your purchase
With
pleted
a chain
research laboratories.
the
equipment
g5l,:Xr;J"".r,
the
But
has now opened, for
door
unlimited
the keys
end
years
1o
its
step-your
of a
of events
For it is there ihat
you
have
.functions,
musical enjoyment. Recognizing that one of
of
pleasurable
designed this instrument
fact, instruments we made
In
are siill
in
use today.
a}
a-';
FISHER instrument
{-
::
you
{
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have com-
that began many months ago, in
basic
just
acquired came
quality
its
purchase-is
you
and
the
performance,
of
merely a beginning. A
your
family,
ownership is reliability,
give
to
long and trouble-free service.
twenty-seven
over
concept of
into being-its
its con-
virtually
on
we
years
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our
have
ago
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Remember always
ihe best
any
write
performance
time need
personally.
me
AN IMPOF,TANT
hours have been speni by our engineers
Many
writers to
enjoyment.
only one
create
you
lf
way to obtain it. With
read this booklet carefully.
*kuga,,
that
we want
which it is
of
our assistance
toward
SUGGESTION
instruction
this
want the mosi out of
the
equipment before
lt will be time well spent!
leA
tt€4a-
(
this
equipment
capable.
that
book for
your
give you
to
Should
objective,
you
please
and technical
your guidance
FISHER, there
you, please
Fosnder and
pre.,csn:
at
and
is
l::-t'--:r:>:':-:,?:a
:.4,i,
First high-fidelity
power
amplifier, inverse
compartments
masnetlc cartridses.
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Firit
exclusively-high
broad-tuning
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First two-unit
speaker
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First high fidelity turer
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First 3-Way Speaker
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Center-of-Channel
Preamplifier-Equalizer
First
graph
equalization.
First Dynamic Range Expander
First FM"AM Tuner
First
50-Watt, all
First self-Dowered
First self-powered
system for high fidelity use.
First Universal Horn-Type
room location and any speaker.
First FM.AM Receiver
)a
First low-cosl electronic Mixer-Fader.
First moderately-priced,
meters.
TWo
peak power
First
Masier
First
mixins facilities.
First
correct!y
sound systems featuring
(infiniie
baffle and bass reflex)
fidelity TRF tuner,
cycle tidelity.
20,000
high fidelity system
enclosure.
speaker system.
in a high fidelity system.
Tuning
with variable
triode amplifier.
Master
electr0nic,
with a
Indicator in high fidelity.
Audio Control Chassis
equalized, direct tape-head
.ara=a:at"!.':,:r--
feedback, acousiic speaker
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a beam.
and
featuring
with
separate
with amplified
with
Audio Control.
AVC.
indicator.
selective
with feedback.
AFC.
phono-
sharp-cut-off
filter
Speaker Enclosure for any
Front End.
Cascode
professional
FM Tuner with
wiih {ive-positi0n
master
'1,::.i::
a.7:.
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First dual dynamic
u se.
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First Performance Monitor in
home
fier for
laa:.
First FM-AM
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First complete
bass and ireble.
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First Golden Cascode
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First MicroRay
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First
Stereo Cartridge.
at:a."1
First
a-;
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First complete Stereophonic
AM tuner, audio control, 40"watt
:.-a,.a.1
First high-compliance
piston
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First to
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First complete stereo
power
Smithsonian
fo.
its
ufactured
Avery Fisher in
til5l reverberation device, f0r
equipment*-fhe
First stereo tuner
First FM tuner with six
fiv5l FM iuner
First front
use.
tuner
graphic
Stereoph0nic
high-quality
Tuning Indicator.
speaker system.
use MicroRay for FM tuning
Indicator.
amplifier and new 7591
Institution,
collection America's first commercially
high
fidelity radio-phonograph,
1937.
Fisher Dynamic Spacexpander.
with five limiters.
panel
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1t1-17t':
limiters in an FM tuner for
quality
a high
with TWO meters.
response curve indicator for
'tuner.
FM
Radio"Phonograph
Remote Contr0l System.
