Heathkit Hp-23a User manual

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EBATH

RII”

ASSEMBLIY

MANUAL,

Gegucarncarr

AC

POWER

SUPPLY

MODEL

HP-23A

Assembly

and

Operation

of

the

AC

POWER

SUPPLY

MODEL

HP-23A

TABLE

OF

CONTENTS

Introduction,

.

..

PANE

lA.

sawierovsewsiowereewee

|

8

Step-By-Step

Assembly

Chassis

Parts

Mounting,

....

4

Transformer

Wiring...

s+

1

Chassis

Wiring,

.

.

ae

7

Component

Installation,

8

Final

Wiring...

646+

10

Final

Assembly,

ae

i

Initial

Tests,

..

1

sec

cevccvcvccee|

12

Operation...

....4

+13

In

Case

Of

Difficulty,

...sseeveeves

4

Troubleshooting

Chart...

1.

.sseeeee

15

Specifications,

....

.

[16

Circuit

Description,

.....6.eeeeeeee

IT

Schematic

(fold-out

from

page)...

.

++.

[17

Chassis

Photograph,

..

esses

seee

18

Factory

Repair

Service,

,

,(fold-out

from

page),

...«

sranaiy

new

[18

Replacement

Parts Price

List...

......

[19

HEATH

COMPANY

BENTON

HARBOR,

MICHIGAN

49022

Page

2

INTRODUCTION

‘The

Heathkit

Model

HP-23A

AC

Power

Supply

is

designed

to

provide

all

the

necessary

operat-

ing

voltages

for

fixed

station

operation

of

Heathkit

amateur

radio

transceivers,

The

versa~

tility

and

many

features

of

this

Power

Supply

also

make

it

ideal

for

use

with

many

other

types

of

amateur

radio

equipment,

‘The

Power

Supply

features

a

high

voltage

source,

a

choice

of

two

low

voltage

sources,

fixed

and

adjustable

bias

sources,

and

6,3

and

12,6

volt

filament

sources,

Extensive

filtering

and

good

regulation

is

provided

for

the

DC

sources,

The

power

transformer

has

a

dual

primary

winding

which

can

be

connected

for

operation

from

either

120

or

240

VAC

power

lines.

A

series

connection

is

provided

at

the

power

output

socket

to

permit

turning

the

Power

Sup-

ply

on or

off

remotely

from

the

equipment

with

which

it

is

used,

A

toggle

switch

on

the

Power

Supply

is

used

to

select

the

value

of

low

B+

voltage

available

at

the

output

socket,

The

switch

also

will

turn

off

the

Power

Supply,

A

circuit

breaker

in

the

primary

circuit

provides

over-

load

and

short

circuit

protection,

All

output

voltage

connections

from

the

Power

Supply

are

made

through

the

power

output

socket

on

the

chassis,

This

provides

an

easy

means

of

rapidly

changing

the

equipment

from

mobile

to

fixed

station

operation,

Refer

to

the

Kit

Builders

Guide

for

complete

information

on

unpacking,

parts

identification,

tools,

wiring,

soldering

and

step-by-step

assem-

bly

procedure:

aes

_

Page

3

PARTS

LIST

To

order

replacement

parts,

refer

to

the

Replacement

Parts

Price

List

and

usethe

Parts

Order

Form

furnished

with

this

kit,

PART

PARTS

DESCRIPTION

No,

Per

Kit,

RESISTORS

(1)1-9-1

2

10

kQ

1

watt

(brown-black-

orange)

(21-15-20

1

1

kM

2

watt

(brown-black-

red)

1-24-25

100

k@

2

watt

(brown-black-

yellow)

CAPACITORS

(3)25-19

2

20

uF

electrolytic

25-36

1

40

UF

electrolytic

(4)25~34

4

125

F

tab-mount

electrolytic

HARDWARE

#6

Hardware

(5)250-8

8

#6

x

3/8"

sheet

metal

screw

(6)250-89

8

6-32

x

3/8"

screw

(7)

252-3

8

6-32

nut

(8)

254-1

9

#6

lockwasher

#8

Hardware

(99250-1376

8-32

x

3/8"

screw

(10)252-4

10

8-32

nut

(11)254-2

10

#8

lockwasher

(12)259-2

2

#8

solder

lug

NOTE:

The

numbers

in

parentheses

are

keyed

to

the

numbers

on

the

Parts

Pictorial

(fold-out

from

Page

3).

PART

PARTS

DESCRIPTION

No.

