Autek Research WM-1 SWR Instructions Manual

I

INSTRUCTIONS

WM1

SWR/WATT

METER

PRICE•

$2.00

A.

POWER

8 .

Rl'

HOOKUP

C,

OPERATtOI'I

D.

CALIBRAT10N

CONTF,NTS

•

E.

OPERATING

CAUTIONS

1'.

IN

CASE

OF

TROUBLE

3

...

G.

THEORY

-of"

OPERATION

11

.

TYPICAL

i'ERFORMANCE

CHARACTERISTICS

I .

',o/ARRANTY

J,

SERVICE

AND

RETUIUIS

K.

LATE

I'IOTES

Your n

ew

WHl

SWR

wattm

eter

has

been

tho

roughl

y

test

ed

t w

lce

b

efore

shipmen

t.

Please

read

the

instructions

carefully

for

b

esc

resultt

, and a

ave

th

em f

or

futur

e

reference.

A.

POWER

The

WH1

needs

+9

to

+1

8 vdo

at

approximately

15

ma.

Plug

the

115

vac

adaptor

into

the

jac

~

at

th

e

lef

t

rear.

Th

e

WH1

may

also

be powered frora a

battery.

A 9

vol

t

bat

t

ery

ls

marginal

,

but

usable

. The

first

ef

fect

of

reduced

voltage

le

that

tho

SWR

reading

cannot

reach

lnflnlty,

but

will

still

be

accurate

at

lower

readings

.

The

meter

wtll

typically

read

S>~

'

s

to

3• 1

with

B+

as

lov

as

8

volts

, and

accurately

lndlcate

po

~e

r

as

low

as

7

voles

.

In

220

volt

countries

obtain

an

AC

adaptor

locally

as

we

do

not

carry

theta.

If

using

small

batteries

you

may

want

to

clip

one

lead

to

the

LED

(does

not

vold

warranty)

since

the

LEO

oonsUJDea

about

2/3

of

the

power.

s: Rf

HOQKUP

Connec

t

the

tranemltter

to

the

co

ax

--onnec'tor

so

marked

. Connect

the

antenna

coax

or

antenna

tuner

to

the

~

outpu

t

connector.

(If

these

are

reversed,the

meter

reads

reflected,

not

Co

rw

a

rd.

POWer

and

the

SWR

reading

wil

l be

off

sca

l e .)

C.

OPERATION

Select

the

low

est

ran~e

sca

le

Cor power ln

use.

Select

average

or

PE

P.

PEP

stands

for

"pea

k-envelope-power

•

and shows

the

peak

output

power,

even

if

this

peak

lasts

only

a 'few m

illiseconds.

PEP

ls

me

asu

red

by

electronic

olrouitry

whi

ch

respo

nds

much

fas

t er

than

th

e

meter.

(The m

eter

takes

a

fr

a

ctio

n

of

a second

to

swing

to

t he

internal

olootr

onic

true

PEP

power.)

~ote

that

SWR

ts

oomputed

automattcall~

and

dis

pla

yed

directly

.

Unllk

e

vi

rt

ually

all

other

meters on

the

marke

t,

th

ere

is

no need

to

do a

full

scale

ad

justm

ent

or

co

mpu

te

5

WR

wi

th

a nomograph .

Any

variation

of

SWR

reading

with

power l

evel

is

due

to

a

small

voltag

e

drop

in

the

diodes

in

the

Rf

haad.(The

small

bo

x.)

This

phenom

ena

occurs

with

virtually

all

meters

in

t he

under

$5

00

claaa

. The

indicated

5WR

will

d

ro

p

notic

ea

bly

at

1/10

full

scale

, and

at

eve

n

higher

scale

readings

on

the

20

watt

aca

le.

However,the

meter

ls

usab

l e

!or

nulling

antenna

tuners

and

chec

king

ge

ne

ral

antenna

condition

at

powers

as

low

as

1/2

wa

tt

or

lower

.

USE

THE

LOWEST

RANGE

SCALE

THAT

DOES

NOT

PEG

THE

POWER

METER

FOR

HO

ST

AOa.JRATE

R

EADINGS

.

Wh

en

using

"PEP"

you

raay

be

su

r

prised

t o Clnd

ttui

t

PEP

reading

on

558

La

not

much

different

t han

the

PEP

or

AV

reading

with

"key-down•

CW

.

THIS

IS

NOR

MAL.

