KING KMA 20, KR 21 Installation Manual

KIN

G

KMA

20/KR

21

MARKER

BEACONRECEIVER

ISOLATIONAMPLIFIER

INSTALLATION

MANUAL

006-0044-02

REV.

2

JUNE,

1976

KlNG

KMA

20

/KR

21

MARKER

BEACON RECEIVER/

ISOLATION

AMPLIFIER

TABLE

OF

CONTENTS

SECTIONIGENERALINFORMATION

Paragraph

Page

1. 1

Introduction

1-1

1.

2

Technical Characteristics

1-2

1. 3

Accessories Required

1-6

SECTIONIIINSTALLATION

2.

1

General

2-1

2.2

Unpacking and

Inspecting Equipment

2-1

2.

3

Installation

Notes and

Precautions

2-1

2.4 Installation

Procedure

2-2

2.

5

Marker

Antenna

Installation

2-2

2.

6 KA 40

Installation

(Optional)

2-3

SECTION

III

OPERATION

3.

1 Marker

Beacon

(KMA 20 and KR

21)

3-1

3.2

Isolation Amplifier (KMA

20)

3-2

LIST

OF

ILLUSTRATIONS

Figure Page

2-1

KMA 20 Installation

Drawing

2-4

2-2

KR

21

Instanation

Drawing

2-5

2-3

KA

40

Instanation

Drawing

2-6

2-4

KMA

20

Interconnect Diagram

2-7

2-5

KR

21 Interconnect Diagram (27. BV

DC')

2-9

2-6

KR 21 lnterconnect

Diagram (13. 75VD(')

2-9

2-7

KA

40

lnterconnect Diagram

2-10

2-8

Pin Function

for

000-1024-00

thru

-16

2-11

i

KING

KMA 20/KR

21

MARKER

BEACON

RECEIVER/

ISOIATION

AMPLIFIER

HISTORY

OF

REVISIONS

Hevision

1, August 1972

Page

Reason

for

Change

Title

Page

Denotes

New

Revision

Warranty

New

Warranty

Contents

Table

of

Contents

Added

History of Rev.

History

Revision

Added

1-1

Lamp

Test

Information

Added

1-3

Sensitivity

and

Selectivity

Revised

1-4

Word Misspelled

1-6

Installation

Parts List

Added

2-1

Warning

Note Added

2

-2

Paragraph

6 Changed

to

7.

New

Paragraph

6 added.

2-3

Figure

Numbers corrected

2-4

New

Installation

Drawing

2

-5

New

Installation

Drawing

2-6

Drawing

Turned on

Page

2-7

Interconnect Corrected

2-11

Pins

Reversed

2

-13

Figure Added

2-15

Figure Added

3

-1

Marker Dese ription

Changed

3-1

Information Added about

HI-LO

Switch

3-2

09/11

Information

Added

ii

KMA20/KR 21

MARKER

BEACON

RECEIVER/

ISOLATION

AMPLIFIER

HISTORY

OFREVISIONS

Revision 2, June,

1976

Page

Reasons for Change

Title Page

Denotes

New Revision

Warranty

Deleted

Contents

Page Number

changes

History

of Revision Added for

Revision 2

1-3

Technical

Characteristics Updated

2-2

Paragraph

2.3

(5)

updated

Paragraph

2.3

(7)

updated

2-7

Interconnect updated

2-9

Figure

2-6A

changed to

2-5

Figure

2-6B

changed to

2-6

2-11

Figure

2-8

updated

3-2

Section

3.2 updated

iii

KING

KMA

20/KR

21

MARKER BEACON

RECEIVER/

ISOLATION AMPLIFIER

SECTION

I

GENERAL

INFORMATION

1.1

INTRODUCTION

The

King

KMA 20 is a

compact

transistorized unit

providing the

functions

of

marker

beacon

receiver,

isolation amplifier

and

audio control panel.

The

unit has been

styled

to harmonize with

the

all new

generation

of

Silver

Crown

panel mounted

equipment.

TSO

certification

of the

KMA 20 assures

operation under

varying

environmental

conditions.

The KMA

20 is

designed to

provide

a

uniformly functioning

aircraft radio

system when

utilized

with other

units

of

the new Silver

Crown

line. Although the

equipment is designed

primarily

for use with the KX

170

NAV/COMM unit,

it will also perform

effeciently

with

older Silver

Crown

transceivers and

radios.

Significant

new

features

of

the KMA 20

design

include its

AUTO

switch

feature:

semi-

concealed

marker light

presentation and

its ability

to control COMM and

NAV audio

independently. Automatic

dimming

circuitry

for the marker

lamps,

to

compensate

for

ambient

cockpit

lighting,

is also

incorporated in the design.

Within the KMA 20, the

marker beacon receiver comprises

one

section

of

the

unit.

The

marker

receiver

of

the KMA 20,

available

without

the isolation

amplifier and audio

panel is the KR 21. The

receiver

is

a crystal controlled

superheterodyne

receiver

and

has

excellent

selectivity

and

freedom

from

interference

of

television and FM stations.

Operating controls

for the

marker receiver consists

of

two

toggle switches on the KMA

20: a

HI-LO

sensitivity

and lamp

test control and an

audio

selector

switch. The KR

21

has

only

the

HI-LO

sensitivity

and

lamp

test control. A three light

presentation

is de

signed into the

front

panel of

the unit

with

colored lenses

to indicate passage over

the

markers.

Besides

the

colors,

the stations

are identified

by

the

letters

A-O-M

engraved

on the lenses plus

the

appropriate

frequency

audio

tone.

Should the

aircraft

user

desire

a

remote

location for

the

marker

lights,

King

Radio Corporation

manufacturers

an

optional

remote

light

assembly

designated the KA 40

for

use with the KMA

20

only.

The

isolation

amplifier

of

the KMA 20

makes

possible the

combining

of

all receiver

audio

inputs

into

a single cockpit

speaker

with 40db

of

isolation between each

radio. The

input

power levels

of

the

signals are

amplified

to the

level

necessary

to drive a

4 ohm

speaker.

An

electronic

muting

circuit (diode

switch) is provided to

automatically

isolate

the output

of

all receivers from

the isolation amplifier

whenever the microphone

button

Rev.

1,

August, 1972 Page

1-1

KING

KMA 20/KR 21

MARKER BEACON

RECËIVER/

ISOLATION

AMPLIFIER

is

pressed.

This

feature

eliminates

the

possiblity of

audio feedback in the cockpit.

The

amplifier design utilizes

only

one

integrated

circuit

and a

push-pull

output

stage

for

high

reliability.

Audio

control

functions

of the

Silver

Crown

radio

system are

performed at

the

front

panel of the KMA 20. A microphone

selector

rotary

switch,

a

series

of

eight audio

selector switches and a marker beacon

receiver

sensitivity

control are the operating

controls

of

the

unit.

The microphone selector routes audio

and

keying information to

the

selected transceiver or to

a EXT

ramp

hail

speaker or passenger

address system.

The

AUTO switch control

of the

standard

model is

utilized

in

conjunction with the

micro-

phone

selector

switch.

For normal operation

of

the AUTO

switch,

COMM 1 and COMM

2

are placed in

the

center

(off) position. With

the

AUTO

switch in

the

SPEAKER position,

the

receiver

audio selected

is

automatically

controlled

by the operation of

the

micro-

phone

selector.

Thus if

transmitting

on

COMM 1,

receiver

audio

for

COMM

1

will be

routed to the

cockpit

speaker.

This

feature eliminates the constant manipulation

of

COMM receiver

audio

selectors

when

switching

back and

forth

between

transmitters.

Speaker,

off

or

mute,

and

headphone audio

control

of

each of

the

aircraft

radios is

accomplished

with the

remaining

three-position

toggle

switches.

A

series type solid state

regulator

is used to

supply

the regulated

voltage

to

the

marker

receiver and

audio boards

of

the

unit. Since

each aircraft

installation is

wired

for

eithier

13.

75

or

27. 5V operation

of the

unit,

the KMA 20

and

KR 21 are

completely

interchange-

able

between

aircraft with

no

internal

wiring

changes.

1.2 TECHNICALCHARACTERISTICS

MARKER

BEACON

RECEIVER

-

KMA

20/KR

21

SPECIFICATION

CHARACTERISTIC

TSO

COMPLIANCE: TSO C35c Env.

