tower

Mount,

the

rotator

must

be

derated

to

10

square

feet

(.93

m2).

.

A

telescoping

or

other

type

mast

(see

Figure

7)

can

also

be

used.

This

installation

is

similar

to

Number

2

above

and

requires

the

optional

Heavy

Duty

Lower

Mast

Support

Kit

and

must

be

derated

to

10

square

feet

(.93

m2).

UNBALANCED

WEIGHT

AND

WIND

PRESSURE

1.

Unbalanced

Weight:

Weight

should

be

as

closely

balanced

as

possible.Unbalanced

weight

creates

a

bending

moment

of

force

which

is

concentrated

on

the

mast

at

the

point

where

it

is

clamped

to

the

rotator.

This

moment

tends

to

strain

the

mast

at

that

point

and

also

to

bind

the

ball

bearings

by

creating

excessive

downward

pressure

on

one

side

and

upward

pressure

on

the

other.

Such

unbalance

places

additional

stress

on

the

motor

gear

train.

Unbal-

anced

weight

becomes

critical

as

the

distance

from

the

antenna

boom

to

the

clamping

point

at

the

rotator

is

increased.

Wind

Pressure:

Wind

pressure

against

the:

boom

and

elements

produces

a

bending

force

on

the

mast

which

can

cause

the

same

stresses

as

unbalanced

weight.

To

strengthen

the

instal-

lation

to

withstand

unbalanced

weight

and

wind

pressure

the

top

mast

should

be

as

short

and

as

strong

as

possible.

In

multiple

arrays

the

an-

tenna

with

the

most

wind

area

should

be

closest

to

the

rotator.

In

order

to

distribute

the

bending

stress

and

prevent

fracture

of

the

mast,

the

T2X

rotator

includes

a

specially

designed

steel

clamping

plate

to

clamp

the

mast

to

the

rotator;

After

procuring

the

type

of

tower

or

other

position-

ing

mechanism

of

the

owner’s

choice,

the

next

step

is

to

wire

the

rotator

to

the

control

box

and

check

out

its

operation

prior

to

installation.

WIRING

AND

CHECK-OUT

A.

Decide

the

wire

gauge

(size)

required

and

pro-

cure

the

number

of

feet

of

the

proper

cable

(see

Table

1).

E.

Turn

the

power

switch

on.

The

meter

should

be

illuminated.

Maximum

Gauge

for

Gauge

for

F.

Depress

the

“Brake

Release”

(center)

lever,

Length

Terminals

1&2

Terminals

3-8

then

release

it.

An

audible

click

should

be

heard

in

the

rotator.

This

is

the

solenoid

oper-

125°

(38m)

#18

(119mm)

#20(97mm)

ating

the

brake

Wedde

200’

(61m)

#16(142mm)

#18(1.19

mm)

300°(91m)

#14(1.75mm)

#16(1.42

mm)

Table

1

9

PIN

CONNECTOR

FOR

ROTATOR

END

OF

CONTROL

CABLE

6

PIN

CONNECTOR

FOR

CONTROL

CONSOLE

END

OF

CONTROL

CABLE

CESS

(WIRE

SIDE

VIEW)

{SOLDER

SIDE

VIEW)

250"

BLACK

PIN1

BLACK

PIN1

WHITE

PIN2

WHITE

PIN2

GREEN

PiNa

GREEN

PINS

BLUE

PIN

4

BLUE

PIN

4

ORANGE

PING

ORANGE

PINS

YELLOW

PING

YELLOW

Pine

BROWN

PIN7

BROWN

PiN7

RED

PINS

CONTROL

CABLE

REO

PIN

8

Figure

2

Control

Cable

Connector

Attachments

NOTE:

The

specifications

call

for

heavier

gauge

wire

in

two

locations.

Leads

#1

and

#2

must

be

heavier

gauge

and

less

total

lead

resis-

tance.

B.

Assemble

the

rotor

cable

as

shown

in

Figure

1.

CAUTION

Shorts

between

terminals

or

grounded

leads

may

damage

the

rotator.

Pay

strict

attention

to

the

pin

numbers

on

the

connectors!

C.

Temporarily

attach

the

6

5/16"-18

x

1

5/8"

screws

(Item

140)

to

the

bottom

of

the

rotor

unit.

D.

