Quadraflex 650FET R User manual

Referenco:
Owner's
Manual
Referehce:osoFET
R
byQuadraflex
AMIFM
StereoReceiver
TheSoundAnswer.

Referehce:65oFET
R
by
Quadraflex
AM
/ FM
StereoReceiver
Cong
ratu
lations!
Your
newReference:byQuadraflex
650FETR
isthefirststereo
receiverto utilizespecial
MOSFET
power
transistors.
These
advanced
devices
reduce
highfrequencydistortion
toa fraction
ofthatfound
in
conventional
receivers.Theabsenceofdistortion
at
frequenciesfarbeyond
therangeof hearing assures
a purity
andclarity
ofsoundthat
isunprecedented.
lntroduction
YournewReference:650FETR
has
beenengineered
by
Quadraflex
to provideyears
ofsatisfaction.
Proper
installation,
connectionand
useof its controls
areessential
foryou totake
full
advantage
ofits
quality
and
versatility.Thismanual
is
organized
for
your
rapidunderstandingand
enjoymentofyour
Reference:650FETR.
U
n
packi
ng
Carefully
removethe
Reference:650FETR
from
its
carton.
Avoid
liftingbytheAM antenna
mountedonthe
rear.ltcannot
support
the
weight
ofthe
receiver.Saveallstyrofoam
packing;
it
is
essential
for
secure
shippingormoving.
Thereisalsoa small
plastic
bagcontaining
a light colored
wire.
ThisistheFM
antenna
sodon'tthrow
itaway. Lookontherear
panel
ofthe
650FETR
and
locatetheserial
number.
Makesureitismarked
on
your
dated
purchase
receipt.Save
thistovalidateownership
if
your
Reference:650FETR
ever
requiresserviceorisstolen.
Placement
Place
your
650FETR
ona sturdy
tableorshelf,
leavingenough
spaceto get atitsrear
panel
connections.
Youmust allow
several
inchesfor
ventilation
and
avoid
putting
itona rugthat
mightimpedeaircirculating
intoventopeningsonthebottom.
Keepthe650FETR
away
fromdirectsunlight
orothersources
of
excessive
heat.Avoid
placing
itwhere
itmight
be
exposedto
rainormoisture.
Beforemakingconnections.
makesurethe65OFE1R
isnot
yet
plugged
intothe
wall.This
mustwaituntilallconnections
are
made.

SpeakerConnections
For
the
best
performance
we recommendtheuseof 1B-gauge
"lamp"
or"zip"cord.Use
ofthinner
wirewillimpair
power
transfer
toyour speakers.
Preparethespeaker
wire
bycutting
twoapproximately
equallengthsand
runningthemwherethey
aresafe.
At each endseparate
the
paired
wireforseveral
inches
andstripaboul1/t
to % inch ofinsulationateachend.
Youcan
dothisbyslightly
cuttingthe
insulationwitha knifeor razor,
being
carefulnottocut
intothewire
strands.
Then
pull
offthe
unwanted
insulation.Twisttheexposedstrands
tightly.
You
should
nowexaminethe
wireclosely.Onesideofthe
pair
will
either
havea ridge onitsinsulationor a differentcolor
wireif
theinsulation
istransparent.When
you
connect
your
speakers
makesure
thewirewiththe
ridgeorcoppercolor
goes
tothe
positive
terminal,usually
marked
+, 8 ohm,orpositive,
and
the
other
wiretothe
negative
terminal
usuallymarked
- ,0,or
negative.Makesureeachspeaker
is wired
the same
way.
Locatethebottom
rowofspeakerterminals
markedA. The two
left-handterminalsare
forthewires
going
tothe
speakeronyout'
right
(asyour
facethefrontofthereceiver).
Thetworight-hand
terminalsare
forthespeakeron
your
left
(facing
the
receiver).
Connect
each,
remembering
to insertthecoded
wireintothe +
terminal
markedinredon
your
650FETR.
Tomakeconnection,
push
onthetabbeloweach
terminal,insertthe
wireinto
the
exposed
hole
and
releasethetab.Atthis
point
inspect
your
connections
to makesurethatthereare
nostrandstouching
between
wires
orterminals
eitherat
your
receiver
orspeakers.
Youmayconnecta second
pair
ofspeakerstotheupper
row
ofterminals
markedB.Usethesame
procedures.
