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Heathkit HA-14 - Amplifier Connections; SB-400 Transmitter Connection

Heathkit HA-14
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Page
30
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HBATHREIT?
INITIAL
TEST
NOTE:
The
following
tests
are
made
without
high
voltage
from
the
Power
Supply
connected
to
the
Linear
Amplifier,
cea)
Plug
the
power
cable
socket
onto
the
POWER
"plug
on
the
rear
apron
of
the
Linear
Ampli-
fier,
Connect
the
other
end
of
this
cable
to
the
Power
Supply,
DO
NOT
connect
the
high
voltage
lead,
i
Connect
the
Power
Supply
to
the
appropriate
power
source,
Turn
ON
the
Linear,
The
pilot
lamp
and
tube
filaments
should
light,
BA
e)
Using
a
20,000
ohm/volt
meter
or
VTVM,
measure
the
voltage
at
pin
3
of
tubes
VI
and
V2,
This
voltage
should
be
approxi.
mately
-120
volts
DC,
using
the
HP-14
and
approximately
-150
volts
DC
using
the
HP-24,
If
not,
refer
to
the
In
Case
Of
Difficulty
section
on
Page
36,
(
~
(4
Touch
the
center
pin
of
the
Antenna
Relay
coaxial
cable
to
the
chassis,
CAUTION:
DO
NOT
touch
the
center
pin
with
your
hand
as
it
has
-120
volts
DC
present,
When
this
point
touches
the
chassis
the
antenna
relay
should
close,
(
)
With
the
antenna
relay
closed,
again
meas-
ure
the
voltage
at
pin
3
of
tubes
Vi
and
V2,
It
now
should
be
approximately
-2
volts
DC,
()
Turn
the
power
supply
off
and
disconnect
the
power
cable
from
the
Linear
Amplifier,
This
completes
the
Initial
Test,
Continue
with
Final
Assembly,
FINAL
ASSEMBLY
Refer
to
Pictorial
17
for
the
following
steps,
NOTE:
Two
different
sizes
of
rubber
feet
are
*
provided
to
permit
various
types
of
installations,
The
method
described
in
this
section
permits
a
slight
backward
tilt
of
the
Linear
Amplifier
for
easy
operation
of
the
controls.
Three
different
suggestions
for
mobile
mounting
are
shown
on
Page
32,
If
the
Linear
Amplifier
is
mounted
to
another
unit,
use
the
short
rubber
feet
and
the
6-32
x
5/8"
screws,
The
seams
of
the
cabinet
should
be
placed
on
the
bottom,
()
Mount
a
short
rubber
foot
on
each
rear
corner
of
the
cabinet,
Measure
in
from
the
side
and
rear
of
the
cabinet
as
shown,
Secure
the
feet
with
a
6-32
x
3/8"
screw,
a
#6
flat
washer,
a
#6
lockwasher,
and
a
6-32
nut,
The
screw
passes
through
the
perforated
holes
in
the
cabinet,
These
dimensions
are
approximate,

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