Harman Kardon TA10 Owners Manual - Page 6

Separate

BASS

and

TREBLE

controls

are

incorpo-

rated

in

the

Solo,

to

provide

the

full

range

of

adjustment

required

for

satisfactory

high

fidelity

performance.

RUMBLE

FILTER

Many

records,

record

changers

and

turntables

pro-

duce

an

objectionable

low

frequency

signal

that

is

often

strong

enough

to

be

picked

up

by

the

phono

cartridge

and

introduced

into

the

playback

system.

Known

as

"rumble"

this

undesirable

signal

can

be

eliminated

in

the

Solo

by

the

use

of

the

Rumble

Filter

which

is

con-

trolled

by

a

three

position

slide

switch

located

on

the

front

panel.

In

position

0

the

rumble

filter

is

not

con-

nected

and

frequency

response

is

essentially

flat

to

20

c.

p.

s.

When

the

switch

is

placed

in

position

1

the

response

is

slowly

rolled

off

and

at

20

c.p.s.

is

reduced

by

6

db.

Frequency

response

is

reduced

by

12

db

at

20

c.

p.

s.

when

the

switch

is

placed

in

position

2.

Posi-

tion

1

will

be

most

useful

where

a

minimum

amount

of

rumble

appears

in

the

system

while

position

2

gives

additional

low

frequency

attenuation

which

will

be

most

helpful

in

cases

of

heavy

rumble.

ORGANIZING

THE

VARIOUS

CONTROLS

In

general,

every

control

on

a

well

designed,

hon-

estly

considered

high

fidelity

instrument

has

a

specific

useful

function,

related

to

each

of

the

other

controls.

Although

this

cannot

be

a

full

treatise

on

the

subject,

an

explanatory

note

on

the

relationship

of

the

various

front

panel

controls

will

doubtless

prove

useful

in

or-

ganizing

and

clarifying

them

for

the

user.

Beginning

with

the

function

selector,

choose

the

type

of

program

material

you

plan

to

listen

to

(tuner,

phono,

etc.).

Choose

the

correct

record

equalization

setting

for

the

particular

record

you

are

to

play.

With

Loud-

ness

Contour

Selector

in

the

uncompensated

position,

turn

the

loudness

(volume)

control

to

as

high

a

level

as

you

can

briefly

allow.

(This

to

permit

you

to

make

the

remaining

adjustments

while

you

are

listening

at

your

own

maximum

efficiency.)

Now

adjust

the

Bass

and

Treble

Tone

Controls

to

correct

for

the

electro-

mechanical

characteristics

of

the

loudspeaker

you

are

using

and

for

the

acoustic

characteristics

of

the

room

in

which

you

are

listening.

Modify

each

until

settings

are

Chosen

which

in

your

total

system

create

the

proper

sense

of

aural

balance

and

evenness.

Now

reduce

the

loudness

(volume)

con-

trol

setting

to

a

level

somewhat

lower

than

normal

listening

level

in

your

room.

You

will

note

that

the

full

bodied

-lifelike

quality

you

experienced

at

high

lis-

tening

level

has

disappeared

(this

because

of

the

Fletcher

-Munson

effect

described

in

the

paragraph

on

the

H/K

Dynamic

Loudness

Contour).

With

all

other

controls

unchanged,

select

the

best

contour

setting

for

you.

Do

this

by

switching

quickly

through

the

several

positions

until

you

find

the

one

which

most

nearly

du-

plicates

the

full

bodied

sound

you

enjoyed

at

high

level.

Now

turn

the

loudness

control

up

to

the

level

at

which

you

wish

to

listen

-

(perhaps

the

maximum

level

you

can

permit

in

your

home)

-

and

listen.

You'll

find

that

6

there

is

automatic

compensation

of

contour

wherever

you

set

the

loudness

control

thereafter.

In

fact,

under

normal

circumstances,

you

should

not

find

it

necessary

to

readjust

the

tone

controls

or

the

contour

selector

once

having

chosen

the

correct

settings

for

you,

your

room

and

your

system.

HUM

PROBLEMS

In

some

installations

where

a

record-player,

tape

recorder,

or

other

auxiliary

AC

operated

equipment

is

used,

hum

may

be

encountered

due

to

voltage

differ-

ences

between

the

various

units.

This

may

be

elimi-

nated

by

reversing

one

or

all

of

the

AC

power

plugs.

Simply

reverse

one

at

a

time

until

improvement

is

ex-

perienced.

MAINTENANCE

AND

REPAIR

Due

to

the

conservative

design

and

high

quality

com-

ponents

of

the

Solo,

no

routine

maintenance

other

than

yearly

tube

-checking

is

required.