Per

Kit

MISCELLANEOUS

(13)10-57

3

10

k&

tab-mount

control

(14)

57-27

¥

Silicon

diode

(15)431-40

1

4-lug

terminal

strip

(16)431-55

1

6-lug

terminal

strip

(17)

481-1

2

Metal

capacitor

mounting

wafer

481-3

2

Phenolic

capacitor

mounting

wafer

(18)438-29

1

11-pin

plug

(19)

440-1

1

Plug

cap

(20)434-118

1

11-pin

socket

(21)435-1

1

Socket

mounting

ring

(22)61-12

1

DPDT

toggle

switch

(23)65-17

1

Circuit

breaker

(24)73-1

1

3/8"

grommet

(25)73-4

1

5/16"

grommet

54-198

1

Power

transformer

46-22

1

Filter

choke

200-505

1

Chassis

205-168-1

1

Bottom

plate

100-538-1

1

Cabinet

shell

(26)261-6

4

Rubber

foot

347-18

1

8-wire

cable

346-1

1

Black

sleeving

89-19

1

Line

cord

391-341

Blue

and

white

label

490-5

1

Nut

starter

597-260

1

Parts

Order

Form

597-308

1 Kit

Builders

Guide

1

Manual

(See

front

cover

for

part

number.)

Solder

Page

4

a

ga)

STEP-BY-STEP

ASSEMBLY

NOTE:

Before

you

begin

to

assemble

this

kit,

refer

to

the

Kit

Builders

Guide

for

complete

information

on

wiring,

soldering

and

step-by-

step

assembly

procedures,

As

you

perform

a

step

in

the

Step-By-Step

As-

sembly,

first

read

the

step

completely

through,

Then

perform

the

operation

as

directed,

Position

each

part

and

wire

as

shown

in

the

Pictorial

that

accompanies

the

series

of

steps,

The

Details

provide

specific

information

for

individual

steps,

Lockwashers

and

nuts

will

be

used

with

most

screws

when

mounting

parts,

unless

the

step

directs

otherwise,

Consequently,

only

the

size

and

type

of

hardware

to

be

used

will

generally

be

called

out

in

a

step,

For

example,

the

phrase

"Use

6-32

x

3/8"

hardware”

means

to

use

a

6-32

x

3/8"

screw,

one

or

more

#6

lockwashers,

and

a

6-32

nut,

Refer

to

the

Details

associated

with

the

step

for

the

proper

installation

of

the

hardware

and

the

correct

number

of

lockwashers,

CHASSIS

PARTS

MOUNTING

Refer

to

Pictorial

1

for

the

following

steps,

(_)

Install

the

10

k@

tab-mount

control

at

A

on

the

chassis

as

shown

in

Detail

1A,

Position

the

control

lugs

as

shown

in

Pictorial

1,

Secure

the

control

by

bending

the

tabs

against

the

chassis

as

shown,

Beno TABS

INSERT

CONTROL

ag

in

Store

TOWARD

HOLE

TAOS

IN

SLOTS

Detail

1A

HOLD

THE

SOCKET

IN

THE

CHASSIS

HOLE

AND

PLACE

ONE

END

OF

THE

RING

INTO

THE

GROOVE

OF

THE

SOCKET.

USING

A

SCREWDRIVER,

PRESS

THE

RING

INTO

THE

GROOVE

AROUND

THE

SOCKET

Detail

18

(_)

Refer

to

Detail

1B

and

mount

the

11-pin

socket

at

B

with

the

keyway

positioned

as

shown,

Use

the

socket

mounting

ring.

(_)

Install

the

3/8"

grommet

in

hole

C,

()

Install

the

5/16"

grommet

in

hole

D,

NOTE:

The

Heath

Company

has

provided

a

plastic

nut

starter

with

this

kit,

Use

this

nut

starter

to

hold

and

start

6-32

nuts

on

screws,

Refer

to

Page

3

of

the

Kit

Builders

Guide,

s3200/8"

screw

Detail

1¢

Page

5

NOTE:

To

insure

a

good

ground

connection,

on

the

underside

of

the

chassis

scrape

away

a

small

amount

of

paint

around

the

mounting

holes

for

the

solder

lugs

at

M,

the

terminal

strip

at

L,

and

the

two

holes

each

for

capacitors

H

and

K,

()