Slereo
plus
FM-AM receiver
washington, D.C.
with MicroTune.
lF
antenna selector switch,
rvith Magnetic
FM-AM
Receiver
amplifier).
high-efficiency free-
and
as
with
output tubes.
high
use in
stages.
home
ampli-
(FM-
a Record-
60-watt
accepis
man'
made by
fidelity
72-300
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First
complete receivers with Multiplex.
[i1sl FM-Stereo-Multiplex
First l0udspeaker
cone, eliminating all
First internal switching system t0
ate iape
switches.
First simplified'operation
frequently used
yet
immediately accessible.
First loudspeaker with
co il.
First bass speaker
num and fiber cone
First
Tuner
FM
for
tuning
cast indicator
First
Stereophonic
Motor
Tuning.
First supersonic
fidelily componenl.
First to
use 8417
design.
power
First
quency
compensated
First
amplifier kit with STRAIABALANCE,
namic balancing system.
First multiplex adaptor
ti0n.' CIosely
j-:,t{:,.a1.}32..
tuners
with
system
parasitic
resonance.
playback
with use
controls
with
with
Kit
and
separate
(S1ERE0
FM Tuner with TUNE.o-MATIC
wireless Remote
tubes with unique cavity-an0de
amplifier to use oscilloscope-type, fre-
approaches theoretical limit
of
Control-Amplifier,
behind a front'panel cover,
eddy-current-damped
combined
seoarate
cathode ray stereo broad-
BEAM).
input
circuit.
with
'flywheel
with
STERE0
frameless
all controls and
d'Arsonval meter
Control
woofer
permit
immedi-
with in-
serrated-alumi-
in a high
visual
synchroniza'
0f noise
BEAM.
voice
dy-
THE FISHER
ALTEGRO
MODEI A.I90
Stereophonic Rsdio-Phonogroph
runcuasrNc
[fv
group
standards
ducing
equipment.
same rrorld-renowned
professional
and
broadcas, stations
equipment
walks
o{ life, including
The
Allegro
more
elaborate
set of audio'controls,
and Treble
earphones
you
allows
tracted
by
the
sound
:tyled front
quaiity
design,
for
each channel,
pentode.
Cistortion
Moderate
to the
rrrE
of
discerning
of reliability
equipment now
can aiso
possesses
Fisher units.
controls. A
is also included
to
enjoy
them. Full
system
o{
panel
are many
such as ihe
and
vanishirig
FISHER
and
The FISHER
engineering {acilities
throughout the
be {ound in the homes
many
many
including
convenient
music
Iacilities
your
using
carefully
Allegro,
mrsic lovers
performance
Allegro
used in
laboratories,
celebrities from the
of the features
incorporates
It
Vclume,
front.panel
and
a
special
without disturbing
for connecting
set are
of separate
controlled
provided.
but important,
developed,
TV
unseen,
use
a newly
point.
in their
nation
Balance
you
who
has been designed
a versatile,
speaker
use
joined
have
demand the
home
which have
government
and abroad.
of many
jack
push-pull
leaders in all
world
{ound in the
yet
and separate Bass
for
listening
silencing switch
others
or being
a tape
Behind
the
{eatures
output
beam-power,
of feedback
music repro-
of music.
recorder
a
select
highest
by the
created
agencies
Fisher
larger,
convenient
with
dis-
elegantly
of high
stages
dual
reduces
The
chang€r which
wide-range
and monophonic
The
Allegro includes
multiplex converter
Fisher tuners
ments
ever developed
tuner included in this Allegro console
the design
reputation.
A total
reproduce the
realism. Each speaker
or
specially-designed
frequencies, and a cone-type tweeter for the
treble
tones housed in
speakers recreate the
to
the highest
The characteristics of
were carefully
(The
ampiifier, for
player
record
cartridge with
aie famous
principles
of {our
entire
frequencies that ahe human
matched to
is the
inrermixes all
long-piaying
a superb Fisher
for reception
throughout the
for the
and
careful construction that
speakers
audible spectrum with an
system
low-resonance
a fully sealed enclosure.
entire audible
the individtal components
produce
example, was
world.renowned
standard size records. It
a diamond
records.
reception
(two
consists of two speakers, an eight-inch,
stylus for
of stereophonic FM
bf
for each
woofer for the bass
spectrum from below 50 cycles
ear can detect.
a totally integrated
specifically designed to complement
Garrard
FM tuner
as
-world
programs,
radio
is lully representative
'channel)
amazing degree o{
upper mid-range and
four-speed
includes a
your
stereophonic
with a built-in
prcgrams,
finest
the
have created that
of
and the
are used to
mid-range
and
Together these
your
Allegro
sound system.
instru.
of
dominate over
performance.
