Heathkit UXR-1 Manual de usuario

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INTRODUCTION

The

Model

UXR-1

is

a

six

transistor

superheterodyne

receiver

of

advanced

design

using

the

latest

prin-

ted

circuit

techniques

to

ensure

the

utmost

reliability,

consistency

and

ease

of

assembly.

Both

the

medium

and

long

wave

bands

are

covered

and

the

extra

large

7!

x

4"!

high

flux

speaker

will

give

ex-

cellent

tone

and

volume.

which

will

give

many

years

of

service

and

the

controls

are

fabric.

The

extremely

attractive

case

is

made

of

first

grade

hard

wearing

leather

gold

trimmed

matching

the

elegant

speaker

SPECIFICATIONS

Tuning

Range

ee

.

Sensitivity

.......

eee

ee

Loud

speaker

.4.466w

eae

«

Ya

ee

ewe

ees

Batlle

rye

gaa

ae

Sas

Battery

Nite

tiacsie

eso

see

ee

we

TETAN

SISOS

steel

Leak

bes

Aiea

te

ersle

es

See

he

Peni

ss

ee

eid

Printed

Board

CaS

Ceci

he

eco

ecu

Apa

ean

Aiea

Aetna

cated,

eed

ee

Pave

Ge

ha

ae

ad

ee

rh

gem

Weight

with

battery

..

ee

ee

oe

Shipping

weight

ee

]

GLOUCESTER

DAYSTROM

-

5

lbs.

200-550

metres

(1500-535

kc/s.)

1000-1875

metres

(300-160

kc/s.)

15

pV

for

50

mW

output.

x

4"

High

flux,

wide

angle

diffusion.

.

Drydex

DT9,

Ever

Ready

PP9.

300-400

hours

average

use.

.

Mullard

I

-

OC44,

2

-

OC45,

1

-

OC8ID

and

2

-

OC81

plus

|!

-

OA81

Diode.

.

Standard

E.

17148

High

Grade

Electrical

laminate

with

.0015

copper

foil.

.

Solid

cowhide

leather

throughout.

5

lbs.

8

ozs,

LTD.

ENGLAND

ENGLAND

‘I-adXN

TAGOW

YSAISDSY

YOLSISNVYL

YOS

LINDYID

fa)

=

nal

2

O

ce

-

—)

>=

<

O

ed

ab

|

SLIOA6

—

wos9

s9cz

VAGE

4995

wa

GLOUCESTER

PRELIMINARY

NOTES

AND

INSTRUCTIONS

The

Step-»y-Step

instructions

given

in

this

manual

should

be

followed

implicitly

to

ensure

a

minimum

of

difficulty

during

construction

and

a

completely

satisfactory

result,

including

many

years

of

accur-

ate,

trouble-free

service

from

the

finished

instrument.

UNPACK

THE

KIT

CAREFULLY,

EXAMINE

EACH

PART

AND

CHECK

IT

AGAINST

THE

PARTS

LIST.

In

so

doing,

you

will

become

acquainted

with

the

parts.

If

a

shortage

is

found,

attach

the

inspection

slip

to

your

claim

and

notify

us

promptly.

Screws,

nuts

and

washers

are

counted

mechanically

and

if

a

few

are

missing,

please

obtain

them

locally

if

at

all

possible.

Lay

out

all

the

parts-so

that

they

are

readily

available

in

convenient

categories.

Refer

to

the

general

information

inside

the

covers

of

this

manual

for

instructions

on

how

to

identify

components.

Moulded

egg

containers

make

handy

trays

for

holding

small

parts.

Resistors

and

Capacitors

may

be

placed

in

the

edge

of

a

corrugated

cardboard

box

until

they

are

needed.

Use

lockwashers

under

all

screws

and

nuts,

and

also

between

controls

and

the

chassis.

When

solder

lugs

are

mounted

under

nuts,

the

use

of

lockwashers

is

unnecessary.

-

Resistors

and

capacitors

have

a

tolerance

rating

of

*

10%

unless

otherwise

stated.

Therefore

a

100K

ohm

resistor

may

test

anywhere

between

90

and

110K

ohms.

Frequently

capacitors

show

an

even

greater

variation

suchas

-50%to

+100%.