Category

DACAAAX.

CONTROL: Panel mounted

equipment.

All operating

controls are on

the front panel

of

the

unit.

DUTY

CYCLE:

Continuous.

INPUTS:

Standard

model

accomodates

two

transceivers

and four

external

receivers,

International

model

accomodates

three

transceivers

and

four

external

receivers.

INPUT

IMPEDANCE:

500

ohms.

INPUT

ISOLATION:

40db

between

input

channels.

INPUT

SELECTOR SWITCHES: Each

isolated

audio input has

three independent

terminations:

SPEAKER, OFF

or

PHONE.

INPUT

MUTING:

Audio

Muting

is

40db

or

better

when a

trans-

mitter

is

keyed.

Rev.

2,

June,

1076

Page

1-3

KING

KMA

20/KR

21

MARKER BEACON

RECEIVER/

ISOLATION AMPLIFIER

SPECIFICATION

CHARACTERISTIC

SPEAKER

OUTPUT:

4

ohm

output:

Rated

power

output

is

6. 25

watts at the4ohms

speaker

output.

With

a supply voltage of

27.

Svde,

output

power

capability

increases

to

8 watts.

8

ohm

output:

Rated

power

output

is

6,

25 watts at the 8

ohm

speaker

output. With a supply voltage

at

27.

5

vde,

output

power

capability

increases

to

8

watts.

DISTORTION: Less

than

10a/o

at rated

output.

FREQUENCY RESPONSE:

.

Within 6dh

from 350Hz

to

3000Hz.

KMA 20

GENERAL

POWER REQUIREMENTS:

lnstrument panel lighting: 13. 75V 27.

5V

KMA 20

idle

current:

300ma 150ma

KMA 20

operating current:

1. 1

amps 1.1amps

PHYSICAL DIMENSIONS:

Length: 6. 293

inches

behind instrument

panel.

Width:

6. 2

inches.

Height:

1. 6

inches.

WEIGHT: 2. 3

lbs.

KR

21

GENERAL

POWER REQUIREMENTS:

Idle

Current:

170ma

at 13.

75V

120ma at

27.

5V

Operating Current: 300ma

at 13. 25V

250ma

at

27.

5

V

Panel Lighting:

None

Page

1-4

Rev. 1,

August,

1972

KING

KMA

20/101

21

MAR<ER

BEACON REC,EIVER/

I3OLATION

AMPLIFIER

SPE

CIFICATION

CHARACTERISTIC

PHYSICAL

DIMENSIONS:

Length:

5.

667 inches

Width: 3.

20 inches

Height:

1. 050

inches

WEIGHT:

0.

562 lbs.

KA

40

GENERAL

POWER

REQUIREMENTS:

Marker

lamp

power

furnished

by KMA

20

0.

125

amp

while the

lamp

is

operating.

PHYSICAL

DIMENSIONS:

Length: 2.5inches

(including

connector)

Width: 3. 2 inches

Height:

1.

05 inches

WEIGHT:

0.

25 lbs.

November,

1969

Page

1-5

KMA20/KR 21

MARKERBEACON

RECEIVER/

ISOLATION

AMPLIFIER

1.3

UNITS/ACCESSORIES

REQUIRED

A.

Unit: KMA

20 KPN

066-1024-XX

(See Figure

2-8)

KR 21 KPN

066-1021-01

B.

KMA

20

Installation Kit:

KPN

050-1167-00

KR

21 & KA40 Installation Kit:

030-2016-00

Connector

and

089-6163-05

(4)

screws

Both

are

included

with unit.

Installation

Kit

050-1167-00

consists

of

the,following:

QUANTITY

DESCRIPTION

KING PARTNO.

1

Solder Lug (Dual)

008-0041-00

2

Cable

Half

Clamp

030-1019-00

1

32

Connector

Ampheno1

26-190-32

030-2061-01

1

Mounting

Plate

Cover

047-1760-00

1

Mounting

Plate

Connector

047-1762-01

2

#4 Esna Nut

089-2188-22

2

Flathead

4-40

x

5/16 Screw

089-5523-05

4

Pan Head

4-40

x

1/4 Screw

089-5903-04

2

Pan

Head

6-32

x 1/4

Screw

089-5907-04

2

Pan Head

4-40

x

5/16 Screw

089-5903-05

2

Flat Washer

089-8025-30

Accessories:

KA

40 Remote

Lamp Assembly

(071-0003-00)

Page

1-6

Rev.

2,

June,

1976

KING

KMA 20/KH

21

MARKER

BEACON

RECEIVElt/

ISOLATION AMPLIFIER

SECTION

II

INSTALLATION

2.1

GENERAL

Installations of the KMA

20,

KR 21 and

KA

40 will differ

according

to

the

number

of receivers

installed,

equipment location

and other factors.

The

cable harness

will

be fabricated

by

the

installing agency

to fit

these

various

requirements.

This

section

contains

interconnect diagrams,

mounting

dimensions

and information pertaining to installation.

2.2

UNPACKINGANÐINSPECTINGEQUIPMENT

Exercise

extreme

care

when

unpacking the

equipment.

Make

a

visual inspection of the unit for

evidence of

damage incurred

during

shipment. If

a claim

for

damage

is to

be made,

save

the

shipping

container

to

substantiate the

claim.

The claim should be

promptly filed with

the

transportation

company. When the equipment

has

been

removed,

place

in the shipping

container

all packing,

bracing

and

filler

used

in

the

original

packing. Save

the

packing

material for use

in

unit

storage

or

reshipment.

2.3

INSTALLATION

NOTESAND

PRECAUTIONS

-WARNING-

See

Figure

2-BA

& H before

proceeding with cable

assembly.

The KMA

20

will conform to the needs of the customer,

installing

agency

and

existing

conditions

as to unit

location

and

type

of installation. Customer options will determine the

exact

wiring

details

to

be utilized in

the

installation.

llowever,

the

following

suggestions should

be considered

before proceeding with

the

actual installation. Close adherence to these

suggestions

will assure

a more

satisfactory

performance

from the equipment.

(1)

Placement.

Select

the equipment

location.

The KMA

20

may

be

rigid mounted

in any

location which will accomodate the

necessary

front panel space requirements and the

depth

required

behind the

aircraft instrument panel. Since

the

unit

is

shorter

than

the other

radios,

it

is

normally

mounted at

the

top of

a

vertical

stack.

When

the

equipment cover

(mounting

tray)

is

installed,

a

front-operating

hold

down screw allows

easy

installation and

removal of the unit

from

the

aircraft mounting

tray.

If

possible leave enough space on the

sides

of the unit face

panel

to allow

grasping

the

unit

during

removal.

Thembove applies

to

the

KR 21 and KA 40 and

additionally they

may be

mounted either

vertically

or

horizontally

by changing the

marker

lenses.

(2)

Cable

Routing.

When

shipped,

the protective cover

and

connector

mounting

plate on

the

rear

of

the equipment

cover

are

assembled for

the cable

to

emerge

from the right side of

the unit.

If

it is

desired that the

cable emerge

from

the

left

side

of

the unit, the

connector

mounting

plate may

be

reversed.

The

only

precaution

to take

is

that

Pin 1 of the unit connector

mate

with Pin 1

of

the harness

connector when

the

unit

is installed.

(3) System

Grounding.

On

all

receivers

which have separate audio grounds,

it is

recommended

that these

grounds

be carried

to a

solder

lug on the

connector

mounting

plate

of the

KMA

20.

All audio

grounds should be

terminated here

io

minimize

the possibility of

ground

current

noises being

introduced

into

the

audio

system. It is also suggested

that

the

grounding

connections from the

speaker or

speakers be

made

at

the KMA

20 ground terminals.

Rev. 1,

August, 1972 Page

2-1

KING

KMA 20/KH

21

MARKER BEACON

RECElVER/

ISOLATION

AMPLIFIER

(4)

Supply Voltage. Since

the internal

wiring

of all

KMA

20 units

is

the

same,

wiring

for

different

de supply voltages

is not

necessary. Wiring

information

is shown in the

installation

wiring

diagrams.

This

is

also the

case

in the

KR 21,

(5) Ramp Hailer.