With

the

rotator

sitting

in

the

upright

position

and

connected

to

the

control

unit

by

the

8-wire

cable,

plug

the

control

unit

power

cord

into

a

receptacle.

G.

Depress

the

“Brake

Release”

(center)

lever,

hold

it,

and

simultaneously

depress

the

CCW

direction

switch

(left).

The

rotator

should

turn

CCW

(looking

from

the

top).

This

is

S-E-N-W-

S.

Release

the

CCW

direction

switch;

the

ro-

tator

will

coast

down

and

stop.

Now

release

the

brake

switch.

The

rotator

is

now

locked

into

position.

H.

Repeat

the

previous

step

for

CW

direction

by

depressing

the

brake

switch

first,

then

the

CW

direction

switch

(right).

The

red

lamps

should

indicate

direction

of

rotation.

I.

Retum

the

rotator

to

full

CW

position.

CAUTION

It

is

best

to

release

the

direction

switch

just

prior

to

the

end

of

rotation

(extreme

CW

or

CCW

position)

in

order

not

to

cause

undue

stress

on

the

stop

arm

and/or

the

gears.

ATTACHING

CONTACTS

TO

WIRES

AND

CONNECTOR

Since

these

contacts

will

be

inserted

into

connector

blocks,

their

tabs

must

be

carefully

rounded.

Unless

you

have

a

crimpinmg

tool

for

installing

connec-

tors,

use

the

following

procedure.

1.

CUT

WIRE

TO

SPECIFIED

LENGTH.

REMOVE

1/8°

OF

INSULATION

FROM

END.

-|

Pr

/8"

er

2.

INSERT

WIRE

BETWEEN

TABS

IN

CONTACT.

3.

BEND

TAB

TIGHTLY

AROUND

BARE

WIRE

END.

Repeat

for

each

contact.

Pay

close

attention

to

the

numbered

holes

in

the

connector!

Pull

back

lightly

on

each

conductor

to

be

sure

each

contact

is

locked

in

each

cavity.

Once

locked

in

place,

the

contacts

nl

fi

ved

wi

i

|

(Extraction

tool

not

included).

This

tool

consists

of

a

tube

with

an

O.D.

of

0.129

and

an

LD.

of

0.115.

When

inserted

over

the

contact

from

the

front

side,

this

tool

compresses

the

bechang

tabs,

permitting

easy

removal.

4.

BEND

OPPOSITE

TAB

AROUND

FIRST

TAB.

5.

APPLY

SOLDER.

DO

NOT

ALLOW

SOLDER

\

TO

FLOW

INTO

THE

CONTACT

END.

HOLD

THE

CONTACT

END

UPWARD

WHEN

YOU

SOLDER.

oe

4

7.

PUSH

CONTACT

INTO

HOLE

IN

CONNECTOR

SHELL

UNTIL

CONTACT

CLICKS

INTO

PLACE.

CONNECTOR

SHELL

CONTACT

e~.

Figure

3

ae

Attaching

Contacts

to

Wires

and

Connector

5

SOLDER

§,

WHEN

SOLDER

COOLS,

CAREFULLY

SHAPE

END

TABS

AROUND

THE

INSULATION

ON

THE

ne

ff

Uy

SOCKET

MOUTING

INSIDE

TOWER

The

rotator

is

mounted

inside

a

tower

(see

Figure

4)

to

the

flat

tower

plate

by

means

of

six

(6)

bolts

furnished

in

the

hardware

kit.

Use

the

following

procedure:

1.

2.

Locate

the

rotator

in

the

tower

directly

under

the

bushing.

Note

that

the

tower

plate

must

be

cut

out

to

allow

the

connecting

8-wire

cable

to

pass

through

the

plate.

Use

the

template

in

the

back

of

the

manual.

Plug

the

cables

together

and

secure

the

cable

to

the

tower

in

such

a

manner

that

the

cable

will

not

be

strained.

The

rotator

is

attached

to

the

tower

plate

by

means

of

six

(6)

bolts

and

lockwashers

(see

'

Figure

4).

The

flat

tower

plate

must

be

drilled

in

six

(6)

places

using

the

template

provided

with

this

manual

unless

the

tower

plate

is

al-

ready

properly

drilled.

4.

Tighten

the

six

(6)

bolts,

but

not

to

final

tight-

ness.

Observe

how

the

rotator

turns.

It

must

rotate

in

such

a

manner

as

to

tum

the

mast

concentrically

in

the

thrust

bearing.

