Heathkit HR-10B - Page 40

Page
31
~
.
,_
BFO
e
OJ
61oM®
"@
-
L5
@I
~
L3
20M
IQ=D
T3
-.
ISM
0
~
L2
40
M
L4
~
~
Ll
80
M
0
1oM
@
~
~
@
e
LIO
®
®
L8
20M
,_,
0
~
L7
40M
15M
'.
L9
~
®
L6
80M
1oM
@
~
~
@
LIS
~
®
Ll3
20M
e
SISM
0
®
Ll2
40
M
0
Ll4
®
®
Lll
80
M
~~
__@_
T2
\
0
'
a
~
..
Tl
Figure
2
( )
Temporarily
short
the antenna connector
to
ground. Be
sure
that
the
RF
GAIN
control
is
in
its
maximum clockwise position and the
AVC
switch
is
in the
AVC
position. Adjust
the METER
ZERO
ADJ
control
for
a
zero
reading
on the
"S"
meter.
( ) Remove the
short
from
the antenna con-
nector.
FRONT
END
AL"IGNMENT
In
order
to
obtain optimum
results
from
the
Receiver,
the
front
end
assembly
should
be
aligned with an
accurate
amplitude modulated
RF
signal
generator
and
an
AC
voltmeter.
It
is
very
important
that
the
signal
generator
be
very
accurate.
Therefore,
the
generator
should
be
calibrated
against
a
crystal
cali-
brator
or
receiver
of
known
accuracy.
If
the
HRA-1
0-1
Crystal
Calibrator
has
been
pur-
chased,
it
should be
fiSSembled
at
this
time
and
used
to
calibrate
the \signal
source.
'
.
When
performing
the following
steps,
bear
in
mind
that
the
front
end
assembly
has
been
preset
by
the
manufacturer,
however, due
to
differences
in
tubes
and
assembly
techniques,
some
realignment
will
be
necessary.
Usually
this
will
consist
of not
more
than
1/2
turn
of
the coil
slugs.
)l