(-00/07

Versions)

The location and installation

procedure

for

the

optional

Ramp

hail" speaker, or

alternately a

PA

(passenger

address)

system,

will

be

developed

by the

installing

agency.

When

installation information from

the

airframe

manufacturer

is

available,

it should be

utilized.

A

speaker

having

a power capability of

at

least

8

to

10

watts

and

an impedance of 8 ohms is

required.

Ifaramp hail

or

PA

speaker

is

not

utilized,

the

EXT

speaker

output

must be

terminated

with a

load

resistor.

This is accomplished

by

terminating

9 with an external

8

ohm

resistive load. KMA20's

11233 had

an internal

resistor

available at

Pin 8.

However,care

must

.be

made

to

make

certain which

resistive load configuration is

in

the KMA20to be

installed.

(6) P.A.

(-09/10/11

Versions)

The

-09/10/11

Versions of

the KMA

20

have

an

extra

4

ohm

audio

output

which

is selected by the

mic-selector

switch can

be

used

for passenger

address

system. The

09/10/11 versions have both EXT

(Ramp

Hailer)

and

P.A.

passenger

address

capability.

(7) Transceiver Speaker

Output

Terminations.

Nearly all

current and recent

transceivers

have

a

4 ohm output connection from the

amplifier-modulator

to feed

a

cockpit

speaker

directly when

an isolation amplifier

is

not used.

Since the audio

inputs to

the

KMA

20 use the

500

ohm headphone output

connection,

the 4 ohm output of such

amplifiers

is

not loaded. To

eliminate this

undesireable

condition,

twos ohm

resistors

are

provided

in the

KMA

20

to

perform

this

loading

function.

2.4

INSTALLATIONPROCEDURES

(a) Study

the

installation

to allow adequate

space for installation

of

the connector and

cable.

(b)

After

the location is

determined,

make the panel cutout using the dimensions

shown

in

Figure

2-1

(KMA

20)

or Figure

2-2

(KR 21)

or

Figure

2-3

(KA 40).

(c)

Refer

to

Figure

2-1

(KMA 20)

or

Figure

2-2

(KR 21)

or Figure

2-3

(KA

40)

for the

four

mounting

hole

locations.

Mark,

punch and drill the

holes

in the

aircraft panel

mounting

bracket.

(d)

Secure the

equipment

cover

(mounting

rack) to

the

instrument panel

mounting

(KMA

20

only).

(e)

Fabricate the external cable in

accordance with the installation

wiring

diagram

taking

note of the preceeding

installation

precautions.

(f)

Mount

the

KR

21

in

the panel and connect the

wiring harness.

-CAUTION-

Do

not

overtighten

the

locking

screw.

2.5

MARKER

ANTENNA

INSTALLATION

Any

standard

type

Marker Beacon Receiver

Antenna

meeting TSO

requit

ements

may

be

used

with

the KMA

20

or KR

21.

However,

due to

the possible variations

and sensitivifles of the

antennas,

it is

suggested

that a

flight check be

made after installation

to

determine if the

sensitivity

setting

Page

2-2

Rev.

2, June,

1976

KING

KMA

2Ò/KE

21

MAHKER BEACON RECEIVER/

ISOLATION AN PLI

FIER

in the

receiver

should

be

changed

to

compensate

for

the sensitivity

of the

antenna. It

is

recom-

mended

that

coaxial

cable

RG-58/U

be

used for

connecting

the antenna

to the KMA

20

or

KR

21

Marker

Receiver

Antenna

terminals.

2.6KA40

INSTALLATION

(OPTION)

If the

King KA 40

Remote Light

Adapter

is utilized,

consult

the

outline and

dimension

drawing,

Figure

2-3

for

attaching

the unit to the

instrument

panel.

Wiring

information

for

the KA

40

is

contained in the installation

wiring

diagram of

the

KMA 20.

Rev, 1,

August,

1972

Page

2-3

KING

KMA

20/KR

21

MARKER

BEACONREGEIVER/

ISOLATION

AMPLIFIER

I

O

(3

CUTOUT DIMENSIONS

LS60

FOR

BEHIND

AIRCRAFT

PANEL

MOUNT

(

587)

6750

NOTES

I DIMENSIONS

IN PARENTHESIS ARE IN CENTlMETERS

(762)

2.

WEIGHT 2.3LBS

3000

I

g

(15.94)

6281

(

4.12)

CUTOUT

DIMENSIONS

FOR

1.620

FRONT AIRCRAFT

PANEL MOUNT

REE

293

THIS

SURFACE

FLUSH

WITH

INSTURMENT PANEL

2

650

FIGURE

2-1

KMA 20

INSTALLATION

DRAWING

(DWG.

NO.

155

-50

51-00)

Page

2-4

Rev. 1, August,

1972

KING

KMA

20/ R

21

MA (KER

BEACON

RECEIVER/

ISOLATION AMPLIFIER

-

o

---

2.700

-

0.056

(6.858) (0.142)

--

2.812

--

(7.142)

(8.128)

(0.4 75) (IS.062)

3.200

-

O.iB7

-- 5.930----

---

NOTES I ALL

DIMENSIONS

IN

PARENTHESIS

ARE

IN CENTlMETERS.

2

WEIGHT 0.562 LBS.

FIGURE

2-2

KR 21

ÏNSTALLATION

DRAWING

(DWG.

NO.

155-5052-00)

Rev.

1,

August,

1972

Page

2-5

KING

KMA 20/KR 21

MARKER

BEACON RE CEIVER

/

ISOLATION

AMPLIFIER

†

-O

-

O

*

-O

-

O

2.700

i

WO.056

(6.858)

(0.142)

2.8

12

a

(7.l42)

(

38

(

OO

4

)

2

O75

N

OTE Si

I.

ALL

DIMENSIONS IN

PARENTHESIS

ARE IN

CENTIMETERS.

2.

WEIGHT: 0.25

LBS.

FIGURE

2-3

KA

40

INSTALLATICN DRAWING

(DWG.

NO.

155-5053-00)

Page

2-6

Rev.

1,

August,

1972

KING

KMA 20/KR

21

MAEKER BEACOlN RECEIVER/

SOLATION

AMPLIFIER

JiOI

PIOI

A

NC

B B

NC

|

C C

a

27.5

V

DC

D D

NC

KR

21

K

POWER AND

AUDIO

GROUND

I

E

i

500A

AUDIO

OUTPUT TO ISOLATION

AMPL.

F

NC

J

RG-58/U

COAX

FROM STANDARD

H

MARKER BEACON

RECEIVERANTENNA

L

-

FIGURE

2-5

KR

21

INTERCONNECT

DIAGRAM (27.

SV)

(696-1801-01)

JIOI

PIOI

A

NC

B

NC

C

13.75

V

DC

D

N.C.

KR

21

K

POWER

AND

AUDIOGROUND

I

E

E 500.0.

AUDIO

OUTPUT

TO

ISOLATION

AMPL.

F

NC

J J

RG-58/U

COAX

FROM

STANDARD

L

H

MARKER

BEACON

RECEIVER ANTENNA

FIGURE

2-6

KR

21 INTERCONNECT

DIAGRAM

(13.

75V)

(DWG.

NO.

696-180

1-00)

Rev.

2,

June,

1976

Page

2-9

KING

KMA

20/KR

21

MARKER

BEACON RECEIVER

ISOLATION AMPLIFIER

KMA20

|

PART

OF P2OI

P401|J4OI

KA

40

A A

21 B

B

20

C

f D D

E E F F H

H

J J

K

l

FIGURE

2-7

KA

40

INTERCONNECT

DIAGRAM

(DWG. NO.

696-1802-00)

Page

2-10

Rev.

2,

June,

1976

(MA20/KR 21

MARKER

BEACON

RECEIVER/

ISOLATION

AMPLIFIER

FUNCTION

VERSION

1

A/C

Ground

-00

through

-16

2

Inst.

Light

Ground

-00

through

-16

3

Inst. Light

Dimmer

(13.75VDC)

-00

through

-16

4

A/C

Power

-00

through

-16

5

Non-Switching

500 ohm

Input

-00

through

-16

6

Speaker Output

(Comm

1)

-00

through

-16

7

Speaker Output

(Comm

2)

-00

through

-16

8

Speaker Load Common

(Comm1

and

2)

-00

through

-16

9

Ramp

Hailer 8

ohm

-00

through

-16

10

A/C

Speaker

4

ohm

-00

through

-16

11

Mic Audio

In

-00

through

-16

12 HF Mic Audio

-00

through

-16

13

HF

(Radio

Tel)

500 ohm Input

No Conn. for

versions

-00,

-03,

-06,

-08,

-09,

-13,-14,-15

and-16.