Your
Reference:650FETRcansafelyoperate
twopair ofspeakers
whoseimpedance
is
8 ohmsorhigher.
lf
either
pair
ofspeakers
israted
below
8 ohms,thenonly
one
pair
maybeoperatedata
timetoavoidoverloading
theamplifiersection.
Caution:
Nevermakeany speakerconnectionsthat
join two
redspeaker
terminalson your 650FETR.
Thiswillcauseserious
damage
and willnot increase
poweroutput.
lf youconnectonly
one
speaker,use
eithertheL or R terminal,butnotboth.
Turntable
Connection
Makecertain
your
turntable
isequipped
with
a high
quality
magneticcartridge.
Thetwoaudiocables
attachedtothe
turntable
will
have
different
color
plugs
toidentifyLand
R
channels.
Pushthe
rightchannel
plug
firmlyintothebottom
jack
(R)
onthe650FETR
markedPhono7and
theleftchannel
plug
intothetopjack
(L).
Makesure
theyare
pressed
as
faras
theycan
go.
Slighttwisting
ofthe
plug
as
itisbeing
inserted
maybe
requiredifit
isverytight.
Manyturntables
also
havea separate
wirethatisforground-
ingitto the
receiver.Loosenthe
metalnut
marked
Gndon
the
650FETR,
slip
theendofthe
ground
wire
under
it,
and
retighten
thenut.
A second turntablecan
beconnected
tothePhono2 jacks
and
ground
using
thesame
procedure.
The
power
cord
from
theturntable
canbe
plugged
directlyinto
thewallorintotheoutletattherearofthe650FETR
markedUn-
switched.
Thisoutlet
is
"live"
wheneverthe650FETR
is
plugged
intothe
wall.

AntennaConnections
Properanienna
placement
isessentialfor
good
FMreception.
Inmost
areas
the
T-shaped
"folded
dipole"
wiresupplied
with
your
650FETR
isadequate. lnsertthetwobareends
intothe
Antennaterminals
with
the
redtabsmarked
300 ohms.
Stretch
outthetopsectionof
the
"T";you
mayfindthat
you
willhaveto
repositionitlaterforoptimum
reception.In
difficult
reception
areas
itmaybenecessary
to utilizeanoutdoorantenna
instead.
Your650FETRcanoften
"share"
with
a TVantennabyusingan
inexpensive
antenna
splitteror2 set-coupler,available
from
your
dealer.
Connections
madefromflatwirearemadeatthe
red
terminals.Soare
connections
madefromtheflatwirecoming
out
ofa matching transformer
ifyour
antenna
usesrounded
coaxial-type
cable.
Youmaymakedirectcoaxialcableconnections
byseparating
theinnerwire
fromits
surrounding
braidedshieldwire.The
stripped
innerwire
attaches
totheright
handredterminal;the
outerbraid
is
twisted
firmly
and
insertedintheadjacentblack
terminalmarkedGnd.
A ferritebar
AMantenna isattached totherearofyour
Reference:650FETR.Foradequate
reception
you
mustswing
it
away
fromthe
chassis,
clearofwiresandcords.
ltmayrequire
repositioningdependingonthedirectiona stationisbroadcasting
from.
Better
reception
ofdistantAMstations
ispossible ifyou
connectasingle
longwiretotheAMantennaterminal.
Thiswire
should
be20to50
feetinlength
and
runmostlyhorizontally.
Connecting
A
TapeDeck
TheReference:650FETR
hastwoseparatetape
monitor
circuits.
Youmayconnecttwotapedecks,orone
tapedeckto
eithercircuit.
Thelinelnputsto your tapedeck
plug
intoeither
setof lape
out
jacks
onthe
650FETR.Theoutput
jacks
onthe
tapedeckconnect
tothetapern
jacks
onthe650FETR.
Make
certain
thatL and
B connectionsare consistent
forTape
Outand
Tape
lnsochannels arenot
reversedfromrecordingto
playback.
A thirdtapedeck
maybeusedforplayback onlyby
connecting
its
output
to thefape 3 jacks onthe650FETR.