NORMAL
be
in the
position
relative to
speaker
position,
expected
program
toward R will increase
the lelt; turning it
volume over the right.
the
other any more than
Normally, this control will be in the center, or
aithough small variations to either side
because of dillerences in room
malerial.
Turning
it
control
the
volume
the
toward L
past
the NORLAL
increase
the original
are to
right
speaker
the
did during
acoustics or imbalance
of the
will
left
Selects
AUX:
connected
page
7.)
Automotic
'When
entire Allegro,
an
additional
to the AUX
jacks
Shut.Off
the Selector switch is
including the
componenl, such as a tape recorder,
cn the rear ol the Allegro.
turned to the PHONO
tuner,
will be
turned ofi when the
position,
(See
the
Boss ond Treble
The
Bass
heard in the sound output.
position,
at the
because of a
you
decrease the
counterclockwise,
in the
position
the
increaqed, resulting
Treble controi
more
wise,
the
program
have selected, simply
The Treble controls adjust the intensity of the Treble tone heard
sound
will result in the same degree of treble tone as exisis in
program
mellow
Conlrols
control increases
bass tones
source.
bass
deficiency
prominence
output. As with the Bass control, the NORMAL
source.
in
clockwise;
and inJimate tone,
or decreases
the Bass control in the NORMAL
With
will sound
you
If
wish to increase
in the
turn
the Bass control clockwise.
the
of
bass tones,
The relaiive amount oI
a more brilliant and crisp sound, by
and it can be decreased, resuiting in
by turning
the amount of bass tones
as they were recorded
exaclly
record, tape or radio broadcast
the
bass emphasis
turn ahe Bass
treble
the
control counterclook-
Selecior
PHONO:
and
Automatic Shut-OS
FM:
or
Selects the
stereophonic records.
position
This
stereophonic
FM
Record Changer lor
(See
{eature.)
the tuner {or
selects
programs,
playing
paragraph
the
listening to all monophonic
of all
following on the
To
control
tone can be
turning the
monophonic
THE
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FIGURE l.
Conlrol Ponel
of the Allegro
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played.
een
nattended
h Filter
The High
nnoying
ut
e used to
:ations.
qkers
'stems
Lrphones,
;ing
:commodate
'event
commend
.em
vel
ritch
eaker
dulling the
Switch
The
Speakers
of
distracted
overloading,
and that you
Lre{ore
in the
systems.
record
your
without
ctor
Turns
FF:
dication
vl
rnophonic
cessive
rtions.
eakers.
tl
that
MONO:
noise
The
STEREO:
automatically
This
special
playing
when
Filter
is a
scratch, hiss
portion
treble
ehminate noise
and Ecrphones
switch
Allegro,
disturbing
by
external noises.
any
standard
and
you
that
connecting
ofi the tuner
FM programs.
position
ON
power
position
fhis
on
multiplex
monophonic
Use this
do not
turn
the
is
stili applied
position
shuts ofi after
permits
feature
records.
sharp
cut-ofi
and
of
on multiplex programs
circuit
other
high
the musical p.ogrurrr.
Jock
is
designed
so that
others
stereo
possible
leave
the
earphones.
for
you
damage
them
Volume
normal
to
silence
can
listen
in the
The
earphones
plugged
control
Be
sure to
listening
TUNER
only. The
dial lights
to the
amplifier.
should
be
It
stereo
signal
used {or
can
also
programs
yrill
be
to
listen to multiplex programs
the
you
same
be used
last
to
leave the
designed
frequency noise
from very
the two
program
to a
.oo*,
Earphones
plug.
to
the
earphones,
in
when not
to
a
relatively
leave the
through
ryill renrairr
reception
to eliminate
from
heard through
record
to
It may
*rr,l
jack
In
order
Speakers
ON
very
Allegro
remove
with-
also
weak
speaker
with
without
will
using
loi
tle
two
as
of all
weak
both
has
to
1ye
an
in
{ull
stereo
{or
monophonic
FM
SIEREO FILIER: Use
program
program
the
try
the
High
resuit
in
to
the
FM
program.
during
multiplex
position
increase
Tuning
The
TUNING
station.