HF

Audio

In

for

versions

-01,

-02,

-04,

-05,

-07, -10,

-11.

Radio

Tel

Audio in

for version

-12

14

Comm

1

Audio

-00

through

-16

15

Comm

2

Audio

-00

through

-16

16

Nav

1

Audio

-00

through

-16

17 Marker Ant

-00

through

-16

18

Marker

Ant.

Ground

-00

through

-16

19

Wht. Light Out

-00

through

-15

Marker Beacon Rcvr

Audio

In for

version

-16

-

?/

/

Ÿ

20

Blue

Light

Out

-00

through

-15

No

conn. for version

-16

21

Amber Light Out

-00

through

-15

No

conn.

for version

-16

22

4

ohmPASpeaker

-00

through

-16

23

Mic

Key

In

-00

through

-16

24 HF

Mic

Key

-00

through

-16

25

Comm

1

Mic

Key

-00

through

-16

26

Comm

2

Mic

Key

-00

through

-16

27 Comm1Mic Audio

-00

through

-16

28

Comm2Mic

Audio

-00

through

-16

29 Nav

2

Audio

-00

through

-16

30

ADF Audio

-00

through

-16

31

DMEAudio

DMEAudio for

versions

-00,

-01,

-03,

-04,

-06,

-07, -12, -13,

-15

and

-16.

ADF #2

Audio

for versions

-02, -05,

-11

and

-14.

No conn.

for versions

-08,

-09

and

-10

32

Headphone

Out

-00

through

-16

FIGURE

2-8

FUNCTIONS

FOR

066-1024-00

THRU

-16

Rev.

2,

June,

1976

Page

2-11

KING

KMA

20 /KR 21

MARKER BEACON

RECEIVER/

TSOLATION

AMPLIFIER

SECTION

III

OPERATION

3.1

MARKER

BEACON(KMA20

AND

KR21)

Marker

beacon

receivers

are

used to

provide

accurate

fixes by

informing

the

pilot

of

his

passage

over

beacon stations

located on

airways

and

ILS

approach

courses. Three types

of beacons are

used.

They

are the

inner

marker,

the

outer marker

and

the middle

marker.

The

outer,

middleand inner markers are

used

in conjunction with the radio

instrument

landing

systems.

The

outer

marker

is

normally

positioned on the

front

localizer

course

near

the point

where

the glideslope

approach

path intersects

the minimum

inbound

altitude

after

the

procedure

turn. Distance

from

the

airport will

vary

from

4

to 7

miles.

Radio

frequency

from

the

marker

is

projected

vertically

in

an elliptical cone shaped

pattern.

The marker

signal

is

modulated

at 400Hz

and

is

keyed

to emit dashes at a

rate of two

per

second.

When

passing

the

outer marker

the

blue light will flash "on/off" at

a

two

per

second rate

and the pilot will

hear

a series of low tone

dashes.

The middle

marker

is

normally located

on the front localizer course

about 3200 feet

from

the

approach

end

of

the

ILS runway.

The radiated

pattern

is

similar

in

shape

and

power

to the

outer

marker. The middle

marker

signal

is

modulated with 1300Hz and the

modulation

is keyed

to

identify by

alternate

dots

and

dashes.

When the KMA

20

(KR 21)

equipped

aircraft

passes

the

middle marker

the pilot

hears

a medium

pitched tone in a

series of dots and

dashes

and the amber light

flashes

synchronously

with

the

tones.

The

inner

marker

is located close to the end of the

runway.

The

beacon

transmitter

and

antenna

are

designed to

project

a cone

shaped

pattern of 75MHz

energy, vertically.

The

radio

frequency

output of the

transmitter

is modulated with an audio tone of

3000Hz.

An

aircraft

equipped

with

the KMA

20

(KR

21)

will

receive a 3000Hz

tone in headphone

or

speaker

and

the white

lamp will be

lighted

while

over

the

station.

The

inner marker

is

used

to

indicate a

point

approximately

1500

ft. from the

runway

and if on

proper

glide

path the

altitude

above the

runway

should

be

approximately

100

feet.

The

marker

beacon

function in the KMA 20 provides the

pilot with

audio

switching

control

and the

Hi-Lo

Switch

in

the KR

21

and

KMA

20 provide

sensitivity switching control.

Many

marker receivers provide

only a

"low sensitivity" position. The effect of the high

sensitivity

position

is

to

greatly

enlarge

the size of the

cone shaped

"area

of

indication"

above

the

station.

An

aircraft

flying at

high altitude or

slightly off

course

may fail

to

receive

the signal

when in the low

sensitivity

postion.

It is

suggested that the KMA 20

Rev.

1, August,

1972

Page

3-1

KING

KMA 20/KR

21

MARKER BEACON

RECEIVER/

ISOLATION

AMPLIFIER

marker

sensitivity

switch

first be

placed

in

high

sensitivity

position

until aural and/or

lamp

indication

is

received.

The

control

switch may be turned

to low

sensitivity

to

reduce

the

duration

of the

indication

and to obtain

a

more accurate

reading of

passage

since the

signal

appears

to

build

and fade

faster

on low

sensitivity.

The

marker

audio

may

now

be turned

off to obtain the

exact

time

of

center passage

from

the light only, since the

imminence of station

passage has

already been indicated. This

suggestion is

especially

appropriate if

he is involved

in

radio

com-

munication with

approach

control

or tower at that moment.

The

high

sensitivity

position may be used to

effectively

give the pilot

an advance indication

that

he

is approaching the outer

marker.

In

order

to expidite the

ILS

approach the pilot may wish

to

retain

higher speed until

he is

nearby

the

outer

marker

inbound.

With

the KMA

20

(KR

21) marker

in high

sensitivity position

the aural tone will begin

about

one

mile

from

the outer

marker. At

this

time, the

pilot

may switch the KM.A

20

(KIl 21)

marker

to

low

sensitivity

and reduce

engine

power for

final

approach

speed,

also

retrim

and perform

cockpit checks. He is

then

prepared

to

begin descent when

the

marker

indicates

actual

passage

over the

outer marker

and

the

glideslope

is intercepted.

3.2 IsotATION

AMPLIFIER

(KMA20)

Both

transmitting

and

audio

distribution functions

of the

Silver Crown

radio system

are

controlled

at the front panel of the KMA 20.

Basically

the

functional controls

consist of a microphone

selector

switch and

receiver

audio selector switches.

The microphone

selector switch performs

two tasks. It

routes

microphone keying

and

audio

information

to the appropriate destination

and

secondly,

it switches the output

of

the isolation

amplifier to one

of

two

speakers.

In

the

COMM 1

or COMM 2

positions,

microphone

information

is rounted to

the appropriate transmitter.

In the

HF position

of

the

International

model,

this

information

is

routed

to the

high

frequency

transmitter.

Likewise,

when the

TEL.

position is

sel-

ected, the

keying

and mic audio

is

routed

to

KT 96

King

phone in the

-12

version. In these three

positions

the isolation

amplifier

output

is

fed

to

the

cockpit

speaker.

The EXT position on 00

/07

provides

the

pilot

with

several

capabilities

depending on the option made

at

installation.

In the

EXT position, the

output

of the amplifier

is normally connected to

a

"ramp

hail" speaker or

alternately

to a

passenger

address

system. Should

one

of the

receivers

be

select-

ed in this

mode, the

audio will

be

heard

in the EXT speaker

until the

microphone

is keyed. When

the

microphone is

keyed,

the

receiver

audio

is

muted

and

the

microphone

output

is

fed to

the EXT

speaker output.

The

EXT

position on 09/11

provides

the

pilot

with

a

"ramp

hail"

function. And an added 4 ohm

out-

put is provided for

use as

a passenger

address

system.

A

series

of

toggle

switches

control

the

audio

inputs to

the

isolation amplifier.

Each of

these

con-

trols

can

be

switched

from the

center

off

position

to connect each

receiver's

audio

tothe

input

of

the

isolation

amplifier

which

then routes the audio to

the

speaker

output

in the "up"

position

or

to

external headphones

in the "down"

position.