.

Trial

assemble

the

mast

to

the

top

of

the

rotator

using

the

U-bolts,

nuts

and

lockwashers

through

the

rotator

and

clamp

plate

as

shown

in

Figure

4.

The

maximum

mast

diameter

that

may

be

used

is

2

1/16"

O0.D.

We

recommend

1

1/2"

nominal

steel

pipe

with

1.9"

O.D.

in

stand-

ard

wail

thickness

of

.145".

For

stacked

arrays

or

very

large

beams,

we

recommend

extra

heavy-duty

wall

thickness

of

.200".

Both

steel

pipes

can

be

purchased

to

specification

ASTM-

120.

NOTE:

Apply

a

coating

of

heavy-duty

motor

oil

or

grease

to

the

threads

of

the

stainless

steel

bolts

and

U-bolts

to

prevent

seizing.

|

|

THRUST

BEARING

Figure

4

Rotator

Mounting

in

a

Tower

6

TOP

TOWER

PLATE

MAST

Item

No.

Description

136

Nut,

hex,

5/16"-18,

ss

137

Lockwasher,

split,

5/16",

ss

140

Bolt,

hex

head,

5/16"-18

x

1

5/8",

ss

TOWER

160

Plate,

Mast

Clamp

LEG

161

U-Bolt,

/16"-18

x

3

1/4"

x

4"

On

any

inside

tower

installation,

care

must

be

exercised

to

get

the

antenna

mast

shimmed

to

the

exact

rotational

center

of

the

rotator.

The

geometry

is

such

that

a

mast

of

2.062"

(2

1/16"

[52

mm])

O.D.

pipe

will

be

exactly

centered.

If

the

O.D.

of

your

mast

is

less

than

this,

you

should

shim

out

to

these

dimensions.

6.

Ifthe

rotator,

top

bushing

and

mast

are

properly

aligned,

there

should

be

unrestricted

rotation

through

360°.

If

not,

the

rotator

may

have

to

be

moved

slightly

on

the

flat

plate.

If

a

high

quality

bearing

is

used

in

the

top

of

the

tower

(recommended),

the

shimming

procedure

must

be

done

more

carefully

as

closer

toler-

ances.are

required.

It

is

important

that

the

rota-

tor

does

not

try

to

turn

the

mast

eccentrically

with

the

top

bushing

or

bearing.

7.

Tighten

the

mounting

bolts

carefully

-

to

ap-

proximately

175

inch-pounds

of

torque.

8.

Drill

through

the

antenna

mast

and

rotator

cast-

ing,

using

a

5/16"

drill.

Locate

the

hole

in

the

clamp

plate

that

is

furnished.

Insert

the

bolt

through

the

clamp

plate,

mast,

and

rotator

and

tighten

all

bolts

to

150

inch-pounds.

Refer

to

Figure

4.

9.

Retum

the

rotator

to

the

full

CW

“S”

position.

Mount

the

beam

on

the

mast

pointing

South.

The

coaxial

cable

should

be

looped

in

such

a

manner

that

it

will

not

foul

or

tangle

when

the

beam

tums

around

in

a

circle

to

the

full

360°

counterclockwise

position.

OUTSIDE

TOWER

Referring

to

Figures

5,

6,

and

7,

an

outside

tower

or

pole

mount

is

made

in

the

same

manner

except

that

the

rotator

is

fastened

by

four

(4)

bolts

only

(not

six)

to

the

Lower

Mast

Support,

PN

5146710.

Since

the

eccentricity

of

the

rotator

tuming

in

ref-

erence

to

the

tower

is

no

longer

important,

the

shimming

procedure

is

not

necessary.

The

four

(4)

screws

must

be

torqued

to

the

same

specification

and

the

8-wire

cable

securely

fastened.

The

lower

mast

should

be

pinned

with

the

5/26"-18

x

4"

bolt

as

shown

in

Figure

6.

Bet

en

eae

ae

eee

eee

eee

ee

een nee

wee

ereeee

ene

ee

CAUTION

The

rotator

is

designed

for

vertical

operation

with

the

bell

shaped

housing

in

the

up

position.

Water

and

other

contamination

will

get

into

the

motor

unit

if

it’s

mounted

horizontally

or

upside

down.

as

ae

te

IIIA

AL

AAA

AAA

ee

eee

eee

ee

EEE

Te

ETT!