This

Heathkit

accommodates

such

variations.

Unless

otherwise

stated

all

wire

used

is

insulated.

Bare

wire

is

only

used

where

lead

lengths

are

short

and

there

is

no

possibility

of

a

short-circuit.

Wherever

there

is

a

possibility

of

the

bare

wire

leads

of

resistors

or

capacitors,

etc.,

shorting

to

other

parts

or

to

chassis,

such

leads

must

be

cov-

ered

with

insulated

sleeving.

To

facilitate

describing

the

location

of

parts,

all

valveholders,

controls,

tag

strips,

etc.,

have

been

lettered

or

numbered.

Where

necessary

all

such

coding

is

clearly

shown

in

the

illustrations.

When

instructions

say,

for

example,

''wire

to

socket

G3".

refer

to

the

proper

figure

and

connect

a

wire

to

tag

3

of

socket

G.

All

rotary

switch

tags

are

numbered

clockwise

when

viewed

from

the

rear

of

the

wafer,

i.e.

the

end

remote

from

the

knob.

All

resistors

may

be

wired

either

way

round.

All

capacitors,

excepting

electrolytic

capacitors,

may

be

wired

either

way

round.

Carefully

letter

and

number

tag

strips,

valveholders,

transformers,

etc.

A

wax

pencil

is

ideal

for

this

purpose.

When

mounting

resistors

and

capacitors

make

sure

that

the

value

can

be

read

when

in

position.

Observe

polarity

on

all

alectrolytic

capacitors,

i.e.

RED

=

POSITIVE.

Where

connections

to

the

''Busbar"

are

referred

to

in

the

Step-by-Step

instructions,

the

connections

should

be

made

to

the

nearest

point.

A

circuit

description

is

included

in

this

manual

so

that

those

with

some

knowledge

of

electronics

will

be

able

to

obtain

a

clearer

picture

of

the

actual

functioning

of

this

instrument.

It

is

not

expected

that

those

with

little

experience

will

understand

the

description

completely,

but

it

should

be

of

help

in

the

event

that

they

desire

to

become

more

familiar

with

the

circuit

operation

and

thus

learn

more

from

GLOUCESTER

DAYSTROM

LTD.

ENGLAND

building

the

kit

than

just

the

placing

of

parts

and

the

wiring.

Read

this

manual

right

through

before

starting

actual

construction.

In

this

way,

you

will

become

fam-

iliar

with

the

general

step-by-step

procedure

used.

Study

the

pictorials

and

diagrams

to

get

acquainted

with

the

circuit

layout

and

location

of

parts.

When

actually

assembling

and

wiring,

READ

THROUGH

THE

WHOLE

OF

EACH

STEP

so

that

no

point

will

be

missed.

A

tick

(Teneara

be

made

in

the

space

provided

at

the

beginning

of

each

instruction

immediately

it

has

been

completed.

This

is

most

important

as

it

will

avoid

omissions

or

errors,

especially

whenever

work

is

interrupted

in

the

course

of

construction.

Some

Kit-builders

have

found

it

helpful

in

addition

to

mark

each

lead

in

the

pictorial

in

coloured

pencil

as

it

is

completed.

Successful

instrument

construction

requires

close

observance

of

the

step-by-step

procedure

outlined

in

this

manual.

For

your

convenience,

some

illustrations

may

appear

in

large

size

folded

sheets.

It

is

suggested

that

these

sheets

be

fastened

to

the

wall

over

your

work

area

for

reference

purposes

during

instrument

construction.

The

Company

reserves

the

right

to

make

such

circuit

modifications

and/or

component

substitutions

as

may

be

found

desirable,

indication

being

by

''Advice

of

Change"

included

in

the

Kit.

NOTE:

Daystrom

Ltd.

will

not

accept

any

responsibility

or

liability

for

any

damage

or

personal

injury

sustained

during

the

building,

testing,

or

operation

of

this

instrument.

ALL

GUARANTEES

ARE

VOIDED

AND

WE

WILL

NOT

REPAIR

OR

SERVICE

INSTRUMENTS

IN

WHICH

ACID

CORE

SOLDER

OR

PASTE

FLUXES

HAVE

BEEN

USED.