In

the

PilONE

position,

receiver audio

completely

bypasses

the amplifier

and the

KlVIA 20 performs

onlyabypass

switching function.

Since individual

control of the

receivers is provided,

the pilot may

listen to

one receiver

with

the speaker

while

the

co-pilot

could

monitor another

receiver

utilizing

headphones.

One

non-switched

audio

input

has been

provided which

can

be

used

for audio

signals

that are

not

to be

switched,

as

Hadar

Altimeter

Au

dio

and

the ring

signal

from the

King

KT

06

KLng Phone.

Page

3-2

Hev. 2,

June, 1976

KING

KMA 20/KR 21

MARKER BEACON

RECEIVER/

ISOLATION AMPLIFIER

KN-70

LOAD JUMPER

JUMPER PINS AS

INDICATED FOR

GIVEN

NUMBER OF

EXTERNAL

LOADS

EXTERNAL

GLIDESLOPE VOR/LOC

LOADS

DEV

FLAG DEV FLAG

1NTERNAL WIRING D)AGRAM

27.5 V ONLY

M

F

KK

NN

ONE

H

B PP

TT

C

UU

XX

M KK

NN

TWO

NONE

THREE

NONE

_A

3

PRE-RFEGURLATOR

030-006Ì-00

Pi73 73 Pl72

030-OO6l-OO

275V

OPERATION

NAV

COMM

..

ANT

'

ANT.

J201

P2OlO30-2|O5-OO

PARTOF P70l

PA?TOF

J70l

030-2106-01,

I

+27.5VDC

A

+l3.75VDC

¯

X

STATOR D

t'

go

C

W

STATOR

E

N.C.

O

C N.C.

030-206

V

STATOR F

LL

i

,

C

SOLDER

STATORG

e

-

PARTOF

PARTOF Pl7\

030-2101-03

LUG IN

ROTOR C

(A/C)

J l7l

SPKR

GROUND

CONNECTOR

R,0TOR H

PARTOF

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OF

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PART OF PARTOF

42

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J70l

P70l

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LAMPD1M'R(13.75V)

33

AIRFRAME GNU

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t-

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LAMPDIM'R(27.5V)

38 20

A/C 3USS

27.5Vt‡16AWG

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INST

LIGHT DIMMEl

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FLAG

WW

R

J3.75V INPUT

IS

N.C.!NST

LIGHT DIMME

q

JJ

27.5V

(

SWITCHED)A/C

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KN

70

w

T

†

NA

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(ILS

SWITCHING

MATRJX)

A/C BUSS

27,5

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550

i------

Ty

VOR / LOC

×

VOR

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OUT

2

AIRFRAME

GROUND(N 16 AWG)

INDICATOR

L__

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CONVERTER

^^

.!MHz CONTROL

21

SPEAKER

OUTPUT

-G.S.FLAG L

GLIDE

^

.3MHz CONTROL

6

AUX

AUDIO#l(NO CONNECTION)

FF

+G.S.FLAG

F

SLOPE

E

.5MHz CONTROL

e

KX l70

34

COM

500-

OUTPUT (COMI)

-

8

RE CVR

.7MHz CONTROL

NAV 500 OUTPUT

(NAV I)

+RIGHT

P e

COMM

=

4LEFT UD

IDMS

HCz CONRORLOL

AA AA

Dllo3NNO

CCONNNNEECCT

ONN

---PP

IO9MHzCONTROL

AUXAUDIOi‡4(NOCONNECTION)

J

I2

l6

---

UU

i 1

0 MHz CONTROL

A

MIC KEY

(

COMM l)

EE

+

UP

S

N

ll I MHz CONTROL

[3

^0

ÍMic

AUDIO(COMMI)

+DOWN

T

i4

39

I

M

ILS ENERGIZE

2

DME

MHz"A"

-

LAMPDIM'R

(l3.75V)

*¿Cs

----

H

DD 1

2

L

LAMPDIM'R(27.5V)

---

C

23

FOR

REFERENCE PHASE

21

a

U

TESTING

VARIABLE

PHASE

RR J

702

P702O30

0005-00

25

"

"D"

ONLY

vy

GLIDE

"

"E"

SLOPE

26

TO

ANT.

27

DME KHz

"A"

i

)

REMOTE

¯¯

28 a

DME

--

29

" "

"C"

3 C

"

"D"

3

I

"

"E"

32

DMESWITCHING COMMON

FIGURE

2-5

KMA

20

INTERCONNECT

DIAGRAM

(27,

5V)

(DWG.

NO.

155-1075-00)

llev.

1,

August,

1972

Page

2-9

KA 39

(07HO4

l-O

I

)

PRE-REGULATOR

FOR

27.5V

OPERATION

+

27.5VDC

A

AC

i

+I3.75VDC

Î

B

Ë-

N.C.

O O

N.C.

(A

C)

(A C)

kl6AWG

16AWG

050-006f-OO

PJ72

I

dl72

JI73

IPl73

030-0061-00

030-OO35-OOP40l

OI

GLIDE

COMM

i

NAV

SLOPE

ANT,

ANT.

ANT,

KM A

20

INSTALL JUMPER BETWEEN

PINS

PART OF

PART OF PART

OF PART OF

030-2002-00

P30l

J30l

BANDS

IF RAMP HAI.LERlSETUSED.

030-2|Ol-03

Pl7|

J 7l J,7l Pl7l

030-2lO-03

(l3.75V)

LAMP

DIMMER

NC.

LAMP DIM R (l3.75V)

F

J2Of

A/C

BUSS

27.5V

(#)6

AWG)

20

3383

LAMPDIM'Rí275V)N.C

LAMPD\M'R(27.5V)

E

P20l

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4 5

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29

15 30 7 31 l9 20 2f

22

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KR

17

SWITCHED A/C (:l‡l6AWG)

SWITCHED A/C

POWER

[3.75V INPUT

C

CONNLECTORNHOUSING

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---

--

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v

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MHZ

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AIRFRAME

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DME

500-INPUT

RAMP

HAILER

8

SPEAKER

GROUND

^

I•

7

N

42

.5 MHZ CONTROL

VOR

INST LIGHT DIMMER

275V

SPEAKER

OUTPUT

COMM

e

R

.7 MHZ

CONTROL

INST LIGHT

DIMMER

(13.75V)

ADF

500

-

INPUT 9

S

I LS

N.C.

COM

500-OUTPUT (COMM

2)

NAV

.9 MHZ CONTROL

-

1

UN

IT

A/C BUSS

27.5V ‡120AWG

NAV

500^OUTPUT

(NAV2)

UNIT

(08 MHZ

CONTROL

W

(09

MHZ

CONTROL

X

AUX AUDlON

I

(NO

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CONTROL

36

l3

V

HF

5002

INPUT

AUX AUDIO‡‡

2

(NO

CONNECTÍON)

¡4

Ill MHZ

CONTROL

U

AUX AUDIO*l

3

(NO CONNECTION)

37

4

ILS

ENERGlZE

AUX AUDIO#

4

(NO

CONNECTION)

g

+LEFT DEFLECTION

HF MIC KEY MIC KEY (COMM 2)

TO

g

+RIGHT DEFLECTION

HF MIC

AUDIO MIC AUDIO

(COMM2)

I

AUTOPILOT

+UP DEFLECTION

L

30

COUPLER

DOWN

DEFLECTION

M

'.

DME

MHz A

--

22

MIC,

"

"C"

"D"

24

25

TO

26

REMOTE(e

DME KHz "A

27

NOTESI

DME

li

a

ligu

l.UNLESS NOTE'D,WIRE

SIZE IS‡i22AWG

MINIMUM.

28

"

"C"

2.ALL ANTENNA COAX IS

RGS8 A/U.

29

3.KN-70.DASHED

LINES DENOTE JUMPERS

TO

"

"D"

30

INTERNAL

LOADS

WHEN

EXTERNAL LOADS

ARE

"

"E"

3\

NOT USED.(SEE

CHART).

4. USE

JWl6AWG TO INTERCONNECT EQUlPMENT

¡

DME SWITCHING COMMO

32

155-1075-00 (R-I)

POWER

GROUNDS.