OCR

RHEREEEOK

REE

REE

RHOH

ETRE

RSENS

RRO

HERRERO

HHH

ESHER

E

EOE

E

RENO

O

HERE

RHEE

~N

BEAM

NOT

TO

EXCEED

10.0

SQUARE

~~

FEET

(.93

m7)

WIND

SURFACE

—

AREA

LOAD.

—

y

———

ms

=

Ware

+

Sa

sy

es

<<

BBS

VA

SS

x

BEAM

TO

TOP

OF

ROTATOR

=

NOT

TO

EXCEED

2

FEET

(807

mm)

i

ee

em

ROTATOR

y=

eA

8-WIRE

CONTROL

CABLE

als

COAXIAL

CABLE

-

"

LOOP

TO

PERMIT

FULL

eS

1

360°

ROTATION

OF

BEAM

|

ppp

Lf

<>

an

|

——S=—=—=_—

———

7

><

1

aN

||

Lr

5

I

4

SS

HT

a

ce

=e/

Figure

5

Rotator

Mounted

On

Tower

Top

Plate

~l

OPTIONAL

KITS:

HEAVY-DUTY

LOWER

MAST

SUPPORT

KIT

(51467-10)

(Optional)

The

stock

Tailtwister

T2X

is

intended

to

mount

on

the

base

plate

inside

of

the

tower.

However,

in

some

instances,

outside

tower

or

mast

mounting

is

desired

as

per

Figures

5

and

6.

This

kit,

P/N

5146710

contains

a

heavy-duty

lower

mast

support

and

the

necessary

hardware

to

facilitate

mounting

the

T2X

on

top

of

a

tower

stub

or

mast.

Item

No,

Part

No.

Description

5-1

51423800

Clamp,

lower

mast

...,..,..00

peteatts

ie

ies

ds

1

56

5-2

5142700

U-Bolt,

5/16"-18

x3

1/4"

x4"...

a2

5-5

(5

PLACES)

5-2

5-3

5142401

Bolt,

5/16"-18

x

4),

hex

head,

ss.

wl

54

(5

PLACES)

/

53

5-4

555747

AUT,

5/16"-18,

hex,

SS

oo.

L5

yh.

=

$-5

564792

Lockwasher,

5/16",

split,

ss

...

iS

beans

BS

5-2

5-6

5142602

Support,

lower

MaSt

.cccseeecec--

wl

aie

.

ae

5-7

107632061

Screw,

46-32

x

3/8",

round

head.

3

$-4-

5-8

5033900

Cover,

terminal...

wal

$-9

5091400

Grommet

.........

oe

|

(4

PLACES)

Go

cces

ssc

ca

eee

nan

CeB

Eee

Ree

ee

Ree

eee

eee

ec

eee

esesesacsass

BOLTs,

es

-18X

1

6/8°),

ee

AND

5/16"

SPLIT

2

NOTE

LOCKWASHERS

THAT

i

THIS

IS

AN

ACCESSORY

KIT

AND

SHOULD

BE!

CAME

WITH

THE

ROTATOR

PURCHASED

FROM

YOUR

DISTRIBUTOR/DEALER

|:

wf

-

WIRE

CONTAOL

CABLE

i

CAUTION

i

?}

When

the

rotator

is

installed

using

the

lower

mast}:

i

Figure

6

i

support

kit,

the

antenna

size

must

be

restricted?

Rotator

Mounting

with

Lower

Mast

Support

Hto

10

square

feet

(.93

m2)

of

wind

surface

area.:

ee

OSSBSSsSSsssessssscssssscccecsnssassescsesseseeeeeeceeeeeeeleaed

7

"

Sis

&

ae

ne

by

SSi

gi

|

a

oe

sai)

a

»

in

BEAN

TO

TOP

OF

ROTATOR

~

NOT

TO

EXCEED

2

FEET

(007

mm)

=

BEAM

NOT

TO

EXCEED

7.6

GQUARE

—>

FEET

(0.7

mo?)

WIND

SURFACE

AREA

|

ae

LOAD

HAM

WEARER

Va

i

toon

to

penne

FULL

36a°

ROTATION

OF

BEAM

-y

LOWER

MAST

SUPPORT

\aerp

PN

61467-10

ONLY

i

/\L

G-WIRE

CONTROL

CABLE

J—3—|}

Co

KF

APPROPRIATE

QUY

WIRES:

we

a.

