Yaesu FC-902 - Front Panel Controls; TUNE Control; BAND Switch; SWR SET Control

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FRONT PANEL

CONTROLS

TUNE

The

TUNE

control

is

a

dual

capacitor

to

provide

capacitive

adjustment

of

the

coupling

between

the

transmitter

and

the

impedance

established

by

the

BAND

switch

and

the

LOAD

control,

The

TUNE

and

LOAD

controls

are

adjusted

for

minimum

SWR.

BAND

switch

The

BAND

switch

selects

the

inductance

required

to

accomplish

matching

on

the

band

in

question,

The

operator

should select

the

BAND

switch

position

which

best

covers

the

portion

of

the

band

being

used,

The

DIREGT

position

of

the

BAND

switch

connects

the

transmitter

directly

to

the

antenna,

bypassing

the

FC-902

matching

circuitry,

but

permitting

measurement

of

the

SWR

on

the

line

at

that

point.

SWR

SET

This

control

is

used

to

calibrate

the

SWR

METER:

the

SWR

may

be

read

accurately

by

adjusting

the

SWR

SET

control

for

full

deflection

of

the

FWD

POWER

meter

with

the

POWER

&

SWR

switch

in

the

SWR

SET

position.

LOAD

The

LOAD

control

is

connected

to

a

variable

capacitor

which

adjusts

the

coupling

between

the

antenna

feedline

and

the

impedance

presented

by

the

BAND

switch

inductor

and

the

TUNE

control.

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