KING

KMA

20/KR 21

MARKER

BEACON/RECEIVER

ISOLATION AMPLIFIER

KN-70

LOAD

JUMPER

JUMPER PlNS

AS INDICATED

FOR

GIVEN

NUMBER OF

EXTERNAL

LOADS

EXTERNAL

GLIDESLOPE

VOR/LOC

LOADS

DEV

FLAG DEV FLAG INTERNAL WIRING DIAGRAM

13.75

V ONLY

M

F

KK NN

ONE

H

B

PP

TT

C

UU

XX

M KK

NN

TWO

H

NONE

THREE NONE

NONE

030-006l-00

Pl73

73

Pl72

030-0061-00

NAV

COMM

J

201

P20

I

030-2|O5-00

PART

OF P70I PA

IT OFJ701

ANI

ANT. I

030-2106-01,

-

J

201

STATOR

D

t'

W

STATOR

E

P2OlI2

3

030-2061-00

STATOR F

V

LL

SOLDER

STATOR G

MM

PAR

OF

PART OF

PI71

030-2|Ol-03

LUG IN

ROTOR C

CONNECTOR HOUSING

Y

a

CC

SPKR

GROUND

ROTORH

PARTOF

PART OF

PARTOF PARTOF

42

Z _,,

BB

J

701

P701

p

7|ay

+TO

LAMPDIM'R(l3.75V)

33

AIRFRAME

GND#20 AWG

+

FROM

Y

LAMPD1M'R(27.5V)

38

20

A/C

BUSS

[3.75Vi‡16

AWG

INST LIGHT

GND

u NW

JNST LIGHT DJMMER (13.75V)

-VOR

FLAG R

¯

17

si

9

JJ

13.75V

(

SWlTCHED)

+VOR

FLAG

,,

K

N-70

w

.o

T

.N

+I

V{lLS

SWlTCHING MATRJX)

A/C BUSS

13.75V ‡‡2OAWG

KP

I-550

VOR / LOC

x

VOR

/LO

C OUT

SIGNAL OUT

2

AIRFRAME

GROUND(4* l6

AWG)

INDICATOR

L

CONVERTER

^^

MHz CONTROL

3

21

SPEAKER OUTPUT

GG

-G.S.FLAG L

GLIDE

^

.3MHz CONTROL

6

AUX AUDIO#l(NO CONNECTION)

HF

500-

I

+G.S.FLAG

F

SLOPE

E

.5MHz CONTROL

-

COM

500^

OUTPUT (COM

I)

- --

B

RE CVR

.7MHz CONTROL

NAV

500-OUTPUT (NAV I)

+RIGHT

P g

CO

MM

36

EE

.9MHz

CONTROL

AUX AUDj0#2(NO

CONNECTION)

HF

MIC KEY

LEFT

U

10

NAV

37

D

LOS MHz

CONTROL

ir

UNIT re

AUX AUDIO 43(NO

CONNECTlON)

HF M1C AUDIO

---

PP IO9MHz

CONTROL

AUX AUDIO N4

(NO

CONNECT]ON)

J

[2

16

-- UU

Y

I O

MHz CONTROL --,

MIC KEY(COMM I)

+

UP

N

l3

40 I

I

EE S i i I

MHz CONTROL

1

MIC AUDIO (COMMI)

+DOWN

T 14

39

Q

M |LS ENERGIZE

22

DME

MHz"A"

-s

K

|

LAMPDIM'R(13.75V)

_-

H

1

LAMP

DIM'R(27.5V)

23

L

.l.

FOR

(

REFERENCE PHASE

---

C

21

U

¯

TESTING

RR

J702

P702O30-OOO5-00

"

"D"

ONLY

.VARIABLE PHASE

GLIDE

25

"

"E"

SLOPE

26 a

TO

ANT-

27

DME KHz

"A"

a

)

REMOTE

28

"

"B"

DME

-

29

"

"C"

b

30

'"

"

"D"

3l

"

"E"

|

32

.

DME SWlTCHING COMMON

,

FIGURE 2

-4

KMA

20

INTER CONNE

CT DIAGRAM (13.

75V)

(DWG.

NO.

155-1074-00)

Rev.

1,

August, 1972

Page

2-7

030-OO6l-OO

Pl72

I

JI72

JI73

IPl73

030-006|-00

030-0035-00P401

J40I

j

l

GLIDE

COMM

i

NAV

SLOPE

ANT

ANT.

KM A-20

(

INSTALL JUMPER BETWEEN

PINS\

PART

OF PART OF PART

OF PART

OF

¯

030-2002-00

P30!

J30\

\

8 AND

9 IF

RAMP

HAl.LER IS

T

USED.

)

030-2|O!-03

Pf 7\ J 7 i J

i7l Pl7\

030-2|Ol-03

LAMP

DIMMER (13.75V)

p

LAMP DIM'R

(13.75V)

F

A/C BUSS

|3.75 V(4tl6 AWG)

20

3383

LAMPDIM'R(27.5V

LAMPDIM'R(27.5V)

E

5

4 5

6

\3 f4 16 24 l2

2527 Il

23 2826 29 [5 30 7 31

l920

21 22 89103218 (7

¯

A/C GROUND

H

MKR

17

SWITCHED

A/C

(#l6AWG)

SWITCHED A/C

POWER

13.75V

INPUT

C

SPARE

a

A NT.

\3.75V

INPUT

27.5V INPUT

AMBER

LAMP AIRFRAME

PWR

GROUND(NI6AWG)

IS

N.C.

A

..

BLUE LAMP

HEADPHONES

-A-

2!

3

VOR/LOC

SIGNAL

OUT

D

.

REMOTE

SOLDER

LUÜ

.!

MHZ CONTROL

WHITE LAMP

OPTION

AIRCRAFT

SPEAKER 4

KMA-20

6

8

17 ialin

A v

gy

.3 MHZ CONTROL

ni"CIIU

DME

500

-3-

INPUT

RAMP HAILER 8

^

T

SPEAKER

GROUND

^ · ·

7

N

42

.5

MHZ

CONTROL

VOR

SPEAKER OUTPUT

COMM

e

--

.7

MHZ

CONTROL

ADF

500

^

INPUT

9

S

I LS

NAV

.9

MHZ

CONTROL li

:-

COM

500

-0-OUTPUT

(COMM 2) (O

T

UN I I

31

UNIT

108 MHZ CONTROL

NAV

500^

OUTPUT

(NAV2)

35

ll

W

109

MHZ

CONTROL

X

AUX AUDiO‡‡

I

(NO

CONNECTION) IIO

MHZ

CONTROL

36

y

lli MHZ CONTROL

-

INPUT AUX

AUDIO*l

2 (NO

CONNECTION)

4

U

37

ILS

ENERGlZE

AUX

AUDIO

*l

3

(

NO

CONNECTION)

4

AUX AUDIO# 4

(

NO CONNECTION)

6

+LEFT

DEFLECTION

Y

MIC

KEY (COMM 2)

TO

g

+RIGHT DEFLECTION

'.

4n

AUTOPILOT

+UP

DEFLECTION

3|O

MIC AUDIO (COMM 2)

L

!

39

COUPLER

DOWN DEFLECT]ON

M

DME MHz "A"

22

-e

" "

"B"

23

MIC.

" "

"C"

e n

.

nD"

2 4

"

"E"

25

TO

26

REMOTE

(

e

DME

MHz "A'

27

NOTE'SI

DME

a .ngu

l.

UNLESS

NOTE'D,WiRE

Sl1E

IS ‡f 22 AWG MINIMUM.

s

28

u

"C"

2.ALL ANTENNA

COAX IS RG58A/U.

I

29

3. KN

-

70.

DASHED

LlNES 1)ENOTE JUMPERS

TO

"

"D"

30

INTERNAL LOADS

WHEN EXTERNAL LOADS ARE

"

"E"

31

NOT USED. (SEE

CHART).

DME SWITCHING COMMON

32

PIN FUNCTION

-08

-09

-10

-11

1

A/C GND

SAME

2

INST.

LIGHT

GND

SAME

SAME SAME SAME

3

INST.

LIGHT

DIM'R.,

13.75VDC

SAME

4

A/C PWR

SAME

SAME SAME

SAME

5

No

Conn.

SAME

6

COMM

1

SPKR

SAME

SAME SAME

7

COMM2

SPK SAME

SAME

8

EXT.

