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Heathkit AR-14 - ALIGNMENT WITH INSTRUMENTS; IF Alignment Procedure

Heathkit AR-14
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Page
59
ALIGNMENT
WITH
INSTRUMENTS
This
alignment
procedure
requires
the
use
of
test
equipment.
It
should
only
be
performed
by
those
who
have
instrument
alignment
exper-
ience.
( )
Set
the
Receiver
controls
as
follows:
IF ALIGNMENT
SOURCE
switch
to
@
FM.
PHASE
switch
pushed
in.
TUNING
to
low
frequency
end
of
dial.
Equipment
needed:
A
high
impedance
input
DC
VTVM,
and
an
RF
generator
that
is
accurate
at
10. 7
me.
A
Heathkit
VTVM
and
the
Heath-
kit
FMO-1
Test
Oscillator,
or
their
equiv-
alents,
may
be
used.
Refer
to
Figures
4
and
5
(fold-out
from
Page
65)
for
coil,
transformer,
and
TP
(test
point)
locations.
Complete
the
adjustments
given
in
the
Alignment
Chart
below.
IF ALIGNMENT CHART
RF
GENERA
TOR
VTVM
ADJUST
PREPARATION
Connect
Frequency
Connect
For
VTVM
To
And
To
Transformer
Reading
Output
10. 7
me
(without
Bottom
slug
modulation).
Set
of
T6
generator
output
TPl
for
2
volts
on
VTVM.
Connect
a
jumper
Maximum
wire
between
Top
and
bottom
reading.
points
X
and
Y
slugs
of
T5
on
the
FM-
Antenna
Multiplex
input
Top
and
bottom
circuit
board.
terminals.
10. 7
me
(without
slugs
of
T4
modulation).
Re-
duce
generator
TPl
Top
and
bottom
output
to
maintain
slugs
of
T3
2
volts
on
VTVM.
Top
and
bottom
slugs
of
T2
Repeat
each
step
above
until
no
further
improve-
ment
is
obtained.
Top
slug
of
..
TP2
T6
Zero
Remove
jumper
Antenna
If
necessary,
reading.
wire
from
between
input
10. 7
me
without
TP2
readjust
top
points
X
and
Y.
terminals.
modulation.
slug
of
T6.

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