Refer

to

Detail

1C

and

install

a

etal

capacitor

mounting

wafer

at

H

and

a

6-

terminal

strip

at

J,

Install

the

‘mounting

wafer

on

the

top

of

the

chassis

and

the

ter-

minal

strip

under

the

chassis,

Use

6-32

x

3/8"

hardware,

Position

the

terminal

strip

as

shown

in

the

Pictorial,

Be

sure

to

use

two

lockwashers

with

all

terminal

strips,

(_)

Mount

the

other

metal

capacitor

mounting

wafer

on

top

of

the

chassis

at

K,

Use

6-32

x

3/8"

hardware,

()

In

like

manner,

mount

phenolic

capacitor

mounting

wafers

on

top

of

the

chassis

at

F

and

G,

Use

6-32

x

3/8"

hardware,

(_)

Refer

to

Detail

1D

andprepare

the

mounting

foot

of

a

4-lug

terminal

strip,

Cut

the

front

of

the

foot

with

diagonal

cutters,

then

spread

the

cut

until

an

8-32

screw

will

fit

through

the

hole,

This

terminal

strip

will

be

mounted

with

the

filter

choke

in

the

following

steps.

Detail

1D

Oy

wy

1"

deni

Hii

Locewaswer

Detail

1E

(

)

Cut

both

leads

of

the

filter

choke

toa

length

(

of

4-1/2",

and

remove

1/4"

of

insulation

from

the

cut

end

of

each,

Measure

the

leads

from

where

they

leave

the

choke,

Apply

a

small

amount

of

solder

to

the

end

of

each

lead

after

cutting,

Refer

to

Detail

1E

and

position

the

filter

choke

on

top

of

the

chassis

with

its

leads

through

grommet

D,

Mount

the

choke

with

8-32

x

3/8"

hardware

at

L

and

M,

with

the

prepared

4-lug

terminal

strip

at

L

and two

#8

solder

lugs

at

M,

Be

sure

to

use

two

lockwashers

with

the

terminal

strip,

Posi-

tion

the

solder

lugs

and

terminal

strip

as

shown,

Bend

the

end

of

the

solder

lugs

up

away

from

the

chassis,

Page

6

eas

MEASURE

ALL

LEADS

FROM

WHERE

THEY

LEAVE

THE

TRANSFORMER.

BLK

3-1/2"

BUK-GRN

3-112

BLK-RED

3-1/2"

BLC-YEL

3-1/2"

REDS

RED-YEL

6°

vets

GRN-YEL

5

RN

5

BLU

a

BRN

(00

NOT

Cul)

Detail

1F

NOTE:

Use

the

scale

on

the

fold-out

from Page

9

for

measuring

wires

in

the

following

step.

()

Refer

to

Detail

1F

and

cut the

Power

Transformer

leads

to

the

following

lengths

(measured

from

where

they

leave

the

trans-

former):

WIRE

COLOR

—

LENGTH

Black

3-1/2"

Black-green

3-1/2"

Black-red

3-1/2"

Black-yellow

3-1/2"

Red

sr”

Red-yellow

6"

Yellow

sr"

Yellow-brown

—_—_

do

not cut

Green-yellow

5"

Green

st

Blue

4a"

Brown

do

not

cut

(_)

Remove

1/4"

of

insulation

from

the

end

of

each

cut

transformer

lead,

and

melt

asmall

amount

of

solder

on

the

bared

end

to

hold

the

wire

strands

together,

(_)

Mount

the

power

transformer

in

the

large

cutout

on

the

chassis

as

shown

in

Detail

1G,

Use

#8

lockwashers

and

8-32

nuts,

(_)

Refer

to

Detail

1#

and

install

125

uF

tab-

mount

electrolytic

capacitors

in

the

mount-

ing

wafers

at

F,

G,

H,

and

K,

Insert

the

capacitor

lugs

into

the

wafers,

making

sure

that

the

connecting

lug

of

each

capacitor

is

oriented

as

shown

on

the

Pictorial,

Then

twist

each

mounting

lug

1/8

turn,

B32

nur

$

#8

LocKwasHir

Detail

1G

VENT

THE

CAPACITOR

AS

SHOWN

IN

THE

CFORIAL,THEN

PUSH

THE

LUGS.

OF

THE

CAPACITOR

INTO

THE

SLOTS

OF

THE

WAFER.