SS

4

J

\

SS

Figure

7

Pole

Mounted

Rotator

8

PRELIMINARY

CHECK

AND

CALIBRATION

IMPORTANT

THERMAL

PROTECTION:

If

the

rota-

tor

fails

to

turn

after

4

or

5

minutes

of

continuous

operation,

the

thermal

switch

has

come

into

play.

This

protective

device

in

the

transformer

automatically

shuts

off

power

if

the

rotator

is

used

continuously

for

too

long.

It

will

automatically

reset

after

10

minutes.

1.

Tum

the

Control

Unit

Power

“ON”

with

the

upper

right

“ON-OFF”

switch.

The

meter

should

be

illuminated

and

the

needle should

be

to

the

right.

2.

Depress

the

brake

lever

(center)

and

hold.

De-

press

the

CCW

lever

(left)

and

operate

the

rotator

to

its

full

CCW

position.

If

the

meter

does

not

move

from

the

right

to

the

left

hand

position,

press

and

release

the

“Calibrate”

switch.

3.

With

the

rotator

in

its

full

CCW

position,

if

the

meter

is

not

at

its

full

left

position,

carefully

adjust

the

zero

(CCW

South)

position

with

the

screw

directly

under

the

meter

to

exactly

South.

4.

Meter

Calibration

Procedure:

Operate

the

rotator

to

its

full

clockwise

position.

Adjust

the

calibration

potentiometer

until

the

meter

indi-

cates

full

scale

to

the

right.

The

meter

is

now

calibrated.

Do

not

adjust

the

calibration

poten-

tiomgter

when

the

rotator

is

in

any

position,

other

than

full

clockwise.

When

the

control

unit

is

turned

“OFF”,

the

meter

needle

will

fall

to

the

left

“S”

position

and

return

to

indicate

the

rotator

position

as

soon

as

the

control

unit

is

tumed

“ON”

again.

It

will

not

damage

the

unit

to

leave

it

tumed

“ON”

for

extended

periods.

NORMAL

OPERATION

To

operate

the

rotator,

it

is

necessary

to

understand

the

T2X

Brake

Release

Lever

and

its

function.

The

brake

lever

(middle

lever)

on

the

Control

Unit

operates

a

brake

wedge

mechanism

in

the

rotator

which

locks

the

rotator

into

position

mechanically.

The

rotator

cannot

tum

unless

the

wedge

is

re-

tracted

by

depressing

the

middle

lever.

The

normal

operation

is

as

follows:

1.

Retract

the

brake

wedge

by

holding

down

the

“Brake

Release”,

middle

lever.

(Green

light

on.)

NOTE:

The

brake

wedge

will

be

retracted

only

while

the

Brake

Release

lever

is

held

down.

2.

Tum

the

rotator

to

the

compass

location

by

pushing

down

and

releasing

either

the

left

hand

or

the

right

hand

lever.

Allow

a

few

seconds

for

the

rotator

to

coast

down.

Then

re-engage

the

brake

wedge

by

releasing

the

“Brake

Release”

(middle)

lever.

OPERATING

PRACTICE

The

rotator

has

several

mechanisms

to

protect

it

from

misuse,

but

the

following

precautions

are

advisable.

1.

If

you

have

a

very

large

beam,

the

rotator

can

be

“nudged”

to

exactly

the

desired

position

by

alternately

working

the

left

and

right

control,

allowing

it

to

coast

down

before

the

brake

wedge

is

allowed

to

engage.

2.

It

is

advisable

not

to

run

it

full

speed

into

the

end

of

rotation.

3.

Upon

completion

of

tuming,

always

allow

the

rotator

to

coast

down

by

keeping

your

finger

on

the

“Brake

Release”

after

you

have

released

the

rotation

lever.

This

procedure

will

allow

the

rotator

to

stop

before

you

re-engage

the

brake

wedge.

Observing

this

sequence

prevents

the

rotator

from

stopping

suddenly

thus

preventing

undue

stress

on

the

rotator,

beam,

and

tower.

The

motor

has

an

internal

brake

which

controls

the

coast

down

time

and

deceleration.

The

internal

mo-

tor

brake

is

usually

strong

enough

to

prevent

pin-

wheeling

during

operation.

GROUNDING

The

tower,

or

other

metal

support

device,

must

be

grounded

to

an

earth

ground

at

its

location.