You
may
plugyour
tapedeck's
power
cordeither
directly
into
the
wall
or
intotheSwifched
AC
outleton
vour
Reference:650FETR
Connecting
OtherComponents
f he Tapelnor Tape 3 jacks
maybeused
with
sourcesother
thanatapedeckas
long
as
they
have
similarsignal
levels.The
audiooutputofa televisionorshort
wavetunerare
just
two
possibilities.
You
should
consult
your
dealer
if
you
are
considering
connectingsuchequipment.
Connection
Summary
Atthis
point
double-checkall
your
connectionstomakesure
all
plugs
are
inserted
firmlyandspeaker
wiresdonot
have
any
it
I

touchingstrandsateitherend.Make surethe
power
switchisin
its
off
position
and
plug
theReference:650FETR
into
a nearby
wall
outletorextensioncord.
Whenever
you
move
thereceiverorchange
connections
on
theback
panel
make
certain
the
power
isswitchedofl.
OperatingtheReference:650FETR
Thefront
panel
controlsofyour
Reference
receiver
provide
tremendousflexibilitywhen
usedtogether.
Please
readthis
sectionsothat
you
willunderstandhowto bestusethem.Before
starting,turnthevolume
controlcounterclockwisetoitsminimum
oosition.
ToReceive
FMBroadcasts
1.
Setthefarleft
selectorknob
to theFMoosition.
2.Set theTape
Mon
switchto Source
andtheMode
switchto
Sfereo.
3.SetBass,Treble,
Presence,
andBalance
knobs
attheir
center
(12
o'clock)settings.
4.Push
the
SpeakerA button.
5.Release theLoudness
andFMMufe
buttons.
6.Release
theHlFll/er
button.
Now
push
the
power
button
andslowly
advance
theVolume
knob.Tune
tothe
desiredstation
untiltheTuning
meterisinits
center
position.
A quick
check
ofthe stations
youlike
may
indicate
theneedto reposition
theFM
antenna.
TheSignalStrengthmeter
canbe usedtp checkthe
effectiveness
ofantenna
position.
ltsneedle
shouldread
steadily
as
far
totheright
aspossible. Withinsufficient
signal
strength
readings
you
willnot
be
ableto receive
clearbroadcasts.
When
you
reach
a station
broadcastingin
stereothered
stereo
indicator
atthe
right
side
ofthedialscale
willilluminate.
Push
theFMMute
switch
to reduce
noise
and
"hiss"between
stations.The
muting
circuitblocks
allsignalsbelow
acertain
strength,including
weak
stations.Release
theFMMute
buttonto
receive
thesebroadcasts.
The
Reference:650FETR
incorporates
a soecialMPXBlend
position
onits Mode
switch.Thiseffectively
reduces
background
noiseonmany
broadcastswithout
inhibiting
highfrequency
response.
ltworks
byalteringthe
separation
characteristics
of
thestereomultiplex
circuit,reducing
its
vulnerability
tonoise.
lfthesignalisstilltoonoisyitmay
benecessary
tosetthe
Mode
switchto theMono
position
where
the
650FETRisleast
susceptibleto noise.Further
experimentation
with
antenna
position
may
alsoberequired
to receive
certain
stations.
ToReceive
AMBroadcasts
The
procedure
is
similarwith
several
significantexceptions.
Settheselectorknob
to theAM position.
Tune
stations
sothat
theTuning
meterdeflects
to its highestrather
than
center
position.
Thereisno
mutingforAM.

PhonoOperation
Settheselector
toPhono
1or Phono2 dependingonwhich
one
youhave
attached
your
turntable
to.Makesure
your
turntable
islocated
far
enoughaway
from
your
speakers
to
prevent
feedback.
TapeDeckOperation-
Playback
TheTape
Mon
switch
normallycontrolsselection
ofplayback
for
twodecks.
lfyour deck
isa three-headdesign
(usually
open-
reel),thefape position
allows
you
to hearthetapedeck'soutput
whetheritisinits
recordorplayback
mode.
Switching
thefape
Monlever to its fape 1or Tape2 position
overrides
theselector
switch
forthesound
you
will
hear.lf no
tape
deckisattached to
eithertheTape1or Tape
2 position, nosound
will
beheard.
Tape
DeckOperation-Recording
Set
theselector
forthesource
you
wishto record.Adjust
recordingcontrolson
your
tapedeckaccording
tothe
manufacturer's
instructions.