Should

trouble

de-

velop,

however,

only

the

most

qualified

service

man

should

be

employed,

as

special

equipment

and

training

is

required

to

properly

align

a

high

fidelity

FM

receiver.

SPECIFICATIONS

RF

SECTION

Circuits:

FM:

Armstrong

circuit

with

Limiter

ti

Foster

-Seeley

Discriminator.

Automatic

Frequency

Control

—Low

Noise

Front

End

consisting

of

Tuned

Triode

Grounded

Grid

Amplifier

and

Triode

Mixer.

AM:

Superheterodyne

with

A.V.C.

and

Ferrite

Antenna.

Sensitivity..

FM:

5

microvolts

for

30

db

quieting;

3

microvolts

for

20

db

quieting.

AM:

Loop

sensitivity

80

microvolts/meter;

Terminal

sensitivity

20

microvolts.

Selectivity:

FM:

200

KC

bandwidth:

6

db

down.

AM:

8

KC

bandwidth:

6

db

F

I

ZT4iscriminator

peak

to

peak

separation

375

KC.

Frequency

Range:

FM:

88-100

MC.

AA!:

530-1050

KC.

FM

Drift:

1

KC

max.

Image

Rejerrium

.

FM:

40

db.

AM:

30

db.

IF

Rejection:.

FM:

70

db.

AM:

30

dh.

Antenna

Input:

FM:

300

ohms.

AM:

Built-in

low

noise

ferrite

loopstick

plus

high

impedance

terminal

for

external

antenna.

Diciorriarz:

Less

than

1%

harmonic

on

FM.

Less

than

1%

harmonic

for

up

to

80%

mod.

on

AM.

Frequency

Response:

FM:

112

db

20

to

20,000

c.p.s.

including

standard

79

micro

-second

&emphasis.

AM:

3

db

20

to

5,000

v_p_s

num

Lerch

60

dh

below

100%

modulation.

Radiation:

Within

FCC

Requirements.

AUDIO

SECTION

Circuits:

2-6V6

Pentode

Connected

Output

Level:

10

watts

at

3%

IM.

Peak

Power:

15

watts.

Output

Impedance:

8

and

16

ohms.

Frequency

Response:

st:

I

db

20.20,000

c.p.s.

at

5

watts;

I

db

30-10,000

c.p.s.

at

10

watts.

Damping

Factor:

6.

Hum:

Min.

Volume

Hum:

80

db

below

10

watts.

Aux

and

Tuner

flum:

60

db

below

10

watts.

Mono

Hum:

50

db

below

10

watts.

Tone

Control

Range:

12

db

boost

at

50

cycles.

12

db

boost,

15

db

cut

at

10,000

cycles.

Rumble

Filters

2

positions,

6

db

per

octave

cut

below

40

cycles,

6

db

per

octave

cut

below

11,0

cycles.

Input

Levels:

Aux:

0.7

volts;

Phono,

8

millivolts.

Dynamic

Loudness

Contour:

3

Positions:

Position

1;

Uncompensated

Position

2:

Approximately

8

dh

less

than

Fletcher

-Munson

Position

3:

Fletcher

-Munson

Compensation

Equalization

Control:

3

positions

—LP,

RIAA,

FUR

Speaker

Selector

Switch:

3

positions

—A,

B,

or

AB

OVERALL

SPECIFICATIONS

Controls:

(Total

9)

Function

(AM,

FM,

FM

-AFC,

AUX,

Phone)

Loudness,

Treble,

Bass,

Tuning,

Rumble

Filter,

Contour,

Equalization,

Speaker

Selector.

Dimensions:

13-1/4"

wide

x

13"

deep

x

4"

high

(including

loopstick—not

in-

cluding

knobs).

Convenience

Outlet:

1

-AC

receptacle

on

chassis

rear,

controlled

by

power

switch.

Tube

Complement:

(Total

12)

2-12AX7,

2

-EL

-84,

1-LZ-81,

2-12AT7,

1-

6BA6,

2-6A116,

1-6BF6,

1

-GALS.

Power

Consumption:

70

watts

Finish:

Control

Panel:

Copper,

Cage

and

Knobs:

Matt

Black

Shipping

Weight:

25

lbs.

SPECIAL

NOTES

(a)

Signal,

unaffected

by

tone

controls,

available

to

drive

tape

recording

head.

(b)

Safety

Interlock

Power

Cord

disconnects

power

when

cage

is

removed.

(c)

Printed

circuit

used

throughout,

employs

dip

soldered

copper.clad

laminated

phenolic

plastic

board.

(d)

Simple

mechanical

disassembly

makes

board

easily

available

for

service.

Harman Kardon TA10 Owners Manual - Page 6

Maintenance, Repair, Specifications

Page 6 highlights