DYNACO Dynakit ST35 User Manual

DYNACO Dynakit ST35

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INSTALLING

THE

STEREO

3S

Dynakit

Stereo

;1;)

amplifiers

suppli(~cJ

with

POWN

trans-

former

PB-02S

can

be

win~d

for lise

with

(·ithc-r 120-

or

240-volt

a.c.

power

sourcf's. in

lhe

followin~

w;~y:

For

240-volt

operation.

( )

Connect

the

violet-and-whi

te

lead

to

lug

;:.)

of

the

i)-lug

terminal

strip.

Connect

the

black-and-white

kitd

to

lug

==5

of

the

;J-lug t0rmino.I

strip

(S).

Connect

the

bbck

ll,acl to

terminal

B of

the

fusp

holdN

(S).

Connect

the

viold

lead

to

lug

;;:,t

of

Uw .J-lug

terminal

strip.

Proceed

with

the

wiring

steps

in

the

regular

assembly

portion

of

this

hookkt.

hl'ginning

with

wiring

step

#

3.

For

120-volf

operation.

Begin

with

the

group

of

scvC'n Ir'ads from

thr

pOWl'r

transfonm·r.

all

of

which

should

come

through

tb(~

hok

in

the

chassis

farthest

from

the

fust' holder.

('ol1lwl't

the

black

lead

to tcrmin;)l B

of

the

fus(' hold0l',

Connect

the

black-and-whitl'

lcad

to tr'rmina) B of tlw

fuse

holder

(S;.

I ) COnJ1l'ct

the

vio!rt

lead

to lug ;;:4 of

the

.j-lug

tt'rminal

strip.

Connect

the

vioJt>t-and-whitl'

lead

to

lug

;;:4 of

the

5-lug

terminnl

strip.

Proceed

with

the

wiring

sters

in th('

regubr

ass('mhly

portion

of

this

booklet,

beginning

with

wiring

step

:#

:1.

r1

VIOLET

VIOLE

T

aWHITE

1

BLACK

, B

WHITE

240-voll

FOR

OPTIONAL

TRANSFORMERS

9LACK

VIOLET

a

WHITE

BLACK

BWHITE

~

VIOLET

120-volt

SPECIAL

INSTRUCTIONS

120-240

VOLT

POWER

8LAC~

In

addition

to

the

Stereo

:l5,

your

complete

stereo

system

will includf>

one

or

more

signal

sources

I

turntabll'.

tUI1l'r,

tape

transport)

, a

stereo

preamplifier

(unless

included

with

the

signal

source),

and

two

loudspeakers.

Installation

of

the

Stereo

:~5

is

simrle.

You will

need

two

shielded

audio

cables

for

the

inputs

(usually

provided

with

the

preamplifier)

and

two

lengths

of

two-conductor

wire

with

which

to

make

the

connections

to

the

loudspeak-

ers.

Ordinary

lamp

cord

will

do

for

the

latter.

The

Stereo

3,5

is

d('signrd

for

use

with

stereo

pn':llnpli-

fu'rs

which

have

their

own

power

supply,

such

as

th('

Dyna

p AS-3.

In

addition

to a

high

II~vel

of

performance,

the

preamplifier

should

he

capable

of

delivering

a

signal

of

about

L

volt

to

drive

the

Stereo

3.')

to

its

full

output.

'1'111'

Stereo

3:>

a.c. lint'

cord

should

he

connected

to a

switched

auxiliary

a.c.

outlet

on

the

preamplifier;

in

this

way,

it

.will be

turned

on

and

off

automatically

when

the

prf':llnpli-

fier is

switched

on

and

off.

Since

the

Sterpo

;3;)

contains

its

own

fuse,

an

outlet

which

is

not

fuspd

may

be

used.

Be

sure

that

all

mounting

screws

ilnd

nuts

are

tight.

Compare

the

wiring

of

('Jch

of

the

tube

sockets

to

that

shown

in

thp

pictorial

diagram.

All

connections

should

be seclll'ely

soldNed,

with

enough

space

between

con-

n(,etions

to

the

tube

pin

lugs

so

that

there

is

no

chanc0

of

an

::lccidental

short-circuit.

i

Compare

the

wiring

to

each

lug

of

thC'

filter

capacitor

with

that

shown

on

the

diagram.

Check

carefully

to see

that

all

connections

are

soldered,

and

that

excess

lead

IC'ngth

has

not

caused

any

connection

to

short-circuit

to thf,

cbassis.