RAMP

HAIL

SPKR

LD. SAME

SAME SAME.

SAME

9

RAMP

HAIL 89

SAME

SAME SAME SAME

10

-

A/C

SPKR

42 SAME

SAME

SAME SAME

11

MIC AUDIO IN SAME

SAME SAME

SAME

12

HF MIC AUDIO SAME

SAME SAME SAME

13

HF AUDIO

IN NO CONN.

NO

CONN. HF

AUDIO IN

HF

AUDIO

IN

14

COM

1

AUDIO SAME

SAME

15

COM2AUDIO SAME

SAME

SAME SAME

16

NAV

1

AUDIO SAME

SAME SAME SAME

17

MARKER

ANT.

SAME

SAME SAME

18

MARKER

ANT. GND. SAME

SAME

SAME SAME

19

WHT

LIGHT

OUT SAME

SAME

20

BLU LIGHT OUT SAME SAME

SAME

21

AMBER LIGHT OUT

SAME

22

PA 42

SAME SAME

SAME

23

MIC KEY

IN SAME

SAME

24 HF MIC

KEY SAME

SAME

SAME SAME

25 COM1MIC

KEY SAME

SAME

SAME SAME

26 COM 2 MIC

KEY SAME

SAME

SAME SAME

27 COM1MIC

AUDIO

SAME

28 COM

2 MIC AUDIO

SAME

29

NAV 2 AUDIO SAME

SAME

SAME SEME

30

ADF

AUDIO

SAME

31

DME

AUDIO

NO

CONN.

NO

CONN.

NO CONN.

ADF

2 AUDIO

32 HEADPHONE

OUT

SAME

SAME SAME

FIGURE

2-8B

FUNCTION

FOR

066-1024-08

thru

-11

(ETVVGr.

PIC).

696-1805-00)

Rev.

1,

Atuggist, 1972

I'age

2-15

KMA 20

VERSION::

066-

-00

ERU

-07

FUNCTION

-00

-01

-02

-03

-04 -05 -06

-07

1

A/C

GND'

gr

4

SAME SAME

SAME SAME SAME

SAKE SAME SAME

2

INST, LIGHT

GND SAME

SAME

SAKE

SAME

SAKE

SAME

3

INST.

LIGHT DIM'R.

13,75VDC SAME

SAME

SAME SAME

SAME

4

A/C PWR

Àssä

SLAÊ

SAME

SAME SAME

SAME

S

NO

CONN.

SAME SAME

SAME

6

88R-4-GBER

SABE SAME

SAME

SAME SAME

SAME

7

SGM-a-ZZEÐe

SAME SAKE

SAME

SAME SAME

SAKE SEME

SAME

8

EXT. RAMP HAIL SPKR

LD.

SAME SAME

SAME

SAME SAKE

SAME

9

RAMP

HAIL 89

SAME

10

A/C

SPKR

49

SAME

SAKE

SAME

SAME SAME

SAME

11

MIC

AUDIO IN

SAME . SAME

SAME

SAME SAME

SAMË

SAME

12

SAME

SAME SAME

SAME

SAME SAME

SAME

13

* *

* *,* * *

NO CONN. HF

AUÙIOINHF

AUDIO

IN

NO

CONN,

HF

AUDIO IN

HF AUDIO IN

NO

CONN. HF AUDIO.IN

14

COM

lå a-, SAME

SAME

SAME SAME SAME

SAME SAME

SAME

15

COM

2 aWÐEG

k

j

SAME

SAME SAME

SAME

16

NAV

1

AUDW

k

yv~f

4

SAME SAME SAME

SAME

17

MARKER

ANT.

SAMÉ SAME

SAME

SR4E

SAME

18

MARKER

ANT.

GND,

SAME SAME

SAME

19

WRT-LIGHE-9UT

SAME SAME

SAME

20

WWhe-tf@HT-00T

SAME

SAME SAME

SAME

SAKE

SAME

21

AMBER-tTORT-BUT

SAME

SAME SAME

SAME

SAKE

SAME

22

PA-4

SAME

SAME SAME

SAME

23

MIC

KEY IN

SAME

SAKE SAME

SAME

24

ßÐ-4G£rõëiY

SAME

25

COM

1

MIC KEY

SAME

26

COM 2

MIC KEY

SAME SAME

SAME

SAKE

SAME

27

COM

1

MIC AUDIO

SAME SAME

SAME

SAME SAME

SAME

28

COM

2 MIC

ADDIO

SABE

SAKE SAME

SANE

SAKE

SAME

29

NAV 2 AUDIO

SAME SAME

SAME

30

ADF AUDIO

SAME SAME

SAME

SAME SAME

SAME

3\

* ***

* * *

f4 DME

AUDIO

DME

AUDIO

ADF

2 AUDIO

DME

AUDIO

DME

AUDIO ADF 2 AUDIO DME

AUDIO DME

32

HEADPHONE OUT

SAME SAME SAME

SAKE SAME SB4E

SAME

FIGURE

2-8A

PIN FUNCTIONS

FOR

066-1024-00

thru

-07

(I39VCI.

fšCI.

696-1804-00)

Rev.

1,

JLugpast,

1972

I>age

2-13

030-0061-00

OR

030-0101-00

OR

030-0061-00

Pl73

P173

NAV

-

ANT

030

0061-00

OR

030-0101-00

OR

030-0061-00

P17

P172

COMM

ANT

030

2101-06

030

2061-00

030-2101-04

030-2146-00

Pl7

P/O

P201 P20 .

P/O

P171

P/O

9651

-

SPEAKER OUTPUT

7

---

SPEAKER

OUTPUT

--ONE

MHE MO 14

34

--COMM

5000

OUTPUT

(COMM

2)--

15 14

---COMM

5002 OUTPUT (COMM

1)--

3A 23

--DME

HRz M1 15

35

--NAV

5000 OtfrPUT

(NAV

2)----

29

16

--NAV

5000

OUTPUT

(NAV 1)

35

24

--DME

MHz M2 16

39

MIC

AUDIO (COMM

2)

28 27

MIC AUDIO

(COMM

1)

p

39

25

--DME

MHz

M3 17

K

40

-MIC

KEY (coMM 2)

26

25

MIC

KEY (COMM

1)

9

40

27

--DME

KHz KO

32

N

X

5

-

50KHz ILS

19

WHITE LAMP

SEE

NOTE

14

""¯

28

--

DME Hz K1

33

22

-

DME MHz MD

-

20

BLUE LAMP

-

29

--DME

Hz K2 3A

23

-DME

MHz

MI---

21

AMBER

lAMP

(SEE

NOTE7

30

--DME

Hz

K3

35

5

24

-

DME

MHz

M2---

22

Au PA

SPEAKER

31

--DME

50KHz 36

25

--

DME

MHz

M3

K

5

NON-SHITCH

500 ohm INPUT

.

K

32

--

DME SWITCHING COMMDN

22

27

--

DME

KHz KO

INc

M

2

INST

LIGHT

DIMMER-

13.75VDe X 5

--

50KHz

ILS-NC

K

28

-

DME

KHz

Kl---

3

INST LIGHT DIMMER

DœMNT

L

42

--

SPARE

X

29

-

DME

KHz

K2---

4

A/C POWER--#20AWG

30

--

DME KHz

K3--~

0

9

RAMP

HAILER 89(SEE

NOTE

IS)

5

36

---

AUX AUDIO

#1-----

NC

31

-

DME

50KHz

-,

8

SPEAKER

IDAD

COMMON

y

E

10

37

--AUX

AUDIO

#2-

NC

(NGTE

12)

32

-

DME SWITCHING

COMMON

---

NC

1

AIRFRAME GROUND #16nWG 15

-

Aux AUDIO

#3

-

Nc

2

--

+10.0VDC

G.S.

SWITCHING-

NC

10

AIRCRAFT SPEAKER

42

.

K

is

--

Aux aunto

es-

ac

6

--

0.1MHz CONTROL

--

12

HF MIC

AUDIO

7

--0.3MHz

CONTROL

-

24

HF MIC

KEY

8

-0.5MHz

CONTROL

-

13

HF

(RADIO

T£LEPHONE)

5002

INPUT

9

-

0.7MHz CONTROL

--

30

ADF

5000 INPUT

(SEE

NOTES

13 & 14)

10

-

0.0MHz

CONTROL

--

NC

31

DME

5002 INPUT

11

--

108MHz CONTROL

--

32

HEADPHONES

12

--

109MHz CONTROL

--

17

R

MIC

13

--

110MHz

CONTROL

--

18

16

--

111MHz CONTROL

--,

11

.