A logging
your
{avorite
TUNING
tuning
indicator.
two
bars of
point
tuning
STEREO
multiplex
changes
indicator
turned
a- record.
closed
rnounting
record-changer
cerning the
on the
SCAN:
to a rnonophonic
to the
Disengage
position,
turntable.
sound. Return rhe
programs.
when background
being broadcast.
Filter on the Amplifier
a significant
MONO
The FM STEREO
during monophonic
in the level
knob is
scale
station.
INDICATOR:
Slowly
light
gives
that
When
program,
stereo
is lighted
FM
STEREO
RECORD
the
arm from
Before
swinging the
tre
post.
Records
compartment
operation
this
reduction in
position
stereo broadcasts.
o{ background
(0
When
rotate
are
closest
the clearest,
you
the
SELECTOR
CHANGER
the holding
sure to
should
your
of
Selector
position
hiss from
for monophonic
FILTER
used
to 100)
a station
together.
tune
this
program
position.
If the
noise
Conrrol Panel.
the noise
programs
noise.
ro
select
is
inciuded ro
the
knob to
noise-free,
to
a station
indicator
the
switch on
a weak
OPERATION
record changer
press
the tone
je{t
not be
is
closed, For
record
changer,
to the
FM
{or listening to
staiion interferes
not
is
reduced
level, turn
reception of
position
Leaving
is
This is
light
clip
should be
the
will cause
rhe tlesired
make
Lreilg
tuned
position
the
the center-of-channel
reception.
that is
go
will
on.
go
will
rhe tuner
before
attempting
compartment
arm down
on
the turltable
detailed inlormation
read
position
MONO
a
stereophonic
with
sufficiently,
I{ this
does not
the
Selector
the
stereo
used
Selector
an unnecessary
F]Vl-Broadcasr
it
in,
trroadcastins
If the
ofi.
firmly on the
the
only
in this
easy to find
the
watch
where the
statlon
When the
should
play
to
up, to its
the
when
con.
instructions
a
be
two
The
placed
up to
ih" ,p"uk".
mod"iute
Two l0'foot
apart.
On"
"rrd.
bottom
the
on
should
cable
Allegro.
and"one
or close
against
pirspe"tiu",
*r"u.
ing
"*igg*.ut"d
stereophonic
of the
speaker
feet
l0
directly
door
amount
of
end
hinge
connected
be
Two such
the right
for
to a
two speakers
the
Placing
channel
systems
from
upward.
upward
oI
cables
this cable
the speaker
oI
jacks
speaker'
wall
too Iar
them
separation
sound
SPEAKERS
your
of
the
are
to
are
pattern.
Allegro
main cabinet.
pressure; do not
provided with
should
the SPEAKER
provided,
ior
should
and will
hinges
The
be
cabinet;
The
results'
best
be equidistant
wili
apart
can be
this, simply
To do
separate
try
phono
inserted
one {or
speakers
cause
in
other
the
jack
on
the leit
should
the best
For
{rom
in an
result
a "ho1e'in-the'middle"
detached
with
{orce
to
jacks
on
receptacle
the
end
the rear
be
the listen'
unnatural'
and
lift
only a
them
each
the
of
the
of
speaker
placed
stereo
FTGURE
2.Tube
toyou! of
the
RIGHT
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at
an
through
the
outputs
from
of
AIjX.
ADDINS
Recorder
recorders
thi
the
afiecting
t\e
input
should
playback
a
tbe
two tape
rear of
of
ali
to make
broadcast.
Allegro,
jacks
through
on
PHONO
FM radio
A"UX
a ioudspeaker.
AUXITIARY
can
Allegro.
the
the recording-
be
head
To make
Ailegro.
recording
play
To
the
the rear
the
back
inputs
on
The
oI the
type
?
recorder
the
conlrols
tape
a
connect
on
preamplifier outputs
or
play
To
connected
be
I
COMPONENTS
lrom
record
to
a recording
to
While
the control
Selector
of a
a
back
outputs
Allegro'
and-
iniended
your
tape,
.1
.
