Collins KWM-380 Owner's Manual

Collins

KWM-380

owner's manual

523-0769877-002217

2nd Edition, 1 January

1981

owner's

manual

Collins

KWM·380

Transceiver

Collins

Telecommun

ications

Products Division

Electronic

Systems

Group

Rockwell International

Cedar Rapids, Iowa, 52406

WARNING

THIS TRANSCEIVER, WHEN TRANSMIT­TING INTO

AN

ANTENNA EITHER DI-

RECTLY

OR

THROUGH

AN

ASSOCIATED

ANTENNA COUPLER AND/

OR

POWER

AMPLIFIER,

MAY PRODUCE

AN

ELECTRO­MAGNETIC FIELD NEAR THE ANTENNA
THAT

IS

IN

EXCESS

OF

THE OCCUPA-

TIONAL SAFETY

AND HEALTH ADMINIS-

TRATION (OSHA) MAXIMUM RECOM-

MENDED LIMITS.

introduction

This manual contains operating and instaliation information for
the

fully synthesized, all solid-state KWM-380 Transceiver. Full

coverage from

1.80000

to

29.99999

MHz is standard in the

receiver circuits. Transmission is limited to 1.800 to 1.999,

3.250 to 4.249, 6.750 to 7.549, 10.100 to 10.149, 13.750 to

14.599, 18.060 to 18.169 , 20.750 to 21.699, 24.890 to 24.989 ,

and 28.000 to 29.699 MHz about the Amateur Radio Service

bands. For earlier manufactured KWM-380's not

programmed
for expanded frequency coverage, Service Bulletin No 10 for
the

KWM-380 is available to enable transmission on these fre-

quencies. A pll synthesizer tunes

in

10-Hz increments either

manually or with

an

optional remote keypad control. Split vfo is
standard, as is the digital frequency display driven directly by
the microprocessor.

Because of the uniqueness of each individual station, the insta l-

lation

information found here is limited

in

scope. In-depth infor-

mation can be found in numerous

publications

commonly

referred

to

by amateur radio operators.

Test 'procedures

in

this manual require only simple test

equip-

ment to perform. The procedures are a guide in tracing mal-

functions to a functionally related

group

of circuit cards.

Detailed tests requiring laboratory-type test

equipment

and
schematic diagrams are included in the KWM-380 Transceiver
Service Manual, Collins publication

number

523-0769878,
available through Rockwell-Collins Amateur Products Distribu­tor

/Se

rvice Agencies.

1

specifications

Ph

ysical

Si

ze

...............................

......... 394

mm

(15.5 in) wide. 165

mm

(6.5 in) high, (does not

include

25

mm

(1

in) feet

normally attached) . 457

mm

(18.0 In) deep

Weight ...................................

21

.8 kg (

48

Ibs) max

Primary power ..........................

Strappable for: 105, 115, 1251
21

D.

220, 230, 240, 250 V

±5%,

50

to 60 Hz;

or

12 to 15

V

dc

. 120 W max

in

receive;

600 W max in transmit

Recei

ve

r

Frequency ......................

..

. 1.6 to 29.99999 MHz , tunable

in

10-Hz steps

Modes ..................................

..

USB,

lSB

, AM , and CW

Sensitivity (at antenna

terminals) ............

................. 0.5

jlV

or

better for 10

dB

(s+n)/n,

2.0 to 30.0 MHz; 1.0

jlV

or better 1.8 to 2.0 MHz

Se

lectivity (3-dB min

bandwidth) ............................

Selectable

8 kHz

*6 kHz

2.1

kHz

*1.7 kHz
*360

Hz

·140

Hz

If and image rejection .......

..

. Greater than 60

dB

·Optional filters

2

Intermodulation distortion .... -50

dB

or better for two

signals of -10

dB

mW each,

20

kHz apart

AGe ....................................... Audio output variation not

more

than 8

dB

for

4-J.N

to

200-mV open

circuit

rf input

variation

Audio output ......................... Not

less than 3.5 W into 4-

ohm

load, at 1 kHz, at not

more

than 10% total harmonic

distortion

Transmitter

Frequency

(

Comp

lete

coverage shown may

require installation of
KWM-380

Service

Line audio output: -10

dB

mW

nominal into 600 ohms
Frequency response:

300 to

2400 Hz with not

more

than 5

dB variation

Bulletin No 10) ...................... 160- through 10-m amateur

bands, tunable

in

10-Hz steps

"Future

amateur bands

160 m

80175 m

*"30 m
*"17 m
"*12 m

40 m

20

m

15 m

10 m

1.800- 1.999 MHz

3.500- 4.000 MHz

10.100-10.149 MHz

18.068-18.169 MHz

24.890-24.989 MHz

7.000- 7.300 MHz

14

.000-14.350 MHz

21

.000-21.450 MHz

28

.000-29 .699 MHz

3

MARS

±2S0

kHz

either

side

of

80 - 15 m

bands

, except 30

mand17m

bands

Modes .................................... USB, LSB, and CW

Output

paw

er.

