Mitsubishi Electric MUX-25TV - E1 User Manual download pdf (Page 82)

Add Stereo Sound To Your

TV Receiver

l (from

page

64)

An interior view

of the

finished project.

driver with a metal shank for the

alignment

procedure.

If you

already

mounted

the project

on

the

back

panel

of

your

TV set, dis-

mount it now

and set SQUELCH

con-

trol R2 fully

counterclockwise (mini-

mum resistance)

and

VOLUME

con-

trol R11 to midposition. Plug

the

project's OUTPUT

cable into the au-

dio amplifier. If the amplifier has

a

treble

control, set

it for

full cut.

Turn

on

your

TV set and tune in

a

channel

that's

transmitting a stereo

program.

Carefully adjust fine tun-

ing (if your set has this

control) for

optimum picture

and sound quality.

If your fine

tuning

is

sloppy, you'll

misalign the project slightly

and

will

have to readjust the fine

tuning for

the

other channels.

As you turn up the

volume

on the

audio amplifier,

you'll probably

hear

a

noisy,

distorted program. Adjust

C2

and then

L3

for maximum

volume. Either

of the two peaks you

may find

while

making

this adjust-

ment is fine.

Carefully adjust

L3

for

maximum volume,

and then touch

up C2

for minimum

audible noise.

Tune the TV

set to an unused chan-

nel. Adjust the SQUELCH

control to

slightly past the point where

the

rush-

ing noise

just disappears.

Then

tune

to an active

channel and

note

that the

sound comes

on.

At this

point, you should be

getting

excellent sound. This will

be particu-

larly

noticeable if you're

using a

good -quality

amplifier and speaker

system. You may

at this time be satsi-

fied with

obtaining

high

-quality

monophonic

sound and stop here

un-

til

you're ready

to

invest

in

a stereo

TV

converter. If so, connect a 0.01 -

micro farad

capacitor across the OUT-

PUT

cable to restore

the treble to its

normal

range.

In

Closing

Once you're

satisfied

with

the results

obtained with this

project, it's time

to

add

a stereo

TV

converter. There

are

many

such converters on the market.

If you want one with

a built -in power

amplifier to

drive an extra set

of

speaker systems, you might

consider

Sony's Model MLV -1100.

On the

other

hand,

if you prefer

to use your

present

stereo

system,

you

can try

Sears' No.

564.54390450 stereo

adapter.

Both

converters work well

with this project

and are reasonably

priced,

especially the Sears unit

at

less than $100.

To

obtain stereo sound,

connect

the converter

as

indicated

in the in-

structions supplied

with

it. If neces-

sary, adjust

VOLUME

control R11 for

dependable, quiet

stereo

reception.

Note that this is

a

very

broad adjust-

ment. Then sit back

and enjoy great

stereo

sound.

AF

A

Versatile Printer

Stand

(from

page 55)

acrylic cement.

When

the stand

is

ful-

ly

assembled

and the glue

has

set for

about

24 hours, you are

ready

to

paint

it.

If you wish your

wood

stand to

have

a

very

smooth,

professional

fin-

ish, first rub onto all exterior surfaces

a thin

layer of Dap. This

is

a pre-

mixed plaster -like

material that

comes

ready

-to

-use

in

a can. It dries

white like plaster, but

the color is im-

material,

since

you

will

be applying a

paint,

rather

than

a stain, finish. Al-

low the

Dap to dry

a

couple of

hours.

Gently

rub

down

with very

fine (No.

000) emergy cloth to

smooth

the

sur-

face. Spray on a primer coat of paint

and allow it to completely dry. Then

spray on a coat of the color

paint

you

plan to

use

for finishing (an

enamel

or

gloss

acrylic paint

is

best). Once

again, allow the paint

to

completely

dry. Then

gently rub

down the paint

with fine steel

wool

(No. 000) and

spray on the

final finishing

coat.

The Plexiglass

/Lucite

version

is

available in kit form,

cut, slotted

and

polished (see note in Parts

List).

AE

96 / MODERN

ELECTRONICS

/ April 1986 Say You Saw It In Modern Electronics

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