M

odern

5S8

tran811itt

ers

w

ith

corapression

and/or

ALC

are

peak-

PO

w

er

H11lted

on

558

and

CW

,

When

sending

a

strlng

or

dote

you

will

probably

notice

an

increase

in

PEP

(va

. keydown.)

This

La

due

to

a

slightly

smaller

droop

ln

trane~ltter

pOwer

supply

vo

ltag

e ,

yielding

increased

peak

power.

PEP

is

generally

used

on

SS

B, and

AV

i s

used

for

tuneup.

Switching

to

AVon

SSB

produc

es

a

noisy,

low

SSB

power and

SWR

reading.

The

PEP

feature

also

allows

you

to

comply wl.th

latest

FCC

rules

allowing

1500

watts

PEP

QUTPVT

on

many

bands and

for

moat

classes

of

llcen

sees

.

The

SWR

reading

in

the

PEP

position

will

be

accurate

for

reasona~ly conti~JOus

speech,

but

is

designed

to

decay

much

faster

than

the

PEP

power

reading.

This

allows

almost

instant

response

to

antenna

tuner

adjustments

when

talking

on

SSB.

Incidentally

,

try

this•

Transmit

a

contino

us

carrier

on

CW

(key

down

.) .

Note

the

power

reading

in

the

AV

position.

Then

switch

th

e

WM1

to

PEP

.

You

'

ll

probably

notice

a

sligh

t i

ncrease

in

PEP. No,

the

P

EP

detector

isn

' t wrong! y

ou'r

e

measuring

the

increase

in

PEP

power

caused

by

the

ti

ny

ripple

on

your

power

supply

voltage

!

Occasionally,

you

may

want

the

me

t

ers

to

decay

faster

when

switching

to

a lower r an

ge

scale.

Simply

switch

monentarlly

to

AV

, which

discharges

the

PEP

circuit.

D.

CALI

BRAII!li

Your

WM1

is

calibrated

using

an

air-cooled

I

KW

50

oM

%

0.1

OM

"driftless"

load

and a

special

technique

to

measure

power which

is

accurate

to

less

than

1/2

percent.

It

is

unlikely

you have

equipment

of

this

accuracy.

(Two

~4

instrumen

t s

can

disagree

by

as

much

as

10%.)

For

example

dummy

l

oads

commonly

used

by

hams

can

vary

from 3g

to

63

oMs

in

our

experience

,

even

though

specified

as

accur

ate t o

5%.

Worse

yet,

most

drift

10

or

more

ohms

wh

en

hea

t

ed

!

The

complete

calibratio

n procedure

is

shown

belo

w.

(Note

•

steps

1,

,3

,and 4

ma

y be do

ne

without

fear

of

d

egrading

factorT

accu

racy,

St

ep 1,

especially

, m

ay

h

ave

to

be

performed

occ

a

si

onal

ly

. )

1.

Wi

th

DC

power

app

l

ied

to

the

WM

1

(!.ED

lit)

,

but

your

transmitter

off,

mechani

ca

ll

y

zero

both

meters

with

the

front

-

panel

mete

r

screws

using

a

screwdriver

.

2.

Connect

the

remote

head

to

your

transmitter

and a

load

known

to

be

50

ohms

r

esistive

at

the

frequency

tranemitted.(lf

you

use,

say,

a 40

ohm

load,which

is

off

by

20~,your

power

calib

r

ation

would

be

off

by

201.

at

50

oMs

, and

SWR

would

not

read

correctly.)

YaJ

should

preferably

transm1c

on

40

meters

(7

mHz)

.

While

tranamittl.ng

CW

ad

just

the

trinvt~er

capacitor

in

the

remote

RF

head

until

SWR

reads

1•1

or

as

close

as

possible

. Use 20-200 waccs i f

possible.

3.

Reverse

coax

connect

io

ns

to

Che

RF

head,

so

chat

your

transmitter

is

co

nn

ected

to

the

output

and

the

load

is

connected

to

c

he

i n

put.

Disconnect

one

wir

e

going

to

che

S

WR

meter

to

av

oi

d

pegging

this

meter

.

You

'

re

no

w

rea

din

g re

fl

ected

pow

er

, which

is

much

more

sensitive

th

an S

WR

. Touch up

the

trimmer

to

yield

lowest

power

reading

.

'•.

