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¢