's,3
from
RCRDR
two
lhe
making
ol
a recording,
panel
o{
should
switch
FM
or
record,
previously recorded
your tape
not
These
the direct
direct
{or
turn
tape recorder
the
to
and
Allegro'
the
Allegro
the
to record
recorde.r
connection
Selector
play
output
you
set
be
tape
output
l5r
r-
to
to
FIGURE
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lhe
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AMP-----:-:I
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osc
Tube
3.
ter
An external tuner
'ear
of ihe Allegro. A
;hould be connected to both
rvailable from
can be connected
your
dealer or
monophonic
jacks
AUX
any electronics
Sound
Because
Ldvisable to consult
he
lowever,
he cable from
hrough a "Y"
-l
WS-l Speakers may
.re not
,EFT
lhe
re
he rear of the
ernsl
The
.nd
Juirements
t necessary to
eception of stereo
rom
n such a stereo fringe area,
he addition o{ an
To connect an external antenna to the
installed,
;
television
sound output
once lhe method
receivers
your
your
of
the TV
connector, available from
difier widely in
serviceman be{ore
TV set to the
of connection
should be
set
Speokers
detached. The
and RICHT
speaker to the
connected to the LEFT SPEAKER
WS-l speakers lor
be added
WS"1 speakers should
SPEAKER
le{t as
Aniennq
antenna
built-in
should
o{
the same
provide
the multiplex
station
remove
an outdoor
use
external
the back
of
good
programs
are received
to
the Allegro
jacks
viewed
best
your
All.egro
reception in mosi areas.
stereo system, however, sometimes
directional
even though monophonic
perfectly.
consult
antenna.
panel.
Irom
results.
In
to
the AUX
tuner
with a
through
sound
connected to
your
on the rear o{ the
the listening area
jack.
is
of
your
Allegro once the
the upper
a "Y"
supply store,
circuit design,
attempting io
system oI the Allegro.
has been determined,
the AUX
dealer.
if the main
be
connected to the
Ciip the
the {olded
The extra re-
yagi
antenna
you
If
Fisher Dealer
happen to live
lelt corner o{ the
jacks
on
single
output,
connecror,
connect
jacks
speakers
cabinet.
shouid
wire loops
dipole type
make
proper
lor
programs
concerning
antenna
the
it is
on
tuner
chassis
OHMS.
connect
make
edge
parts
Disconnect the two
the external antenna
sure
of the back cover.
of lhe
Replocing
AMPLIFIER:
rear
cover of the
which
disconnects
panel
rear
through
slightly
When
power
excessive
TUNFR:
replaced
mounted
These
before the
metal
careful
assembly.
removed
Replace rvith
the
into
the
and turning
replacing the
interlock before pressing
pressure.
The
from the rear
in two bracket
bracket
strips
not to
by
two
sections of the
placc.
Replccing
The
stylus assembly
diamond
stylus for all long-playing
you
will
find two
that
the antenna
porver
Then
interlock
SERYICE
fhe Dial
The
removed, the
amplifier
buib can
and
Once the assembly
pressing
a No.
Do nol
fhe Phono
Lcmps
power
red
Allegra.
power
the
compartment,
counterclockwise.
rear
lamps which
assemblies
pull
by
be
removed. To
pull gently
too
hard on the
inward
1847
bulb.
power
usc excessive
Stylus
included
This cover
power
cover,
removing the
assemblies,
must
screw ierminals
leads from
leads.
wire is threaded
carefully fit together
press
and
the
When replacing
the back
NOTES
cnd Power
lamp
can be
replaced by
provided
when the
illuminate
slightiy
When replacing
is
cover is
lamp
can be removed
pressing
Replace with a
position
the
cover
the tuner
one
be detached
do this,
toward the
wires connected
has been
and turning
interlock
prcssure.