Reverse

coax

connections

to

the

Rf

he!ld

agaln

so

that

the

transmitter

i.s

connected

normally

to

the

input.

Reconnect

the

wire

to

the

SWR

meter

.

Disconnect

the

load

from

the

Rr head

output,

leavlng

XOTHING

connected

co

che

RF

head

ou~put

coax

connecto~

,

not

even a

short

length

of

coax

.

Transmit

less

than

200

watts

CW

(no

linear)

and

adjust

the

SWR

trimpot

on

the

circuit

board

(see

drawing)

so

that

the

SWR

meter

reads

infinity

(full

scale

.)

Do

this

on

40

meters

if

possible

,

for

best

accuracy.

s. Connect

your

accurate

50

ohm

load

ns

in

seep

2.

Nith

a power

meter

of

known

accuracy

in

series

with

the

WHI,

adlust

the

PWR

trimpot

on

the

circuit

board

(see

<Jra••ing)

until

the

lvH1

reading

agrees

with

the

reference

power

meter

.

Be

sure

SWR

is

\ol

.

E.

OPERATING

CAU

TIO

NS

Never

run

the

WI-ll

at

all

SIVR

g

reat

er

than

'" l

with

pow

er

greater

than

300

watts.

This

could

possib

l y

burn

out

the

RF

head, which

is

not

covered

by

warranty.

These

limits

are

quite

conservative.

Your

linear

is

likely

to

arc-over

before

the

WML

is

damaged. However,

to

be

safe,

check

SWR

before

switching

on

your

linear

. Never

short

the

WMI

Rf

head

output.

This

could

melt

the

Rf

wire

in

the

head.

F. W

CASE

OF

TROUBLE

1 •

HEIER

DAtlACED

This

is

extremely

rare

.

Damage

is

not

always

visible

by

looking

at

the

unopened box .

All

shipments

are

insured.

Keep

the

orig

in

al

box and

packing

material

and

report

damage

to

the

shipper

(usually

UPS)

.

Once you do

this

, you

will

not

have any problems

collecting

.

We

do

this

for

you,

and

wlll

slllp

a

..

replr.cement upon r

ece

ipt

of

the

damaged equlpment.

2.

MEJE:R

!lEAD

.

POWER

OR

S1VR

READING

TOO

LOI~

Check

po

w

er

sourc

e.

Be

su

re

meter

has

a

DC

supp

l y

attached

as

ln

section

A, and

that

voltage

is

pr

oper

.

NoteoAC

adapto

rs

are

tested

by

the

manufacturer

,

not

by

us

. Shoul d you

receive

a bad

AC

adaptor

,

write

or

call

and

we'll

get

you o

ut

a good one

lmm

ed

lately.

Examine

the

RF

head.

tf

you've

shorted

the

head

output

the

wire

through

the

toroid

cay

have

overheated

.

Simply

replace

the

wire.

If

vou'

ve

subjected

the

head

to

high

SWR

at

high

power,

the

white

portion

of

the

trimmer

capacitor

may

be

cracked

or

singed

.

We

can

send

you a

replacement

for

$5

ppd

USA

.

If

you '

ve

shorted

any

RF

head board component

to

either

coax

connector

,

say

whil e

adluscing

the

trimmer

, you '

ve

probably

blown

both

diodes

.

Replace

these

wlth

any

GERMAI'IIUM

dlode

,

available

at

Radio Shack. li\I34,1N270 ,

and

others

are

su

it

able.

llam

aga

to

the

RF

head,

especially

the

trlmmer

capacit

or

cnn al

so

be

caused

by

light

ning

. A

direct

strlke

ls

not

necessary.

Th

i s

ls

also

not

covered

by w

arra

nty

.

Again,

note

that

slmply

replacing

thcdamagecl compone

nt

and a minor

recalibrat

i

on

is

sufficient.

(Unless

the

toroid

or

33

ohm

resistors

are

damaged.)

3.

SWR

Rli:ADING

TOO

HIGH

/PO\vER

TOO

liT

Gil

a.

Be

suro

input

and

outpu

t

on

RF

head

arc

not

reversed

.

b.

Especially

lf

this

occurs

only

at

high

power

nnd

is

more

apparent

ln

PEP

position,

it

could

be

arcin&

(spark)

in

your

transmitter,

linear,

or

antenna.

c.

RFT

.

See

below. Cou

ld

also

cause

low

readings

.