WHEN

IN

DOUBT

ABOUT

SOLDER,

IT

IS

RECOMMENDED

THAT

ONLY

'"'60/40''

RESIN

CORE

RADIO

SOLDER

BE

PURCHASED.

PROPER

SOLDERING

PROCEDURE

Only

a

small

percentage

of

Heathkit

purchasers

find

it

necessary

to

return

an

instrument

for

factory

service.

Of

these,

by

farthe

largest

proportion

function

improperly

due

to

poor

or

improper

soldering.

Correct

soldering

technique

is

extremely

important.

Good

soldered

joints

are

essential

if

the

perform-

ance

engineered

into

the

kit

is

to

be

fully

realised.

If

you

are

a

beginner

with

no

experience

in

solder-

ing,

half

an

hour's

practice

with

odd

lengths

of

wire

and

a

valveholder,

etc.,

will

be

invaluable.

Highest

quality

resin-cored

solder

is

essential

for

efficiently

securing

this

kit's

wiring

and

components.

The

resin

core

acts

as

a

flux

or

cleaning

agent

during

the

soldering

operation.

NO

SEPARATE

FLUX

OR

PASTE

OF

ANY

KIND

SHOULD

BE

USED.

We

specifically

caution

against

the

use

of

so-called

"non-corrosive"

pastes

or

liquids.

Such

compounds,

although

not

corrosive

at

room

temperatures,

will

form

residues

when

heated.

These

residues

are

deposited

on

surrounding

surfaces

and

attract

moisture.

The

resulting

compounds

are

not

only

corrosive

but

actually

destroy

the

insulation

value

of

non-conductors.

Dust

and

dirt

will

tend

to

accumulate

on

these

"bridges"

and

eventually

will

cause

erratic

or

degraded

performance

of

the

instrument.

IMPORTANT

IN

THE

"STEP-BY-STEP"

PROCEDURE

the

abbreviation

''NS"

indicates

that

the

connection

shouldnot

yet

be

soldered,

for

other

wires

will

be

added.

Ata

later

stage

the

letter

'S"

indicates

that

the

con-

nection

must

now

be

soldered.

Note

that

a

number

appears

after

each

solder

(S)

instruction.

This

number

indicates

the

number

of

leads

connected

to

the

terminal

in

question.

For

example,

if

the

in-

structions

read,

'Connect

one

lead

of

a

47

K

ohm

resistor

to

tag

1

(S-2)",

it

will

be

understood

that

there

should

be

two

leads

connected

to

the

terminal

at

the

time

it

is

soldered.

This

additional

check

will

help

to

avoid

errors.

When

two

or

more

connections

are

made

to

the

same

solder

tag

a

common

mistake

is

to

neglect

to

solder

the

connections

on

the

bottom.

Make

sure

all

the

wires

are

soldered.

GLOUCESTER

-DAYSTROM

LTD.

ENGLAND

BEND

LEAD

CLOSE

TO

BODY

=

=

=

=

PROPER

MOUNTING

ul

UA

3”.

SRLEAD

ONLY

|

|

NE

erereeS

TD

—_

f

Fal

S

_

SOLDER

on

PROPER

SOLDER

7

went

af"

ONLY

CONNECTION

.

(MF.

LEAD

WAS

MOVED

SPREAD

LEADS

OF

EACH

COMPONENT

DeapAnvened

TO

KEEP

THEM

FROM

FALLING

OUT

NO

CONNECTION

=

253s,

(NO

LEAD

ee

<

WHEN

THE

BOARD

!1S

TURNED

5

SOLDER

AND

LEAD

BRIDGES

CIRCUIT

BOARD

WIRING

AND

SOLDERING

Before

attempting

any

work

onthe

circuit

board,

read

the

following

instructions

carefully

and

study

the

figures

shown.

It

isonly

necessary

to

observe

a

few

basic

precautions

which

will

ensure

proper

operation

of

the

unit

the

first

time

it

is

turned

on.

Proper

mounting

of

components

on

the

board

is

essential

for

good

performance,

A

good

general

rule

to

follow

is

that

all

components

on

the

board

should

be

mounted

tightly

to

the

board,

unless

instructions

state

otherwise.