Therecordingwill
not
beaffected
by
the650FETR's
settingsoI Volume,
Balance,Loudness,
HiFilter
orany
ofthe
tonecontrols.
Youcan
quickly
check
tosee
thatthedeck
isreceiving
the
proper
signal
byswitching
thefape Mon
lever
to itsappropriate
fape position.
Copying
Tapes
Copying
tapesrequirestwotape
decks.Your
Reference:650FETR
isequipped withspecial
Dubbingcircuits
whichallow
deckstocopy
fromeither
one
totheother
independentoftheselectorswitch.
Thismeansthat
youcan
listentoanysource
whilethedecksarecopying.
This
is
doneby
setting
IheDubbing
switch
in
the
1
>2 position
ifyou wish
to
play
atapeon
Deck
1 andcopy it
on
Deck2.Usethe
2>'l
position
to reversethe
procedure.
Tolistento eitherdeckatany
timeusethefape Monswitch.
Thus
youhavethechoiceof
listeningtothedeck
playing,
thedeck
recording,oranentirely
separate
source
withoutinterferingwiththe
recording.
AdjustingTone
The
Reference:650FETRreceiver
has
controls
to
adjust
bass,
treble,and
/oudnesscompensation.
Thebassandtreblecontrols
have
noaffecton
thesoundintheircenter
(12
o'clock)
position.
Thesecontrolsshouldbeset
totaste.Therearedetentsateach
2 dBincrementforeasilyrepeatablesettings.
Avoidturningthe
bass
all
thewayupat
highvolume.Thismaydistortthesound
anddamage
your
loudspeakers.
TheReference:650FETR
has
anadditional
Presencecontrolto
boostorcutcritical
midrangefrequencies.
ltis
especially
useful
toisolate asolo
voice,
piano,guitar,
etc.and
makeitmore
or

less
prominent.
ltalso helps
adjusttodeficienciesinyour
loudspeakers
or listening environment.
Furtherflexibility
isprovided
bytheTurnover
buttons.These
alterthefrequencies
which
the
bassand
treble
controls
affect.
The
outer
position
ofeach
selects
control
overfreouencies
closertothe
midrangewhere
your
ears
aremore
sensitive;
making
theeffects
ofthe
bass
andtreble
controlsmore
noticeable.
The
inner
position
selectsmore
extreme
freouencies
where
your
earsareless
sensitive
andthe
effectismore
subtle.
TheLoudness
button
activates
a circuitthat
slightly
boosts
extreme
bass
andtreblefrequencies.
Because
your
ears
are
less
sensitivetothese
extremes
atlowvolumes,
this
circuit
compensates
sothat
youhear
allthemusic.Avoid
excessive
basscontrol
boostwhen
theLoudness
buttonisoushed.
TheHi Filterreduces
thehighfrequency
content
ofthesound.
Itwill
reduce
"hiss"
in
tapes
andbroadcasts.
Useonly
as
needed.
The
Balance
control
adjustsrelative
volurhe
between
theRight
and
Leftchannels.
Use
itifyou
sitcloserto onespeaker
than
the
othersothat
thesound
sourceis
"centered't.
H
ead
phones
Thisistheoutput
forstereoheadphones.
Plug
inyour
headphones
forprivate
listening;
you
canelectto have
speakers
onalso ifyou
wish.However,
unplugheadphones
when
you
aren'tusingthem;high
power
surgescould
damage
them.
OverloadIndicator
TheReference:650FETR
has
a smallred
LEDlocated
next
lo
the
power
button.lt lights
to indicate
a short-circuit
oroverload
condition
andthesound
shuts
off.This
protects
criticalcircuit
components
from
damage.lftheLEDlights,
turn
offthe
power
and
checkall
your
speaker
connections.
Normal
operation
may
beresumed
bywaiting
15seconds
before.turning
power
onagain.
Power
Meters
TheReference:650FETR
has
twounique
9-positionLED
power
indicators.
They
enable
you
to relate
the
power
function
ofthe
amplifier
sections
lo your
desiredlistening
level.
Thelast
section
oftheseindicators
marked
Clipping
willflash
when
theamplifier
approachesitsmaximum
undistorted
capacity.lfthelast
LED's
staylit
you
areoperating
atorbeyondthetimits
ofthe650FETR.
This
couldcause
sustained
speaker
damage
from
overload.