This

may

indicat

e

RF

flowing

in

cables

or

power

connected

to

the

main

meter

box,

or

direct

RF

pi ckup. The

IVMI

ls

ex

tensive

ly

tested

in

a

high

POWer

RF e

nvi

ronment .

How

eve

r,

ex

treme

or

unusual

co

ndi

tions

might

e

xist

in

some

shacks

which

could

cause

a

problem.

(lve

test

at

I

KW

with

the

antenna

only

15

feet

a

way

with

no problem .)

Be

sure

th

e

meter

.

is

not

near

unshielded

feedlines

or

coils

carrying

power. The

top

of

the

antenna

tuner

or

line

ar

may

not

be

the

best

location.

If

readings

vary

as

the

main

meter

cabinet

is

moved

around

,

the

problem

is

probab

l y

direct

radiation

into

the

unit

.

Find

a good

location

or

reduce

the

radiation

fro~

the

source.

More

likely

ls

a ground

loop

.

If

the

~eter

reading

does

not

vary

when

the

mecer

is

moved

several

feet

,

suspect

ground

loops

.

Typica

ll

y,

transmitted

power

could

be

picked

up

by

the

house

wiring

and

flow

from

the

AC

adaptor

through

the

WHl

chassis

and back

to

the

remote

RF

head.(Using

a

small

battery

would

el

im

inate

this

possibi

l

ity

.) Unplug

the

AC

adaptor

from

the

wall

·~cket.

The

WHl

wil

l

continue

to

operate

for

a

second

or

two .

If

the

reading

instantly

cl>anges

when

unplugged

, you

prob

a

bly

have a ground

loop

.

Try

o I

)Plug

the

AC

adaptor

into

an

out

l et away from

t

he

transmitter.

2)Connect a good

earth

ground

to

your

transmitter

or

linear.

3)

Move

the

WM

L

to

a

different

location.

Note

that

sending

the

unit

back

to

"checkout"

ls

useless,

since

we

will

f~nd

nothing

wrong

with

Lt

.

If

you

experience

persistent

RF

pickup

with

any

Autek

equipment

.

send

a

9"

+ wide

SASE

for

a

~re

detailed

discussion.

We

reali

ze

it

can

be

quite

frustrating

at

first

lf

yeu

have

this

proble~.

Forcunately

,

thlo

problem

is

r

are,

and

we

know

of

no

one

who

has

not

been

able

to

solve

it

•

)

}

)

5 .

MEIER

"STICKS" liT

ONC

READCNG

OR

C

i\>I

I'IOT

GO

BEYOND

A

CERT

AIN

READI"lG

This

could

be

caused

by low

B+

or

batt

ery

voltage.

See

Section

foo.

On

at

least

one

occasion

a

microscoplc

ptccc

of

the

~eter

plastic

~lding

has

broken

off

and

lodged

itself

in

the

meter

~vement

.

The

solution

ls

simple

.

Turn

the

WMl

upside

down

and

shake

the

obstruction

out

of

the

1110vement

.

If

problem

reoccurs,

ren10ve

the

two

screws

Whlch

hold

the

front

panel

of

the

meter

, remove

the

clear

front

panel

,

and

shake

the

obstruction

out.

\~e

believe

thls

problem

is

eliminated

and would

appreciate

a

postcard

if

you

experience

lt

so

we

can

tighten

quality

contro

l

further

.

6.

OTHER

PROBLEMS

See

our

ongoing

"late

no

t

es"

fo

r

reports

of

common

problems

,

if

any,

as

well

as

tips

from owners .

G.

THEORY

Of

OPERATION

See

schematic/block

diagram

. The

RF

head

operates

as

follows•

Capacitors

Cl

and

C5

form a

voltage

divider

for

Rf

voltag~

at

the

head

output.

Toroid

Ll

measures

the

current

flowing

into

the

load

and

l~presses

a

voltage

across

the

33

ohm

resistors

proportional

to

this

current

.

Voltage

at

the

left

of

Rl

ls

proportional

to

voltage

across

the

load

~

current

into

the

load

.

Voltage

at

the

righ

t

of

R2

is

proportional

to

voltage

across

the

load

minus

current

into

the

load.

(Voltages

at

opposite

ends

of

the

torold

are

180

degroes

out

of

phase

,

as

with

all

transformers

.)

