Table of Contents
Advertisement
SECTION IX
MODEL MARK IIA POWER SUPPLY
9-1.
SPECIFICATIONS.
Type of Circuit.........
Full-wave
center
tapped
rectifier
circuit.
Power Requirements, AC...1200
watts,
115
volts
or
230
volt
60 cycles.*
Power Output
..........-
3,000
volts
DC
at
350 milliamperes.
Overall
Dimensions......
14 inches
wide x10
inches
high
x
12
inches deep.
Net Weight
.......-:.-.-.
58 pounds.
Shipping Weight.........
75 pounds. **
* Input circuit may be connected
for either 115
volt
AC,
60 cycle or 230 volt AC, 60 cycle,
grounded neutrai
operation.
**Shipping weight is total for both cartons; cover
is shipped in separate fiberboard carton.
9-2.
MARK
IIA POWER
SUPPLY.
The
Hallicrafters'
Mark IIA Power Supply,
shown
in figures 8 and 9, is designed as a com-
panion unit for the HT-45
Mark
ITA RF
Linear
Power
Amplifier.
The power supply is sold as an
accessory
item
to
permit
the
purchaser
of a
Hallicrafters' HT-45 Mark IIA RF Linear Ampli-
fier to choose either a matching power supply or
utilize
a home
constructed
supply,
capable
of
delivering
the
required
current
and
voltage.
¢
WARNING
High voltages are present at all points
in the power Supply. Observe all safety
procedures
afforded
to
high-voltage
components.
Before
touching
any ter-
minals
in the supply,
check
the input
power for proper disconnection and dis-
charge
the
filter
capacitor
with
a
wooden
stick having a metal extension
capable of shorting the filter to ground.
The Mark ITA Power Supply is designed for
remote
operation
from
controls
located on the
front panel of the linear amplifier. The power and
control
lines are terminated
at a ten-connector
barrier-type
terminal
strip for ease of connec-
tion.
The
primary
input power
is terminated at
these
terminals
and
is
routed
to
and
through
control circuits in the linear amplifier. The over-
all
schematic
diagram
of the Model
Mark
IIA
Power Supply is shown in figure 8.
The power
supply utilizes, two type 866A,
mercury
vapor rectifiers in a full-wave, center-
tapped
circuit.
The
rectified
output is smoothed
and filtered by a wide-range swinging choke anda
large value of filter capacitance. This configura-
tion provides
the static and dynamic
reguiation
characteristic necessary.
Application of primary
power
to the power
supply
is controlled
by two
switches
on the linear amplifier and a controlled
relay in the power supply.
Connections
to the Mark ITA Power Supply
are shown in figures 2 and 8, the interconnection
diagram
and
the
overall
schematic
diagram
respectively.
In the event
an
existing
supply or
home constructed Supply is used, careful attention
must be given to the interconnection of control and
power lines.
The Mark IIA Power Supply may be shipped
from
the
factory
connected
either for 115 volt
AC
or
230
volt
AC,
60
cycle,
single-phase,
neutral-ground
operation.
In either
event,
con-
nections
for desired
input source
may
be made
by referring
to figures
2 and 8 and making the
alternate connections at terminal boards TB1 and
TB2 of the Power Supply.
9-3.
MARK
IIA POWER
SUPPLY,
PARTS LIST.
In the event
repair or replacement
parts
are
required
for
the
Mark
IIA Power
Supply,
refer to the schematic diagram, figure 8, and the
parts list to determine the exact replacements.
In
the event replacement parts are required and re-
quests
are directed
to the factory, the following
information must be furnished.
+15
Advertisement
Table of Contents