All

leads

should

be

kept

as

short

as

possible

to

minimize

the

effects

of

stray

capacity

in

the

wiring.

Proper

and

im-

proper

methods

of

mounting

are

illustrated

in

the

accompanying

Figures,

Tubular

capacitors

and

resistors

will

fit

properly

if

the

leads

are

bent,

as

shown.

Disc

capacitors

will

generally

fit

inplace

withno

lead

preparationother

than

determining

that

the

leads

are

straight.

Components

with

tags

norm-

ally

require

no

preparation

unless

the

tags

appear

to

be

bent,

in

which

case

they

can

be

straightened

with

a

pair

of

pliers.

Parts

should

be

inserted

as

instructed,

and

the

leads

bent

outward

slightly,

as

illustrated,

to

lock

them

in

place,

Components

will

be

soldered

in

groups:

after

a

group

of

components

have

been

installed,

instructions

will

be

given

to

solder

them.

When

the

components

have

been

soldered,

diagonal

cutters

may

be

used

to

cut

off

the

excess

leads

close

to

the

board.

The

actual

technique

of

soldering

leads

to

a

circuit

board

is

quite

simple.

Position

the

tip

of

the

soldering

iron

so

that

it

firmly

contacts

boththe

ci

rcuit

board

foil

and

the

wire

or

tag

to

be

soldered,

as

shown.

Then

the

solder

should

immediately

be

placed

between

the

iron

and

the

joint

to

be

soldered.

Remove

the

solder

as

soon

as

it

begins

to

melt

and

flow

on

to

the

leadand

foil.

Holdthe

tip

of

the

iron

in

place

only

until

the

solder

begins

to

flow

outward

over

the

foil,

Then

remove

the

iron

quickly.

USE

THE

SMALL

GAUGE

SOLDER

FOR

THE

PRINTED

BOARD,

Avoid

overheating

the

connection.

A

soldering

pencil

or

small

iron

(approximately

30

watts)

is

ideal

for

use

in

cir-

cuit

boardwork.

If

a

higher

wattage

iron

or

soldering

gun

must

be

used,

precautions

must

be

taken

to

avoid

circuit

board

damage

due

to

overheating.

The

use

of

excessive

amounts

of

solder

will

increase

the

possibility

of

bridging

between

foil

conductors

or

plugging

holes

which

are

to

be

left

open

for

wires

which

may

be

added

later

on,

If

solder

is

accidentally

bridged

across

in-

sulating

areas

between

conductors,

it

can

be

cleaned

off

by

heating

the

connection

carefully

and

quickly

wiping

the

solder

away

witha

soft

cloth.

Holes

which

become

plugged

can

be

cleared

by

heating

the

area

immediately

over

the

hole

while

gently

pushing

the

lead

of

a

resistor

through

the

hole

from

the

opposite

side,

and

withdrawing

the

lead

be-

fore

the

solder

rehardens.

Do

not

force

the

wire

through:

too

much

pressure

before

the

solder

has

time

to

soften

may

separate

the

foil

from

the

board,

In

cases

where

foil

does

become

damaged,

repairs

can

usually

be

made

with

little

difficulty.

A

break

in

the

foil

can

be

rejoined

with

a

small

piece

of

bare

wire

soldered

across

the

gap,

or

be-

tween

the

foil

and

the

lead

of

a

component.

GLOUCESTER

DAYSTROM

LTD.

ENGLAND

If

the

tags

are

bright

and

clean

and

wires

free

of

wax,

frayed

insulation

and

other

foreign

substances,

no

difficulty

will

be

experienced

in

soldering.

Crimp

or

otherwise

secure

the

wire

(or

wires)

to

che

terminal,

so

a

good

mechanical

joint

is

made

without

relying

on

solder

for

physical

strength.

1,

CRIMP

WIRES

2.

HEAT

CONNECTION

3.

APPLY

SOLDER

ALLOW

SOLDER

TO

FLOW

COLD

SOLDER

JOINT

PROPER

SOLDERED

COLD

SOLDER

JOINT

CONNECTION

INSUFFICIENTLY

CONNECTION

CONNECTION

MOVED

HEATED

WHILE

COOLING

Typical

good

and

bad

soldered

joints

are

shown

above.