Thes

e

Rf

voltages

are

r

ect

ified

by

the

diodes

and

converted

to

DC

va

lu

es

.

\Vi

th

a 50

ohm

load

, Cl

is

adjusted

to

null

out

t

he

vol

tage

between 02

and

the

5V

reference--

this

voltage

is

proportional

co

the

square

root

of

"reflected

power. "

Similarly

the

voltage

between Dl

and

the

5 V

reference

ls

proportiona

l

to

"forward

+

reflected"

pewer,

cheoretlcally.

With

any

load

ocher

than

50 ohms r

es

istive,

the

reflected

pewer

ls

non-zero

and

SWR

is

above

l ol .

Note

chat

all

voltages

in

che

RF

head

are

referenced

to

a

regulated

5

volts

from

the

matn

circuit

board,

not

ground.

The

dravins

shows a

block

diagram

of

the

main

circult

board.

Forward and r

everse

voltage

s

are

scaled

for

the

power

range

selected,

and

peak

detected

by

active

peak

detectors

,

not

just

diodes

. The peak

detectors

have

negligible

error

(less

than

0.1%).

The

forward

and

reverse

voltages

are

th

en

divided

ln

a wide

ra

nge

electronic

divider

ci

r

cuit

accurate

to

0 .

2%

or

better,

and

drift

-

free

due

to

the

precision

resistors

and

voltaee

regulat

or

used

.

Autek

Research

has

supplied

co

mpl

ete

schematics

on

all

other

products.

If

you've

purchased

our

produces

before

, you ' ve

noticed

they

have

significant

technology

advantages,

and

are

usually

less

expens

ive

than

similar

devices

as

well.

As

a

result,

our

engineer-

ing

has

been

at

least

partially

copied

with

a

si

milar

design

.

Often

this

"copy"

is

so

poor

that

it

not

only

costs

us

sales,

but

raises

doubts

about

the

quality

of

our

product

by

inference.("!

tried

a

----

-

act:ive

filter

and

it

didn

'

t:

work

very

well,

so

no need

t:o

cry

Auceks~,

ecc.)

As

a

result,

we're

sorry

we

can~t

supply

a complet:e

schematic

of

the

propietry

circu1try

in

che

WMl.

However,

service

is

available

at

a

very

reasonable

cost:.

H.

TYPICAL

PERFORMANCE

Impedance•

50

ohms

Insert:ion

VSWR•

Less

than

l.lol

Accuracy•

57.

FS

(

8"1.

worse

case)

lOX

of

reading

co

0 .2

FS

Insertion

loss•

Negligible

SWR

Compucat:ion•

Less

chan

lOX

drop

at: 3•1 at:

10

watt:s

(20

wat:t:

range

scale)

Usable

co

~

watt

or

less.

PEP

charge

time

(internal)•

20

ms

or

less.

Frequency

range•

1.5

to

30

HHz.

I.

WARRANTY

We

back

our

produces

~ett:er

than

most

companies--

not

just

90

days,

but

one

!ull

year

.

L

IMI

TED

ONE

YEAR

WARR6NIY•Autek

Research

warrants

to

the

o

rigin

al consum

er

purchaser

that

its

products

shall

be

free

o!

defects

in

workmanship and mate

ri

als

for

one

year

from

the

date

of

purchase.

WARRAN

TY

LIMITA

T

ION

S•

Any

components of

the

Rf

head

which

could

'

b&

burned

out

operating

at

high

SWR

and

power

are

not

warranted.

This

includes

,

but

is

not

limited

to

,

the

trimmer

capacitor

.

This

limited

warranty

does

not

cover

, and

we

are

not

respo

nsibl

e

for,

any

product

which has been

modified

by

the

owner, ex

cept

as

provided

for

in

the

instructions,

or

any

malfunction

or

failure

resulting

from

improper

use,

improper

voltage,

lightning

,

improper

service

or

r

epair

by

the

owner

or

his

agent

,

or

from

abuse

, negl

ect,

•

accident,

f1re

,

use

contrary

co

instructions,

or

other

causes

beyond

the

control

of

Aucek

Research

.

This

warranty

ls

made

co

the

original

consumer

purchaser

only

, and

is

effective

only

upon

presentation

of

documented

evidence

of

provable

date

of

purchase.

This

warranty

covers

only

Autek

products

used

for

purposes

as

advertised.

We

are

not

responsible

for

incidental

or

consequential

damages.