Tuning
Dial Loudness Switch Hi-Filter
Switch Power
Switch
AM/FM
Signal
Strength
Meter
FM
Center
Tuning
Meter
Tone
Turnover
Selector
Switches
Tone
Controls
LED
Power
lndicator
I
Tuning
Knob
FN/ Source
Station Muting
Indicator
Indicator Switch Lights
FM
Stereo
lndicator
Speaker Overload
Selectors Indicator
(Do
not
use
as
handle.)
earjnce
I u",rtr.l rulopnon"
Control
I Control
Il Output
rl
Main/Remote I
I
Source
Selector
AC
Power
Cord
I
Tr na
Dubbing
Switch
I
Mode
Switch
Monitor
Switch
ll
I Presence
I Control
Presence
Turnover
Selector
Switch
Unswitched
AC
Outlet
Femote
Speaker
Outputs
I
Main
Speaker
Outputs
Inputs
Deck
2In
pu
ts
Deck
1
Phono
2 Phono AM
Inputs Ground Antenna
ll
I Swrtched
Fuse Outlet
Tape Tape Tape | |
Outputs Outputs Inputs Phono
1 Antenna
Deck2 Deck1 Deck3 Inputs Terminals

Block
Diagram
Speaker A
Reminder
Get
into
the
habit
ofturning
downthevolumecontrol
onyour
Reference:650FETR
when
you
turn
your
systemonoroff. This
eliminatesthe
possibility
ofinadvertently
damaging
your
speakersifthe
power
is
switchedonwiththevolume
control
advanced.
Troubleshooting
Usually
problems
that
occurare
not
thefaultofyour
Referencereceiver
andareeasily
cured.
lfyou
cannotsolve
a
problem
in
themannerdescribed
below,consult
your
Reference
dealer.
Nosoundandthereceiver
does
notlight
up.
Make
surethe
Reference:650FETR
isplugged
into
a working
ACoutlet
orextensioncord.ChecktheAC linefuse
attheback
ofthe
receiver.
lfthefuseisblown,replaceitonly
with
thesame
type.
A largerfuse
willcreateinternal
damagetothe
circuit.lf
thenewfuse
blowsagain,consult
your
dealer.
Thereceiver
lightsbutproduces
nosound.
Makesurethe fape Mon
leverisin
theSource
position.
Speakersswitchedon.lt Overloadlightison,switch
power
off,
checkallconnections
and
wait15seconds_before
turningon.
Makesurethereisadequateventilation
toprevent overheating.lf
light
comesonagain,
youmayhave
a shortedspeaker
or
section
ofspeakerwire.
Nosound from
onechannel.
Recheck
connections
andBalancecontrol.lfthisoccurs
only
withPhono
ora tapedeck,switch
theL andR inputleads.lf the
soundthencomesoutof theotherchannel,
youcanbecertain
the
problem
iswith
thesourceor its
cableand
not
your
receiver.
Poorbassresponse.
Checkspeaker
phasing
byswitchingto mono
and
backto
stereo.
lfthebassisweakerinmono,turn
offthe
power
and
reverse
the + and - wirestor
onesoeaker
onlv.
ilum sound.
Makesure
audiocable
plugs
are
inserted
firmly
and
that
the
phonoground
wireisattachedto thereceiver.
Occasionally
removing
the
ground
wirewill
eliminatedhum.
Movereceiver
away
fromTVsetorfluorescentlight.
Poorreception
Almost
always
thefault
oftheantenna.
Denseurban
and
hilly
areas
present
a greater
challenge
from
multipath
orreflected
signals
like
thosewhichcause
"ghosts"
withTVreception.
Your
dealercan
provide
assistance.
Cleaning.
Usea slightlydampcloth.Avoid
useofany
cleanersor
solvents;theymight
scratchthe
panel
orcloudthe
dial
window.

Reference:650FETR
PerformanceData
AmplifierSection:
PowerOutput:65wattscontinuous
powerper
channel
minimum
RMS,
bothchannelsdriven
into8 ohms
withnomorethan0.1% total
harmonicdistortion.
