DYNACO Stereo 70 Інструкція по збірці - Сторінка 4

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Також для DYNACO Stereo 70: Посібник з реставрації (20 сторінок), Посібник з реставрації (5 сторінок), Посібник користувача (12 сторінок)

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gun, long nose pliers, screwdriver, and wire

cutters.

Although not essential, a low cost wire

stripper and cutter of the type which can be pur-

chased for less than $1.00 will greatly facilitate

cutting and stripping the various leads in the kit.

Good soldering technique is valuable in obtain-

ing sat i s f act

0 I'

Y results from any electronic

equipment.

ALL SOLDERING MUST BE DONE

WITH ROSIN CORE SOLDER.

There is no war-

ranty on any equipment in which acid core solder

has been used. Make sure that the solder used is

plainly marked "Rosin Core."

you have solder

on hand the origin of which is doubtful it is wise to

obtain new 50/50 or 60/40

a sin core solder.

Whenever sol del' in g is required, the assembly

instructions specify it by "(S)."

this symbol is

not shown aiter a connection is specified, it indi-

cates that further connections will be made at that

point before soldering.

Soldering is accomplished by heating the joint

with the iron until solder is hot enough to flow

when touched to the joint.

It is

not desirable to

feed the solder to the iron. It should be fed to the

junction of iron and joint. After the solder flows,

the iron should be held in place for a few seconds

and removed when it is seen that the solder has

contacted both parts of the connection - the lug and

the wire to which it is connected.

should not

show a ball of solder but a smooth transition from

solder to component lead.

Before a p ply in g solder the joint should be

clean and the lead should be crimped in place so

as to have mechanical security.

is not neces-

sary to wrap leads around contacts many times. A

single turn and pinching together with long nose

pliers is suitable.

After soldering, there should

be no play at the joint if the lead is wiggled with a

pair of plie rs. It is practical to do all soldering

with a pencil type iron of low wattage rating. A

small tip is extremely useful when working in a

confined space.

a solder ing gun is used, it

should be used with discretion since the amount of

heat available is far more than

e qui red for

soldering light wires.

Component leads should be trimmed as they

are used; the length should be such that the proper

connection can be made from point to point without

strain on lugs or components.

Care should be

exercised not to allow wires to touch one another

unless they are actually connected to the same

point.

The ins t

I' U

c t ion s which follow have been

arranged for simplified procedure in which the

work can be done without interference between the

various portions of the wiring.

is recommended

that the instructions be followed on a step by step

basis, checking off each stage as it is completed.

The pictorial diagrams should be used for refer-

ence and all connections checked against these

before going on to the next stage.

the wiring is

done methodically and each step checked carefully,

your amplifier should work without difficulty as

soon as it is completed.

MECHANICAL ASSEMBLY

PICTORIAL DIAGRAMS SHOULD BE CONSULTED

DURING ALL PHASES OF ASSEMBLY

1 ("I) Mount the seven octal sockets with 4/40

hardware (the smallest screws supplied).

Note that there is a small slot or keyway in

the center hole of each socket; be sure in

each instance that this keyway is properly

oriented as shown in the pictorial diagram.

Insert screws from the top of the chassis

and mount the sockets from the bottom.

Fasten with nuts and lockwashers.

Place the bakelite insulator over the front

of the two socket input connector and mount

the combination from the inside of the

chassis using 4/40 hardware.

(II)

Mount the SPDT slide switch (with three

lugs) next to the input connector. No nuts

or lockwashers are necessary since this

item has threaded holes.

4 (.;) Mount the two four screw terminal strips

on the c has sis rear from the outside.

Fasten with 4/40 hardware.

(v')

Mount the two 10,000 ohm potentiometers

in the 3/8" holes near the center of the

chassis.

Locate with the three connecting

lugs facing the front of th,: chassis.

Put a

3/8" lockwasher on each shaft, insert from

the inside, and fasten with a 3/8" nut.

Fasten the long 4/40 screw between the two

potentiometers with a 4/40 nut. Then place

the selenium rectifier over the screw. The

lug marked

(+)

should be closest to the

chassis and both lugs should face the rear

of the chassis.

Fasten with 4/40 lock-

washer and nut.

(J)

Mount the rubber grommet in the 3/8" hole

in the cente

of the rear

a n g e of the

chassis.

8 (/). Mount the fuse post in the D shaped hole in

the rear of the chassis. The rubber washer

goes between the chassis outside and the

shoulder of the fuse post.

Fa s ten with

special nut provided.