Use

heavy

copper

cable

looped

so

that

if

the

tower

comes

down

for

any

reason,

there

will

be

adequate

slack

to

prevent

the

ground

wire

from

breaking.

Use

one

or

more

8

foot

copper

jacketed

steel

stakes

driven

into

the

moist

earth

and

fasten

the

wire

securely

at

the

stake

and

at

the

tower.

As

mentioned

in

the

“Cautions”

portion,

the

steel

chassis

of

the

control

box

should

be

either

grounded

to

a

metal

cold

water

pipe

in

the

house

or

back

to

the

electric

service

entrance

box

where

the

power

comes

into

the

house.

This

normally

is

ac-

complished

with

the

wire

of

the

3-prong

plug

which

then

depends

on

the

wall

outlet

being

adequately

grounded

back

to

the

service

entrance

as

to

the

utility

ground.

If

there

is

any

doubt,

have

this

checked

by

a

licensed

electrician.

SOUTH-CENTER

METER

SCALE

CONVERSION

The

stock

Tailtwister

Control

Unit

is

shipped

with

the

meter

scale

installed

for

“North”

center

opera-

tion;

ends

of

rotation

are

at

the

“South”

position.

Some

geographic

locations

and/or

popular

working

areas

may

favor

having

the

meter

“South”

center;

ends

of

rotation

are

at

the

“North”

position.

We

have

provided

the

Tailtwister

with

an

interchange-

able

meter

scale.

We

recommend

the

following

procedure:

1.

Disconnect

the

power

cord.

2.

Remove

the

8-wire

control

cable,

carefully

ia-

beling

each

wire

with

its

corresponding

termi-

nal

number.

This operation

may

be

omitted

if

the

control

box

can

be

worked

on

easily

without

removing

the

leads.

3.

Remove

the

top

and

bottom

covers.

4.

Slip

the

lamp

and

holder

off

the

lamp

holder

bracket.

Loosen

the

hex

nut

on

the

transformer

that

is

holding

the

lamp

holder

bracket

and

swing

the

bracket

clear

of

the

wires

leading

to

the

printed

circuit

board.

5.

Carefully

remove

the

hex

nuts

on

the

meter

studs

to

free

the

printed

circuit

board.

Slip

the

P.C.

Board

off the

studs

and

pull

it

down

under

the

chassis.

10

CAUTION

It

is

good

practice

to

use

a

short

test

lead

or

jumper

wire

to

short

the

meter

studs

when

it

is

not

in

the

circuit.

6.

Loosen

the

meter

retaining

clips

and

remove

the

meter

from

the

chassis.

7.

Insert

a

small

knife

blade

between

the

clear

meter

cover

and

black

housing

at

either

comer

of

the

top

edge

and

gently

pry

the

cover

loose

from

that

corner.

Repeat

for

the

other

corner.

The

meter

cover

should

pop

off.

8.

Carefully

slip

a

knife

blade

under

each

comer

of

the

lower

edge

of

the

white

meter

scale

and

twist

slightly

until

the

scale

clears

the

two

small

indexing

pins.

Remove

the

scale

and

install

the

new

one.

Make

sure

the

scale

fits

over

the

indexing

pins

and

that

it

is

flush

and

tight

against

the

black

housing.

This

will

assure

free

movement

of

the

indicator

needle.

9.

Reinstall

the

meter

(remove

the

temporary

jumper),

the

P.C.

Board

and

lamp

hardware.

Check

for

pinched,

shorted

end,

or

overstressed

wires.

10.

Reinstall

the

top

and

bottom

covers.

11.

Reconnect

the

8-wire

control

cable

in

the

exact

sequence

as

they

were

removed.

If

your

beam

was

installed

originally

using

the

T2X

with

a

“North”

center

scale,

the

antenna

mast

must

be

loosened

and

repositioned.

In

order

for

the

meter

to

indicate

properly,

the

front

of

your

beam

must

point

“North”

when

the

rotator

is

at

the

ends

of

rotation.

Recalibrate

the

meter.

NOTE:

In

the

past

the

South

Centered

meter

scale

was

on

the

reverse

side

of

the

factory

installed

North

Centered

scale.

The

unit

is

now

provided

with

a

separate

South

Centered

scale.

This

will

help

to

avoid

damage

to

the

face

of

the

meter

scale

during

removal

of

the

North

Centered

scale.