(1
8.13
dBw)
Frequency
Responseat 1 watt:5-65,000
Hz t .5dB
TotalHarmonic
Distortionat1 watt:.01%
lMDistortional 1 watt:.02%
Crosstalk
at1 kHz:- 60 dB
Output
Type:MOSFET
PreamplifierSection:
Signal-toNoise
Ratio:Phono
1,2 80dB;
TapeMon1,2 85dB;
Tape
3 85dB
lnput
Sensitivity:
Phono1
,2 2.0mV;Tape
Mon 1
,2 160mV;
Tape3 160 mV
PhonoOverload:200mV
RIAAEqualization:
t .25 dB
ToneControl
Range:Bass
t 10dBat 50Hz
with150Hzturnover
t 10 dBat
100Hzwith300
Hzturnover
Treblet 10dBat20kHz
with6 kHzturnover
t 10 dBat10kHzwith3 kHzturnover
Presencet 6 dB at 800Hzor 'l
.5'kHzturnover
Loudness
Contour
(at
-30 dB):
+8 dBat
100Hz;
+6 dBat20
kHz
.High
Filter:
- 3 dBat
10kHz
FMSection:
IHFSensitivity:
for30dBquieting:
mono1.79V
(9.8
dB0;stereo
a.2pV
(17.7
dBf)
for50dBquieting:
mono2.69V
(1
3.5
dBf);stereo34gV (35.9
dBf)
Channel
Seoarationat 1 kHz:without
MPXBlend44 dB;
withMPXBlend24
dB .
THD:
mono.1
o/o;
stereo.15%
Signal-to-Noise
Ratio:72dB
Capture
Ratio:
1 dB
AlternateChannelSelectivity:
72dB
lFResponseRatio:95 dB
lmage
RejectionRatio:60dB
MutingThreshold:8
gV (23.3
dBf)
AM Section:
IHFSensitivity:
200
gvlm
THD:.50/o
Signal-to'Noise
Ratio:50dB
lmageRejectionRatio:50dB
Reference:by
Quadraflex
LimitedWarranty
YourBeference:byQuadraflex
receiveriscoveredby a limited
warrantyagainstdefects
in materials
and
workmanshipfora period
oftwo
years
from
thedateof purchase.
Referencewarrantyrepairwillbe
performed
only
when
yourpurchase
receiptisshown
asproof
of
ownership.Defective
parts
willbe repaired
or replacedwithout charge
if
thisReferencereceiveris returnedto your dealer'sstore,asshownon
yourpurchase
receipt,
or to anybranchof that store
where,inallcases,
authorizedservicewillbeavailable.Checkthe
yellowpages
orwhite
pages
of your
telephonedirectoryforthelocationnearest
you.
lf
additionalassistance
isreouired.
olease
write
to Reference attheaddress
provided
belowdescribingthemalfunction.Referencewillsenddirections
inwriting.
Charges
forunauthorizedserviceandtransportationcostsare not
reimbursableunderthis
warranty.Anydamageordefect resultingtrom
unauthorized
parts
or servicesisnotcoveredbythiswananty.Any
services
performed
by otherthanadealerauthorizedto perform such
servicesarenotreimbursableunderthiswarranty.
Thiswarranty
becomes
voidiftheserial numberisdefacedor removed,
ortheproduct
has
beendamagedby alteration,misuse,accidentor
neglect.THEWARRANTOFASSUMESNOLIABILITYFORPROPERTY
DAMAGEORANY ATHER
INCIDENTAL
ORCONSEOUENTIAL
DAMAGE
WHATSOEVER
WHICHMAY RESUTTFROMTHEFAILURE
OFTHIS
PRODUCT.Any andallwarrantiesotMERCHANTABILITYandot
F/INESSimpliedby law are
limited
tothedurationofthisexpressed
limitedwarranty.
Somestates
do not
allow
limitations
onhowlong animpliedwarranty
lasts,
sotheabove
limitationsmaynot
applyto you. Somestatesdo not
allowtheexclusiorior limitation of incidentalorconsequentialdamages,
sotheabove limitation
or exclusionmaynot apply
to you.
Thiswarranty
givesyouspecific
legalrights
and
youmay
also
have
other
rightswhichvaryfrom
stateto state.
Service
Manager
Reference:by Quadraflex
CBS
Inc.
130165thStreet
Emeryville,California94608
Referehce:
by
Quadraflex
CBS
Inc.
1301
65thStreet
Emeryville,California94608
PrintedinUSA
,.-
1978