Assenbly
your
with
records,
the two
into
rear cover. The
on
rear
detached,
before
Record
marked FM ANT
built-in antenna
the back
through the
the two
cover into
Lighl
removing the
with
an interlock
detached.
the bulb
each eld
lrom
press
the tear cover,
both stereo
by
into its
No. lB4?
sections of the
place,
Do
dial
can also
of
the
front
together
of the
cabinet. Be
to the
rhe
bulb can be
counterclockwise,
pressing
Changer uses
and
300
and
cover
slot at the
mating
place.
rhe
With
reaching
socket
bulb.
not use
be
bulbs
are
the
dial.
panel
the two
bracket
position
the
cover
mono-
a
phonic,
as
for
itylus
diamontl
hours
of the
and
the
carrridge
TUNER
lever
stylus
more of service
or
styius
record sur{aces
replacement
When
tone
shell.
be{orehand.)
with
position and
assembly
stylus
will
assembly
rpm records.
45
as all
well
playing any ?B rpm
extremeiy
is
resistant
before
will
{ree of
dust.
prolonged
greatly
be
is necessary,
arm
by turning
(If
the knurled
the set
To remove
and "LP"
"78"
the
pull
puil
(Fisher
firmly
free
outward
when
Part
shellac
to
replacement
by keeping
lemove
tuln
is on,
the stylus
markings
on
from
su$cient
pressure is applied'
No. G3501)
It also includes
you
records
'wear,
may
and should
is necessary.
the stylus
the cartridge
directly
ring
the Selector
assembly'
it' rotate
it
the carrridge.
be
easily
can
a sapphire
The
own'
give
1000
The life
assenbly
{rom
shell
the
behind
AUX or
to
grasp
the
to the midway
The entire
new
The
pressed
into
place
in
the metal
of the clear
Your Serviee
At
is our desire
It
faction.
may arise.
that
yourself
concerning
Fisher
Your
Be sure
indicated.
the same
the
rod at
plastic
We solicit
After
your
with
it is meeling
how
Deoler
to
consult
He stands
posi:ion
end
holder.
yort
that
your
you
FISHSR,
your
ready
occupied
the assembly
of
operates to
Allegro
correspondence
had an opportunity
have
we would
your
requirements.
FISHER dealer
to assist
by the
rests within
on any
appreciate
promptly
you
at any
old one.
your
special
hearing {rom
time.
sure
that
prongs
satis-
Be
the two
complete
problems
to familiarize
i{ any de{ect
you
is
AMPLIFITR
Power
lvlusic
chonnelsl
Amplilier
Eniire
oulput)
Chonnel
Sensitivily
02
-r
Response
syslem
Distortion
(dt
(ollernole
Frequency
Hormonit
lnfermodulolion
Stereo
Sensitivily
TUNER
Usoble
Selectivity
Nr 23r
(lHF
Stondord,
only
{including
{dl
Distorfion
Seporolion
inputsl
AUX
{IHFM
chcnnell
SECAUSE ITS PRODUCTS
bofh
speokers}
roied oulPut}
(qf
rofed
I kc}
{ot
Stondsrdl
TECHNICAL
20 watts
*3 db
35-72,000
Uni{orm
range as
Less than
Less than 1.0/o
More than 50
230 millivolts
2.5
JZ AD
ARE
D€SIGN Oq
cps
thoughout
an integrated
1.0/o
microvolts
SUBJECT:O CONTINUOUS
SPEC:FICATION
audible
system
db
IIIPROVEMENT,
WITHOUT NOIICE AND
SPECIFICATIONS
Colibrotion
Audio
de-emphosis)
Slereo
SPEAKER
Speoker
Woofer
Twee*er
Woofer tlux denrily
Crossover frequency
OVER.ATL
Power
volts,
luner ond record chongerl
Dimensions
FISHER
WITHOUT
Accurocy
Frequency Response
Chonnel Seporction
SYSTEMS
Complemenf {eoch
Consumplion
5O-60
RADIO
CORPORATIOTI
INCURRING ANY OBLIGATION.
(ai
cycles, including
{speoker
(L-C
doors closed}
RESERVES
(ofter
{st
chonnel}
nefwork)
105-I2O
I kcl
THE
RI€HT
TO IIODIFY AI{Y
0.2%
35*15,000
More
B-inch diameter
2t/2-ineh
10,000
2500 cps
100
B\l/t"w,
cps
than
diameter
gauss
watts
l7r/2"h, 13"d
30 db
-r
I db
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