Heathkit GR-78 - Page 6

ADJUSTMENT
AND
NOISE
TEST
12
Figure
4
oke-out
frm
Page
73)
forthe
follwing
I
you
do
not
abtain
the
correct
results
in
ony
ofthe
ing
tots,
turn
OFF
the
Receiver
and
eter
t
the
In
of
Difelty
section
ofthe
Manual.
Connect the speaker leas,
[)
Tum
on
the
Receher,
Adjust
the
METER
ADJUST
ori
with
a
sal
screwaeiver
so
the
metre
it
‘betwean
the
O
(zero)
and
thet
(one)
on
the
sale.
You
should
hear
background
noise.
(You
shoul
also
be
able
4
increas
and
decreae
the
note
with
the
AF
GAIN
control)
Now
incre
the
AF
GAIN
control
until
the
‘bckaround
noise
Is
louder
than
the
average
listening
level
‘Touch
the
metal
tip
of
@
small
srewtevr
to
the
Indleated
end
ofthe
resistor
shown
inthe
Figure.
Then
lice
your
linger
against
the
metal
shaft
of
the
‘erontrver,
The
background
noite
should
incre
sly,
))
Plce
the
AN-CW/SSB
switch
In
the
AM
poston,
The
background
nose
should
dcreae
in
volume,
Pace
the
ANLOFF
sviteh
In
the
ANL
poston.
There
‘ould
be
8
further
decrease
in
th
background
nae
volume,
Pro
the
LIGHT
mite,
Both
pana
omg
should
ght,
Puce
the
RCV.STBY
switch
inthe
STBY
position,
The
background
noite
should
stop,
Then
tun
the
switch
to
the
RCV
postion,
Turn the Receiver off,
is
completes
the
Initial
Tests
section
ofthe
Manus.
Figure 3A