Count

the

wires

going

to

each

terminal

on

diagram

nnd

amplifier.

\

UsC'

special

care

in

eXHmining

all

connections,

to be sut'(,

that

none

of

them

are

high

enough

to

touch

the

bottom

platf'

when

it

is

installed.

Chpck

the

;:i-lug

terminal

strip

and

filter

capilcitor

closely.

The

tubes

and

fusc

may

now

hI'

installed.

The

sockd

on

rach

board

which

is

supplied

already

mounted

is for

the

1247

tubl'.

Each

of

the

two

sockets

installed

and

wired

during

assembly

receives

one

of

the

6BQi)

tubes.

1M

POR-

TANT:

When

inserting

the

tubes

in

their

sockets

for

the

first tim(',

the

socket

should

be

supported

from

below to

avoid

strain

on

the

circuit

bOilrd,

due

to

the

tight

fit

of

new

sockets.

The

amplifier

a.c.

cord

should

NOT

be

plugged

into

a wall

outlet

until

aftcr

the

tubes

arc

installed,

and

the

cover

and

bottom

plate

an'

securely

in

place.

The

cov('r

and

bottom

plate

arc

aUached

at

the

same

tirm~.

by

s(~tting

the

amplifil'r

chassis

on

the

bottom

plate,

which

fits

inside

the

chassis.

and

then

lowering

the

cow'!'

onto

the

chassis.

The

thrcE'

pieces

are

fastelwd

together

by

four

sheet

mdal

scr('ws

through

the

sides

of

the

chassis.

The

four rubhE'r feet

arc

installed

by

pressing

them

into

the

corn('r

ho!<'s of thl'

bottom

pIntC'.

Tlw

cover

should

be

used

w!wne-vpr

tl1<'

:lInplifkr

is

o]J('ratl~d

where

it

may

be

touched

accidentally;

not

only

do

the

tubes

bl,~CorIW

quitt>

hot

in

operation.

but

some

points

on

the

circuit

board

carry

a

voltage

which,

while

not

lethal,

can

be

quite

uncornfortahl('

if

touched

while

the

amplifilT

is

on.

PLACES

TO

DOUBLE-CHECK AFTER

WIRING

,J;;

i

'onnl'ct

one

end

of

~l

11 I" wire lo

pin

:.::-9

of

V<3

on

the

LEFT

circuit

hO:lrd

'.

S:,

COIllWct thf'

ot!wr

end

to

eyelet

==

II,S)

,

,J'!' , COnIH'ct

011('

('nd of a 1"

bare

wire

to

pin

=:2

of

V-:3

on the'

LEFT

circlIit

hoard

(S),

Connl'ct

the

otl1('r

I'nd

to f'yP1ct ;;L!) l

S)

.

;),'i,

COnIwct

011('

('oc1

of

allother

I"

bal'l'

wire

to

pin

:;::2

of V

-~

on

II\('

LEFT

circuit

hoard

:

S).

Connect

the

other

end

to

eyeld

#8

IS).

;)6,. )

f:onnect

one

end

of

:J

1"

wire

to thl'

long-

lug of

the

LEFT

input

socket

IS,.

Conncct

the

other

('ncl to

('yf'let

;;

L

..

S ".

f)i

('onm'd

onl'

elld

of

;\

11/~"

wire

to

the

short

lug

of

tl1('

LEFT

input

sockel

is'.

Connect

the

other

end

to

eyelet

:.::-:2

IS).

.j'"

Ins!'rt

the

line

cord

through

the

rubber

grommd

lnountl'd

on

thl~

chassiii,

und

push

it

through

far

('nough

to

tie

a kno/.

about

;)" from

the

pnd.

Tie

thp

knot.

Thl'n,

>,;eparate

01('

two

conductors

of

the

lint·

cord

for :.lbOllt 4".

Cut

11i~"

from

onc

of

them,

and

stri

p

and

tin

lhe

('nds

of

both.

;-)!l !

CO!Hwct

th,'

long-er of

the

two

lirH~

cord

conductors

to

lug

=::-4

of

th"

i)-lug-

terminal

strip

I S

I.

Connect

th(,

otlwr

conductor

to

lug

A

of

th<'

fuse

holdpr

(S).

This

completes

the

wirin~

of

the

Stereo

3f).

9

Table of Contents

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DYNACO Dynakit ST35 Specifications

General

Brand	DYNACO
Model	Dynakit ST35
Category	Amplifier
Language	English

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