....................... 100 W

pep

, nominal

In CW or ATTY, automatic

turndown

to 50 W after 10

seconds, 50

percent

duty

cycle, key down 15

minutes

,

max .

With

optional

blower

kit

installed, power is 100 W

continuous

; key down 1

hour

,

max, at 25 "C; 30 minutes,

max, at 50 "c for all modes.

Unwanted signal

suppression

Carrier ...................................

-50

dB

or

better

Undesired sideband ,

l-kHz

ref ............................... -55

dB

or

better

Harmon ics

(all) ..................... -40

dB

or

better

Mixer

products

..................... -50

dB

or

better

Third

order

distortion ...........

25

dB

below each tone of

two-tone test

Synthesizer accuracy
and

stability .............................. Accuracy within

±5

Hz after

10 minutes

warm-up

when

39.6- and 0.455-MHz

oscillators are set to within

±3

Hz

4

Stability within

±150

Hz over

temperature range of 0 to

50

°c

At

load ...

.......

...

........................

50

ohms, nonreactive. Full

power output with vswr of

2:1

or

less. Automatic power
output turndown with vswr
greater than 2:1.

Audio inputs

Microphone

..........................

Low

or

high impedance,

dynamic

Line ....................... .

..........

......

600

ohm , unbalanced ; 40-mV

input

sufficient for full rf

power output

5

INSTALLATION

unpacking

The

KWM·3BO may be

shipped

in two separate cartons,

depending

on the shipping

carrier

's requirements .

One

con·

tains the power

transformer

, the

other

contains the transceiver.

After

carefully unpacking the cartons, check to be sure no

ship·

ping

damage

is evident. Should any

damage

be apparent, save

the cartons and notify the

delivery

carrier

immediately to file

claim

for damage.

The

KWM·3BO is

shipped

strapped

for 115 V ac operation .

power transformer installation

If the power

transformer

has been shipped separately, it can be

quickly

installed in five steps. A 3/B-in open-end wrench, no 12

(3/B-in)

nutdriver , and a Phillips screwdriver are the

only

tools

needed .

• Using the screwdriver, remove

four

screws

from

the bottom

of the transceiver (near the

rubber

feet at each corner) and

slide the dust cover off over the heat sink.

• Remove the

front

one of the two PhillipS· head screws

secur·
ing the front panel braces to the sides of the chassis and tilt
the panel forward.

• Turn the

transformer

so terminals 1

through

B face the

front

panel. With the

nutdriver

, remove the

four

hexposts and

lockwashers

from

the chassis mounting

studs

in the right

front

corner

of the chassis and set the

transformer

over the

studs.

6

• Using the wrench and nutdriver, secure the

transformer

to

the studs with the four

lockwashers

and hex posts.

• Electrically connect the

transformer

to

the transceiver with

the two attached

polarized connectors. Reattach the

front

panel, then replace the

dust

cover. Be careful when replac-

ing the

dust

cover to avoid pinching or dislodging cables .

Figure 1 s

hows the

transformer properly mounted.

WARNING

Power Trensformer Ins/aile/

ion

FiQur9 1

primary power requirements

DO

NOT ATTEMPT

TO

CHANGE VOLTAGE

STRAPPING WHILE PRIMARY POWER

IS

APPLIED. ELECTRICAL SHOCK WILL OC-

CUR.

DISCONNECT

THE

PRIMARY POWER

CABLE FROM THE POWER SOURCE

OR

THE

UN

IT

FIRST.

ac voltage operation

The KWM-380

will

operate from various 50-

to

60-Hz voltages,

dependi

ng

on internal strappi

ng

connections.

As

shipped from

the factory, the KWM-380

is

strapped

for

115 V operation.

7

For i

nput

voltages listed, refer to figure 2 and strap T81 as

follows:

WIRE 105

115

125 210 220 230 240 250

BLACK 7 7 7 6 6 5 5

4

YELLOW

3

2 1

3

2 2 1 1

RED 6 5

4

3

2

2

1 1

Determine the average ac voltage at the primary power outlet
where the transceiver is to be used. Remove the chassis dust
cover and locate the protective cover plate near the left rear
corner as viewed with chassis upside down. Remove the cover
plate and reler to the preceding chart to make the connections
indicated

for

the voltage nearest the primary power outlet volt-

age. If the outlet voltage is

approximately

halfway between two

voltages listed, strap T81 for the lower voltage.

Figure 2 shows T81 correctly strapped for 105 or 240 volts.

8

SLACK

VI

OLET

STRAPPING

FOR

10~

V

AC

PROTECTIVE
COVER

PLAT(

Bl..ACII.