A

poor

soldered

joint

will

usually

be

indicated

by

its

appearance.

The

solder

will

stand

up

in

a

blobon

topof

the

connection,

with

no

evidence

of

flowing

out

caused

by

actual

''wetting'

of

the

contact.

A

crys-

talline

or

grainy

texture

on

the

solder

surface

caused

by

movement

of

the

joint

before

it

solidifies

is

another

evidence

of

a

"cold"

connection

and

possible

"dry

joint".

In

either

event,

reheat

the

joint

until

the

solder

flows

smoothly

over

the

entire

junction,

cooling

toa

smooth,

bright

appearance.

To

make

a

good

soldered

joint,

the

clean

tip

of

the

hot

soldering

iron

should

be

placed

against

the

joint

to

be

soldered

so

that

the

flat

tag

is

heated

sufficiently

to

melt

the

solder.

Resin

core

solder

is

then

placed

against

both

the

tag

and

the

tip

of

the

iron

and

should

immediately

flow

over

the

joint.

See

ill-

ustrations.

Use

only

enough

solder

to

cover

the

wires

at

the

junction;

it

is

not

necessary

to

fill

the

entire

hole

in

the

tag

with

solder.

Don't

allow

excess

solder

to

flow

into

valveholder

contacts,

ruining

the

sockets,

or

to

creep

into

switch

sockets

and

destroy

their

spring

action.

Position

the

work

so

that

GLOUCESTER

DAYSTROM

LTD.

ENGLAND

gravity

teuds

to

keep

the

solder

where

you

want

it.

A

clean,

well-tinned

soldering

iron

is

also

important

to

obtain

consistently

perfect

connections.

For

most

wiring,

a

30

to

50

watt

iron,

or

the

equivalent

in

a

soldering

gun,

is

very

satisfactory.

Keep

the

iron

hot

and

its

tip

and

the

connections

to

be

soldered

bright

and

clean.

Always

place

the

solder

on

the

heated

"work"

andthen

place

the

bit

ontop

of

the

solder

until

it

flows

readily

and

''wets"'

the

joint

being

made.

Don't

take

the

solder

on

to

the

bit

and

then

try

to

bring

it

to

the

work

directly

from

the

solder-

ing

iron.

Whenever

possible

a

joint

should

be

secured

mechanically

by

squeezing

tight

with

pliers

prior

to

soldering

it.

The

hot

soldering

bit

should

frequently

be

scraped

clean

with

a

knife,

steel

wool

or

a

file,

or

wiped

clean

quickly

by

means

of

a

rag

or

steel

wool.

Don't

apply

too

much

solder

to

the

soldered

joint.

Don't

apply

the

solder

to

the

iron

only,

expecting

that

it

will

roll

down

onto

the

connection.

Try

to

follow

the

instructions

and

illustrations

as

closely

as

possible,

Don't

bend

a

lead

more

than

once

around

a

connecting

point

before

soldering,

so

that

if

it

should

have

to

come

off

due

to

a

mistake

or

for

maintenance

it

will

be

much

easier

to

remove.

Follow

these

instructions

and

use

reasonable

care

during

assembly

of

the

kit.

This

will

ensure

the

deserved

satisfaction

of

having

the

instrument

operate

perfectly

the

first

time

it

is

switched

on.

toc

N

ER

BSW

locating

hole.

CHASSIS

—

FRONT

VIEW-SHOWING

MOUNTING

OF

SPEAKER

AND

GROMMETS.

PICTORIAL.|I

GLOUCESTER

DAYSTROM

LTD.

ENGLAND

eer

ee

MOUNTING

OF

COMPONENTS

TO

METAL

CHASSIS

SEE

PICTORIAL

2A

Place

chassis

(Part

No,

200-102B)

on

your

workbench

as

shown

in

Pictorial

2A.

Mount

the

aerial

socket

to

chassis

at

position

SK

using

2

-

6BA

x

="

screws

with

lockwashers

and

nuts.

Mount

the

control

panel

(Part

No.

200-501B)tochassis

using

4

-

6BA

x

<''

screws

with

lockwashers

and

nuts,

Mount

the

volume

control

at

location

A.

Insert

3

small

grommets

in

the

holes

around

the

large

hole

at

location

C.

