Realistic STA-115 - Set BASS, TREBLE

Equipment
Required
1.
AM standard
signal
generator
2. Standard
loop
antenna
3.
Oscilloscope
4.
AC voltmeter
5.
Distortion
meter
Set-Up
Connect standard
loop
antenna to
signal
na.
Connect
oscilloscope,
AC
voltmeter
and
Adjustment Check
AM lF
&
RF Alignment
Notes:
o
Signal
generator
output
should
be no higher
than
necessary
to
obtain an
output reading.
o
Maintain voltage
at 12O volts
AC, 60
Hz
(U,S.A.,
Canada).
(Use
240 volts
AC, 50 Hz
for
Australian
models.)
f-
lo
Set
SELECTOR
switch to AM.
I
o
Set BASS,
TREBLE
and
BALANCE
to
""nt"r;l
1Y"r,t"l11rrr,
_____l
Figure 27
standard
generator
and radiate
signal
distortion meter to
TAPE
OUT
jack.
into the
AM anten-
TAPE
OUT
(
LdR)
STEP
SIGNAL
GENERA-
TOR
FREOUENCY
DIAL
SETTING
INDICATOR
ADJUSTMENT
REMARKS
455 kHz
(400
H2,30%
mod.)
Point
of
non-
i nterference
(near
600 kHz)
a
AC voltmeter
Io
oscilloscope
I
I
o
Distortion
.et.rJ
T203,204,205
(AM
IFT)
Adjust for maximum
reading
on
meter.
2
52O kHz
(400
H2.30%
mod.)
Tuning
gang
f ully
closed.
;ame
as above
L206
(AM
OSC Coil)
same as above
3
1620 kHz
(4O0
H2,30% mod.)
Tuning
gang
fully opened.
;ame as above
rc202
(AM
OSC
Trimmer)
same as above
4
600 kHz
(400
Hz;30% mod.)
600
kHz
;ame
as above
L203
(AM
ANT.
Coil)
same as above
5
1
400
kHz
(400
H2,30%
mod.)
1400
kHz
;ame
as
above
TC2O1
(AM
ANT.
Trimmer)
same
as above
6 Repeat
steps 4 and
5 until no
further change
is noticed.
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