WHILE

HOLDING

THE

CAPACITOR

IW

PLACE,

TWIST

TACH

OF

THE

MOUNTING

LUGS

APPROXIMATELY

Wa

TURN

Detail

1H

az

Page

7

This

completes

the

Chassis

Parts

Mounting,

CAUTION:

When

the

chassis

is

bottom

side

up,

its

weight

will

rest

on

the

transformer

and

the

mounted

capacitors,

Take

care

that

you

do

not

damage

the

capacitors

during

the

remainder

of

the

assembly,

TRANSFORMER

WIRING

Refer

to

Pictorial

2

(fold-out

from

Page

9)

for

the

following

steps,

Position

all

wires

andleads

as

shown,

Connect

the

power

transformer

leads

as

follows:

LEAD

COLOR

=

CONNECT

TO

()

Red

lug

2

of

terminal

strip

J

(NS),

()

Blue

lug

4

of

terminal

strip

J

(NS),

(.)

Red-yellow

lug

1

of

capacitor

H

(NS).

()

Green-yellow

lug

6

of

socket

B

(S-1),

()

Green

lug

8

of

socket

B

(S-1),

()

Yellow

lug

2

of

socket

B

(8-1).

(_)

Route

the

brown

and

yellow-brown

leads

as

shown

in

the

Pictorial,

These

leads

will

be

connected

later,

Alternate

Line

Voltage

Wiring

The

power

transformer

in

this

Power

Supply

is

equipped

with

a

dual

primary

winding,

It

maybe

operated

from

either

105-125

VAC

or

210-250

VAC,

depending

on

the

way

in

which

the

primary

leads

are

connected,

Two

sets

of

wiring

instruc-

tions

are

given,

Use

only

the

instructions

which

apply

to

the

line

voltage

that

you

intend

to

use.

120

VAC

Wiring

Refer

to

Pictorial

2,

()

Connect

the

black-yellow

and

black-red

transformer

leads

to

lug

9

of

socket

B

(S-2),

(_)

Connect

the

black

and

black-green

trans-

former

leads

to

lug

6

of

terminal

strip

J

(NS).

240

VAC

Wiring

Refer

to

Detail

2A,

()

Connect

the

black-red

transformer

lead

to

lug

9

of

socket

B

(S-1),

()

Connect

the

black

transformer

lead

to

lug

6

of

terminal

strip

J

(NS),

()

Connect

the

black-green

and

black-yellow

transformer

leads

to

lug

5

of

terminal

strip

J

(8-2),

CHASSIS

WIRING

()

Connect

the

red

filter

choke

lead

extending

through

grommet

D

to

lug

1

of

capacitor

K

(NS).

( )

Connect

the

black

filter

choke

lead

extending

through

grommet

D

to

lug

1

of

terminal

strip

L

(NS),

()

Cut

a

9"

length

of

the

8-wire

cable,

Refer

to

Detail

2B

and

remove

the

individual

wires

from

the

9"

cable,

These

wires

will

be

used

in

the

following

steps.

S-WIRE

CABLE

Detail

2B

Page

8

SEs

NOTE:

In

the

following

step

you

will

bedirected

to

prepare

wires

for

connection,

To

prepare

a

wire,

cut

it

to

the

stated

length

and

remove

1/4"

of

insulation

from

each

end,

Melt

a

small

amount

of

solder

onto

each

exposed

end

to

hold

the

wire

strands

together.

(()

Prepare

the

following

lengths

of

wire.

The

wires

are

listed

in

the

order

in

which

they

will

be

used.

()

Connect

@

1-1/2"

red

wire from

lug

1

of

capacitor

H

(NS)

to

lug

2

of

eapacitor

F

(NS).

()

Connect

a

5"

red

wire

from

lug

4

of

socket

B(S-1)

to

Jug

1

of

capacitor

F

(NS).

()

Connect

an

8"

orange

wire

from

lug

3

of

socket

B

(S-1)

to

lug

1

of

terminal

strip

L

(NS).

()

Connect

an

8”

yellow

wire

from

lug

1

of

socket

B

(S-1)

to

lug

3

of

terminal

strip

L

(NS).

()

Connect

2-1/2”

brown

wire

from

Ing

7

of

socket

B

(S-1)

to

lug

4

of

capacitor

H

(S-1).

Also

solder

lug

4

to

the

mounting

wafer

(S-1).

()

Connect

a

9”

green

wire

from

lug

11

of

socket

B

(S-1)

to

lug

2

of

control

A

(S-1).