MK

36

--

AUX AUDIO

#1----

NC

23

EED

L1

14)

37

--

AUX AUDIO

#2-

NC

(NOTE

12)

15

--

AUX

AUDIO

#3---

NC

Kl(032-0008-00

14V)

16

--

AUX AUDIO

#4-

NC -01

28V)

21

--

POWER GROUND

#16AWG--

SFE

NOTE

7

FOR 27.5VDC

OPERATION

42

--

SPARE

P/O £1

C

33

--

INST LIGHT

DIMMER---13.75VDC

DIMMER

CONTROL

INST

LIGHT DIMMER

-

33

38

--

INST LIGHT DIMMER

INST

LIGHT DIMMER

38

20

--

A/C

POWER---#16AWG

13.75VDC

1

--

NAV 13.75VDC

INPUT

#16AWG-

A/C

POWER

26

--

NAV SWITCHED

13.75VDC-NC

17

--

COMM SNITCHED A/C EDWER

#16AkG

C C

REAKE

SWTCH

18

--

COMM13.75VDC

INPUT #16AWG

COMMSWITCHED A/C POWER #16ANC

---

17

CR 1

7-6021-00)

4

--

ILS ENERGI2E

COMM

13.75VDC INPUT #16AWG 18

19

--

ILS COMMON

---

3

--

VOR/1ßC OUT

13.75VDC

A/C EOWER

#16AWG-----

20

A/C POWER

5A

030-2106-01

P7C1

2A

AA

--

VOR/LOC

IN

NAV 13.75VDC

INPUT-

#16AWG•-

1

R

ILS COMMON

----....

#16AWG

POWER

GROUND 21

DD

ILS

ENERGIZE

---

SWITCHED

A/C POWER

NAV

SWITCHED

13.75VDC-

26

X

+10.0VDC

G.S.

3HITCilIll:;

2

A

0.11tile

tullTROL

6

E

--0.3MHz

CONTROL

7

-iŠMiiz

CONTRÕL

P

--

0.7MHz

CONTROL

U

--

0.9MHz

CONTROL

10

D

--

108MHz

CONTROL

11

J

--

109MHz CONTROL

12

N

---

110MHz CONTROL

13

T

--

111MHz

CONTROL

1'

K

Y

--

POWER GROUND (#22AWG)

030-2070-00

VOR/IDC OUT

---

3

N

3

es21

---

ILS

ENERGI2E--

4

FF

--

STATOR D

-ILS

COMMON-----

19

HH

--

STATORE a D

0

oso-2ost-oo oso-21er

ao

LL

--

STATOR F F

P/O

P1001 P/O P1001 P201

MM

--

STATORG

E

--POWER

GROUND

18

26

--•

+

VOR

FLAG

T

---ILS

ENERGIZE

3

10

-- -

TOR FIAG

_q

CC

--

ROTOR C

B

BB

--

ROTOR

H A

VOR/LOC

IN

1

9

-

+

TO

t

K

2

29

---

+

raon

.

SS

--+

W

a.

11

A

ROWR

H Z

W

--

+

PRC11 X

i

27

ROTOR C

T

JJ

--

-

VORFMG T

N

NN

y

+

VOR FMG S

5

12

,

staron

o

aa

|

NOTE

5

28

STATOR

F

V

'¯'

O

4

13

STATOR E

,

K

L

-- -

G.S. FMG

V

n

29

STATOR D

X

r

|

Fy

+

G.S.

F1AG

U

23

+

LEFT

1

I

B

- -

NOTE

5

24

DOMHY

IDAD

,

m

EE

--

+

RIGHT

M

8

DUMMY

IDAD-#

NOTE

8

KK

+

LEFT

N

7

+

RIGHT

Ê

r

NOTE 5

-

O

I

UU

--S--

+

UP

P

ILS ENERGIZE U

M

-g

+

DOWN B

H

-

4

NOTE

5

L

c

-A

i

G.S.

FLAG FF

RR

--

REFERENCE

PRASE

FOR

G.S. FIAG GG

VV

--

VARIABLE PRASE

TUTING

i gg¡gi

NOTES:

1.

UNLESS NOTED,

ALL WIRES

#24AWG

HINIMUM.

7, 27.3VDC

OFERATION

2. ALL

ANTENNA

COAX IS RG58A/U.

EX175/XX 1755

3.

UNLESS

OTHERMISE

SPECIFIED,

ALL SYSTEM GROUNDS ARE AIRFRAME

GROUNDS.

P

P171

4. THE

KA47 MAY

BE USED 10 CONVERT

KIl75/KIl75B IttE

SWITCHING

OITTPUT

TO

GIANNEL

2 OUT OF

33

--

INST LIGHT

DIMMER-NC

SCODE DME'S. 38

--INST

LIGHT

DIMMER---27.5VDC

DIMMER

CONTROL

5.

KN70

JUMPER

P1NS

AS

INDICATED

FOR

REQUIRED

NUHBER

OF EXTERNAL IDADS.

20

--A/C

POWER #16AWG

7.5VDC

A/C PONER

EXTERNAL

GLIDES1ßPE VOR/LOC

2A

LOADS DEV FIAG DEV FIAG

17

--COMM

SNITCHED A/C EONER #16AWG

OUTPUT

INPUT

ONE

M

F

KK NN

18

--COB91

13.75VDC

INPUT

#16AWG--

A

H B

PP

TT

(1,

SA

CORTINUOUS)

C

UU XX

(5.0A

201 DUTY

FACTOR)

y

KA

39

G

TWO M NONE

KK

NN

1

--NAV

13.75VDC

INPUT

#16AWG--

B

---

H

PP

TT

..... (0.75A

CONTINUGUS)

THREE NONE

NONE NONE

6.

POWER BUSS

CIRCUIT

BREAKERS ARE

TO

BE MOUNTEDIN THE

AIRCRAFT BREAKER PANEL

OR

INSTRUMENT

PANEL SUCH TRAT THEY

WILL

BE

ACCESSIBLE IN

FLIGHT AND SAFE

FROM

PHYSICAL

IMMAGE,

KMA20

P/O

P201

10. RAMP

HAILER AND

AIRCRAFT SPEAKER RETURN

LEADS SHOULD BE

CONNECTED

TO

1 2 INST LIGHT

DIMMER-27.5VDC

DDetER

CONTROL

AT

KMA20,

RAMP

HAILER OUTPUT (Pin

9)

TO

BE TERMINATED

WITH 7.52

5

WATT

IDAD

3

INST LIGHT

DIMMER-NC

RES1STOR

WHENRAMP HAILER

15 NOT USED"

11. EXTERNAL

SWITCHING

CAPABILITY: COMM

-

PIN 17

-

NONE

8.

KN74

-

FOR ONE

INDICATOR JUMPER PINS 7, 8.

AND

24.

NAV

-

26

-

300MA

FOR TUD

INDICATORS

JUMPER

PINS 7

AND

8.

12. AUXILIARY

AUDIO #2 IS

INTERŒlM

MIC

INPUT

ON

KX175B.

FOR THREE INDICATORS NO

JUMPER REQUIRED.

13.

OPTIONAL

INTERCONNECT

FOR BOOM

MIC O

HEADSET

INSTALIATION.

9. KNGSDME INDICATOR (KI265) NGE SHOWN.

16.

IF STANDARD

3-WIRE

MICADPHONE

PLUG IS

USED, THE

FRAME

SHOULD

BE

INSULATED

BY

16.

REMOTE OPTION

FOR VERSIONS

-00/-15

(MARKER

LIGHT

OUTPUT)

WASHERS TO AVOID

INTRODUCING NOISE

INTO MIKE

AUDIO.

FOR

-16

VERSION

THE

lAMP

OUTPUTS BECOME:

PIN 21 has no connection

15.

KEEP

GROUND SEPARATE FROM

KMA

20

GROUND,

20 has no connection.

PIN 19

MARKER RADIO 5002

INPUT