See

Pictorial

l,

Mount

the

two-gang

capacitors

at

location

C

using

3

-

4BA

x

3/8''

screws,

flat

and

lockwashers.

Tighten

these

screws

so

that

the

ends

just

appear

through

the

tapped

holes.

See

Pictorial

1,

Mount

the

wave-change

switch

at

location

BSW

using

the

location

hole

as

shown.

Bend

all

tags

outward

as

shown

in

Pictorial

2A,

This

is

to

allow

clearance

for

components

on

circuit

board

to

be

added

later,

Mount

a

4BA

solder

tag

at

location

H2

using

1

-

4BA

x

3/8"

screw

with

lockwasher

and

nut,

Mount

a

l-way

tagstrip

(with

one

earth

tag)

at

location

J

using

1

-

4BA

x

3/8''

screw

with

lock-

washer

and

nut,

Mount

the

large

transformer

at

location

TLS

using

2

-

4BA

x

3/8"

screws

with

lockwashers

and

nuts,

Mount

the

eliptical

loudspeaker

using

4

-

4BA

x

3/8''

screws

with

lockwashers

and

nuts,

See

Pic-

torial

I,

Mount

a

2-way

tagstrip

at

location

M

using

1

-

4BA

x

3/8"

screw

with

lockwasher

and

nut,

Mount

a

3-way

tagstrip

at

location

Y

using

1

-

4BA

x

3/8''

screw

with

lockwasher

and

nut,

Insert

the

two

large

grommets

at

locations

DF

and

EF.

Mount

the

ferrite

rod

aerial

through

grommets

DF

and

EF.

First

inserting

the

LW

end

through

grommet

DF

for

approximately

1",

Then

partly

withdraw

and

insert

the

other

end

through

grom-

BP.

Finally

adjust

the

ferrite

rod

centrally

with

the

BLACK

tags

facing

the

chassis

rear.

CHASSIS

WIRING

-

SEE

PICTORIAL

2B

Note:

Where

coloured

insulated

wire

is

used,

strip

back

the

insulation

q''

at

each

end

before

connecting,

(

(

)

)

Connect

a

2"'

length

of

BLACK

wire

between

tag

2

of

the

AE

coil

(S-1)

to

the

BLACK

tag

LW

(NS).

Connect

a

10"

length

of

BLACK

wire

between

tag

1

of

the

AE

coil

(S-1)

to

the

aerial

socket

SK

(S-1).

Route

as

shown.

Connect

a

3"!

length

of

BLACK

wire

between

BSW2

(NS)

and

BSW7

(S-1).

Dress

against

panel

as

shown.

Connect

a

bare

wire

link

between

BSW5

(NS),

BSW4

(S-1)

and

BSW-PI1

(S-1).

Connect

a

6"

length

of

RED

wire

between

BSW-P2

(S-1)

and

MI

(NS).

Connect

a

33''

length

of

ORANGE

wire

between

BSW10

(S-1)

and

the

ORANGE

tag

LW.

(Right-hand)

coil

on

ferrite

rod.)

(S-1).

Connect

a

35"

length

of

RED

wire

between

BSW2

(S-2)

and

the

RED

tag

LW.

(Right-hand

coil

on

ferrite

rod.)

(S-1).

Connect

a

33"length

of

GREEN

wire

between

BSW8(S-1)

and

the

GREEN

tag

MW.

(Left-hand

coil

on

ferrite

rod.)

(S-1),

GLOUCESTER

DAYSTROM

LTD.

ENGLAND

ees

72+}

/it

See

NOTE-TAGS

3,6,9,

&

12

ARE

NOT

USED

ON

SWITCH

BSW.

be

MO

Ea)

puma

a

Cit

ETT

AET

ES:

Ny

ef

MOUNTING

OF

COMPONENTS

TO

METAL

CHASSIS.

PICTORIAL

2A,

GLOUCESTER

DAYSTROM

LTD.

Biappa

i,

anaes

a

iP

AG

UCC

A

_

Ee

=a

Vs

:

“

—

——

bh

4

CHASSIS

WIRING

PICTORIAL

2B.

DAYSTROM

LTD.

]iuuuuaibestibes

GLOUCESTER