Some

states

do

not

al low ex

clusion

or

llmit:acion

of

incidental

or

consequen

t:

ial

damage,

so

the

above

limitation

or

ex

clusion

may

not

apply

to

you.

This

warranty

gives

you

specific

legal

rights,

and you

may

also

have

ocher

rights

which

vary

from

state

to

state

.

J.

SERV

I

CE

ANP

RETURNS

To

obtain

service

,

FOLLOW

TilE

Ci

tECKLIST

BELOW,

then

mail

to

Autek

Research,

Box

302

,

Odessa,

Fla.

1

33556

I

Our r

ecords

show

your

order,

by

date

of

order

.

If

you

wish

to

claim

warranty

service

you must

do'so

with

t:he

return

.

You

must

tell

us

your

purchase

date

WITHIN

10

DAYS,

or

enclose

a copy

of

check

or

charge

statement.

(

Si

~ply

stat

i ng

"I

bought

the

unit: a few months ago"

is

not

sufficient

to

find

your

order,

and

service

charges

automatically

apply.)

Our

minimum

service

chacge

is

$17

in

u.s

.A.

Enclose

an

additional

$15

outside

US

,

except

an

additional

$5

in

Canada.

We

fix

75%

of

failures

for

the

minimum, and

wtll

proceed

to

$28

without

your

pemission

.

Any

addi

tional

charges

wUl

be

COD.

Please,

no

charge

cards

on

repairs

as

this

causes

a

delay.

CHECKLIST

WHEN

RETURNING

A

UNIT

•

vl.

Do

not: send

correspondence,

check,

etc

.

separately

.

PUT

EVERYTHING

INSIDE

THE

PACKAGE

WITH

THE

WMl.

Enclose

a check

or

H.O.

inside

the

package.

vf2.

Enclose

a

detailed

description

of

problem

inside

the

package.

.

~3.

Do

NOT

send

separate

correspondence

explaining

that:

you

are

returning

the

unit

,

or

as

ki

ng

permission

co

return

it.

This

is

not

necessary

v'4.

Allow

1-3

weeks Cor

repair

plus

up

to

2 weeks

shipping

times.

Exception•

If

you just:

got

the

unit

we

'

ll

norma

lly

ship

a

replacement

after

confirming

improper

operation

or

damage.

(Only

1

in

4000

packages

are

lost.

If

repair

takes

long

er

, be

patient.

It

' s

not

lost,

we '

re

working on

itl)

.

If

WRITING

•

V:

l, Always

give

approximate

purchas~

date.

We

may

have

mad

ij a change

in

design

since

.

;12.

Give

full

detaUs

of

probl

em

.

Be

sure

to

tell

us

your

transmitter,

linear,

feedllne

type

,

antenna,

antenna

height.

We

want

to

help

you,

but

mo

st

letters

are

too

vague.

We

have no

idea

of

th

e

condition

or

your

rig,

your

ability

to

follow

instructions,

your

technical

knowledge, and what

you've

tried

t:o

solve

any

problem,

and no

desire

to

carry

on

extens

ive

correspondence.

Include

All

details

in

the

!irst:

letter.

v3•

We

cannot

connent

on

Alii

modifications

to

our

equipment

as

inventive

hams would make

this

a f

ul

l-

time

job.

~4.Enclose

an s;• wide

SASE

!or

a

speedier

reply.

(O.

K.

to

fold

envelope.)

K.

LATE

NOTES

None

to

date.

Ge

Di

od

e

1N

295

Dl

C2

.

00

1

T

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r

't.

~

"'

0

TOROID ,

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cs

I

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SHT

4

7K

,

P.

4 4 7K ,R 5

R7

OU

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1

9.

JK

1

.,

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I

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f\

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u,

I

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"'

> +

(1

"'

!;;!

~

....

P

EA

K

DET

EC

TO

R

l'

K/ ;\1'

+5V

.

VOLTAGE

L-

-----------------1~

--------_.

------iR

EGUL

AT OR

RE

MOTE

ii£A.

5 __ _

MA

I N

BOA

RD

SWR

AD

J

UST

1

'/MJ

CO~u>t;T

IN

G

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t-'l

li

\

IA

IT

NET

El

t

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e

l.

?Ze.1

eau:lt

Autek Research WM-1 SWR Instructions Manual

Autek Research WM-1 SWR Instructions Manual

in altre lingue

Altri documenti