COMPONENT

INSTALLATION

Refer

to

Pictorial

3

for

the

following

steps,

NOTE:

All

resistors

used

are

2

watt

unless

specified

otherwise

in

the

steps,

()

Connect

a

100

k®

(brown-black-yellow)

resistor

from

lug

2

of

capacitor

H

(S-1)

to

lug

5

of

capacitor

F

(S-1),

Apply

enough

heat

and

solder

to

lug

2

of

H

to

solder

it

to

the

mounting

wafer,

()

Connect

a

100

k®

(brown-black-yellow)

resistor

from

lug

1

of

capacitor

H

(8-3)

to

lug

1

of

capacitor

F

(NS),

)

Connect

a

100

k®

(brown-black-yellow)

re-

sistor

from

lug

5

of

capacitor

H

(8-1)

to

lug

2

of

capacitor

F

(S-2),

)

Connect

a

100

k®

(brown-black-yellow)

re-

sistor

between

lugs

1

(NS)

and

4

(S-1)

of

capacitor

F,

)

Install

a

1-1/4”

length

of

black

sleeving

on

one

lead

of

a

100

kf

(brown-black-yellow)

resistor,

Then

connect

this

lead

to

lug

1

of

terminal

strip

L

(NS),

Connect

the

other

lead

to

the

indicated

solder

lug

at

M

(NS),

)

Connect

a

1000

&

(brown-black-red)

re-

sistor

from

lug

3

(NS)

to

lug

4

(NS)

of

terminal

strip

L,

)

Connect

a10k0

(brown-black-orange)

1

watt

resistor

from

lug

1

of

control

A

(8-1)

to

lug

2

of

terminal

strip

L

(8-1),

)

Connect

a10k®

(brown-black-orange)

1

watt

resistor

from

lug

3

of

control

A

(S-1)

to

lug

3

of

terminal

strip

L

(NS),

)

Connect

the

positive

(+)

lead

of

the

40

uF

electrolytic

capacitor

to

lug

1

of

terminal

strip

L

(S-4),

Connect

the

other

lead

to

the

indicated

solder

lug

at

M

(S-1),

Position

this

capacitor

as

shown

in

the

Pictorial,

)

Cut

the

negative

(-)

leads

of

each

of

the

two

20

uF

electrolytic

capacitors

toa

length

of

1-1/4",

Then

install

1"

lengths

of

black

sleeving

on

the

negative

leads,

)

Connect

the

positive

(+)

lead

of

one

of

the

20

uF

lectrolftic

capacitors

to

the

indicated

solder

lug

at

M

(NS),

Connect

the

negative

lead

to

lug

3

of

terminal

strip

L

(8-4),

Po-

sition

this

capacitor

next

to

the

40

uF

ca-

pacitor

installed

previously,

)

Connect

the

positive

(+)

lead

of

the

other

20

uF

electrolytic

capacitor

to

the

indicated

solder

lug

at

M

(8-3),

Connect

the

negative

lead

to

lug

4

of

terminal

strip

L

(NS),

cATHOUE

ae

NOTE

WHEN

INSTALLING

DLODES.

BE

suRE

TO

PLACE

THE

CATHODE

ENO

AS

DIRECTED.

THE

CATHOOE

END

15

MARKED

WITH

CITHER

A

COLOR

PICTORIAL

3

END

COLOR

DOT.

COLOR

BAND, OR

A

SYMBOL

symaot

\eATWODE

tor

color

cook ctor

Detail

34

Refer

to

Detail

3A

to

identify

the

cathode

leads

of

the

silicon

diodes

that

will

be

used

in

the

following

steps,

( )

Connect

the

cathode

lead

of

a

silicon

diode

to

lug

1

of

capacitor F

(S-4),

Connect

the

other

lead

to

lug

1

of

terminal

strip

J

(NS),

()

Connect

the

cathode

lead

of

a

silicon

diode

to

lug

1

(8-2)

andthe

other

leadto

lug

2

(NS)

of

terminal

strip

J.

(_)

Connect

the

cathode

lead

of

a

silicon

diode

to

lug

2

(S-3)

and

the

other

leadtolug

3

(NS)

of

terminal

strip

J.

()

Connect

the

cathode

lead

of

a

silicon

diode

to

lug

3

(S-2)

and

the

other

lead

to

lug

4

(S-2)

of

terminal

strip

J,

()

Connect

the

cathode

lead

of

a

silicon

diode

to

lug

1

of

capacitor

K

(S-2),

Connect

the

other

lead

to

lug

1

of

capacitor

G

(NS),

()

Connect

the

cathode

lead

of

a

silicon

diode

to

lug

1

of

capacitor

G

(S-2),

Connect

the

other

lead

to

lug

5

of

capacitor

K

(S-1).

Apply

enough

heat

and

solder

to

lug

5

to

solder

it

to

the

mounting

wafer,