VIOLET

STRAPPING

FOR

240

V

AC

BOTTO'"'

lEFT

REAR CORNER OF'TlIANSC[lV£R

TBI

Strapping

lor

105

YOrrS

or

240

Yotts

Figure 2

TPA·H;~!-Oll

de Yoltage operation

The KWM·380 will also accept 12 to

15

volts de for

backup
emergency power. The primary power connector must be
strapped as shown in figure 3. Power requirements are nomi­nally 3 A

in

receive and

20 A in

transmit.

RENt (WIRING SIDE) VI

EW

OF

CABLE CONNECTOR

AC HIGH

~~~~~±=±:t

SAF

ETY GROU

Nl)

AC NEU

TRAL

I 10 0

==

AC CONNECTOR

-£~-]"

..

r=

. voe

9 9 II

8 10 0 12

=

(JUIllI'ER)

OC

CONNECTOR

TPA·16~4·011

Power Connector Str8pping

lor

AC

or

DC

Oper8tion

Figure

:3

operating

location

The normal operating location should be chosen

so

the trans-

ceiver is away from heat vents and normal airflow around it is

unobstructed. Do not lay objects

on

top

or against the sides. It

is especially

important

that the heat sink have a free flow of air

about it. An automatic turndown circuit will reduce the rf output

power if the heat sink overheats . This is for self-protection of
the power

amplifier output stages.

The AC-2808 Blower Kit is available for attaching to the heat
sink. This

blower supplies cooling air to permit normal opera-

tion

in

close quarters or high-duty cycle operation .

9

system inter

connections

Figures 4 and 5 show typical

hookups

. Tab le 1 lists the signal
parameters for ali front and rear connectors except the primary
and

rf

power.

For

phone

patch interconnections, 600-0 audio input (J2), ptt

(J9), and

4-8-0 speaker output (J10) connectors are available

on the KWM-380 rear panel. Refer to the phone patch

manu-

facturer's instructions for interconnect information.

10

180

U10""·

Transceiver Installation Connections

Figure 4

I I I (

Transceiv

er

and

Linear Power Amplifier Installati

on

Connections

Figure

5

Tabla

1.

Controls, Indicators, Connectors, and Signal Parameters.

ITEM

METER (switch)

ALe

ve

PF
PR

Meter

Function switches

MOX

vox

NB

PRoe

AGe

SLOW

DELAY

ew

SSB

FUNCTION

Selects signal

applied to meter during transmit.

Transmitter automatic

level control voltage.

00

not

exceed

59

alc level in transmit.

Collector voltage for final amplifier stage.

Forward

rf

power sampled at amplifier output.

Reflected

rl

power sampled at

amplifier

output.

In receive, indicates relative signal strength In '5'
units. (RI Input

Of

100

IJ.V

at antenna terminals

gives

S9 indication.) In transmit, indicates signal

selected by METER switch.

Selects related lunction when switch is in position.

Manually operated receive-to-transmit switching.
Places transceiver in transmit when pressed in.

Voice operated receive-to-transmit switching.

Ptl

switching also operable.

Noise blanker.

Speech processor.

Receiver automatic control.

(Switch must be

In

in

position to enable

AGe

function

.)

Selects slow AGC action in in position;

last

AGe

when out.

(AGe

switch must be in in pOsition

lor

lastlslow

action to be enabled).

Adjustments

lor

transmit-to-receive switching time

delay.

Delay between last key -

up

action and receive

mode.

Delay between

last microphone VOX input and re-

ceive mode.

11

Table

1.

Controls, Indicators, Connectors,

and

Signal Parameters (ContJ-

ITEM

GAIN

vox

ANTI
Frequency readout
Frequency control

switches

SYNC

LOCK

,(lett)

r(r

lght)
POWER
Tuning

knob

SPOT

VFO

A

12

FUNCTION

Adjusts levels at which receive-to-transmit switching
occurs.

Voice

or

line audio input signals.
Speaker-to-microphone signals.
Displays frequency in

IO-

Hz

increments.

Selects frequency increments affected by tuning
knob

. Continuous tuning for any increment with

roll-around at end limits.
I-MHz

increments.

Loads displayed frequency in

nonselected vfo reg-

ister to synchronize both

vlo

frequencies .

Dial lock prevents tuning

knob

from changing fre­quency when rotated. Release by pressing in any
increment switch.

I-kHz

increments.
100-Hz increments ,
10-HZ Increments,

Primary

power switch.

Frequency selection control.

(Provides 200 Incre-

ments per revolution for all except MHz steps

atl0
increments per revolution.) Works in conjunctiOn
with switches above

knob

.

In CW

mode

only, enables

SOO-Hz

tone to which
received CW tone is matched to spot transmitted
frequency to

exact received frequency.

Selects frequency-storage register.

A register . Transmit and receive on same fre-

quency.