McIntosh MC-30 Manuel utilisateur

INSTRUCTIONMANUAL

McINTOSHMODELMC-30

30WATTPOWERAMPLIFIER

TypeA-116B

Serial#9E341andabove

038-243

MCINTOSHLABORATORY,INC

DESCRIPTION

TheMcIntoshModelMC-30isa 30watthighfidelitypoweramplifierdesignedforhomeen-

tertainmentsystemsandprofessionalapplications.TheModelMC-30issimilartotheearlier

McIntoshModelA-11630wattamplifiersandincludesalloftherigidelectricalspecifications

andfeaturesfoundintheseearlierunitsplus:lessthan1/3%harmonicdistortionatanypower

outputupto30wattsandatanyfrequencyintheaudiospectrum,20to20,000cps;lessthan

1/2%intermodulationdistortionifinstantaneouspeakpowerisbelow60wattsforanycombin-

ationoffrequencies20to20,000cps;andnoiseandhumlevel90dbormorebelowratedoutput.

ThefamousMcIntoshhighefficiencyoutputcircuitisusedtoobtainthehighstandardofper-

formancefoundinthisamplifier.

TheMC-30maybeoperatedfromanysignalsourcedelivering0.5 ormorevolts,ordirectly

froma McIntoshAudioCompensatororPre-Amplifier,suchastheModelsC-8,C-4,C-104,

orC-108.Outputimpedancesof4,8 and16ohmsareprovidedfordirectconnectiontoloud-

speakers.Additionaloutputsfor166ohms(70.7volts)and600ohmsareprovidedforusewith

multiplespeakersystems,lines,etc.

INSTALLATION

Location

TheMC-30shouldbelocatedina ventilatedarea.Iftheamplifierishousedina cabinetor

otherenclosure,holesshouldbeprovidedforaircirculation.

InputConnections

1.Whena McIntoshAudioCompensatororotherMcIntoshpre-amplifierisusedwiththe

MC-30,plugthepre-amplifier'soutput-powercordintothe"Pre-Ampinput"receptacleonthe

MC-30andturnthe"gain"controlfullycounterclockwise.Thisreceptaclesuppliesthere-

quiredplateandfilamentpowertothepre-amplifierequipmentaswellasprovidingtheneces-

saryaudioconnection.

Forpre-amplifierinstallationandoperationrefertothepre-amplifier'sinstructionmanual.

2,Whena signalsourceof0.5 voltsormoreisusedtodrivetheamplifier,suchasthe

outputfroma tuner,taperecorder,orpre-amplifier,plugthesourceintothe"0.5 voltinput"

pinjackreceptacleorconnecttothe"0.5volt"and"GND"screwterminals.Usethe"gain"

controltoobtainthedesiredoperatinglevel.

GUARANTEE

Weguaranteetheperformanceofthisequipmentandthemechanicalandelectricalworkman-

shiptobefreeofdefectsfora periodof90days.Thisguaranteedoesnotextendtocomponents

iamagedbyimproperusenordoesitextendtotransportationtoandfromthefactory.

SERVICEINFORMATION

AllMcIntoshequipmentisdesignedfarlongtroublefreeoperation.Allcomponentsareof

highestqualityandareconservativelyoperated.Iftroubledevelopstheamplifiermaybeser-

vicedbyyourfranchiseddealer,a competentserviceman,orreturnedtothefactory.Equip-

mentwillnotbeacceptedatthefactoryunlessfactoryreturnauthorizationisfirstreceived.

Thefollowingchartofoperatingvoltagesandresistancesisofferedasa guideforservicingthe

unit.Allvoltagesandresistencesaremeasuredtochassisexceptthosewithasterisk(*).

Thesearemeasuredtochassiswithpin#2ofthe5U4GBgrounded.Voltagesaremeasured

withhighimpedenceVTVM.NOTE--UNITMUSTBETURNEDOFFWHENMEASURINGRE-

SISTENCES.

VOLTAGEANDRESISTANCECHART

Tube

12AX7

(Input)

12AU7

12BH7

PinNo.

4&5

6,7,8

3&8

4&5

3&8

4&5

DCVolts

NoSignal

134

1.2

Fil

270

134

138

Fil

270

110

Fil

355

Fil

355

Fil

DCVolts

at30Wout

120

1.1

6.3 V.actoPin9

235

120

126

6.3 V.actoPin9

235

100

•

295

6.3 V.actoPin9

295

ACVolts

at30Wout

1.3

0.24

0.22

0.57

132

0.32

132

Resistance

Unitoff

330K*

3.3K

0to70

40*

330K*

13K

0to70

43K*

26M*

0to70

12K*

220K

1.2K

0to70

12K*

220K

0to70

ELECTRICALANDMECHANICALSPECIFICATIONS

SpecificationsfortheMcIntoshModelMC-30AudioAmplifier

PowerSupply

PowerConsumption

PowerOutput

Inputlevel

FrequencyRange

HarmonicDistortion

IntermodulationDistortion

ImpulseDistortion

NoiseandHumLevel

DampingFactor

InputImpedance

OutputImpedance

PhaseShift

TubeComplement

AuxiliaryEquipment

connection("Pre-Amp

input"receptacle)

Size

Weight

Finish

117/125volta,50/60cycles

135wattsat30wattsoutput

105wattsatzerosignaloutput

30wattscontinuous

Input#1(pinjackandscrewterminalsandpin

5ofpre-ampsocket).5voltsto30volts,with

gaincontrolInput#2(pin2 ofpre-ampsocket)

2.5 volts,(ForusewithMcIntoshpre-ampli-

fierequipment)

20to30,000cycles± .1dbat30wattsoutput

15to50,000cycles± .5dbat30wattsoutput

10to100.000cycles± 1 dbat15wattsoutput

Lessthan1/3%at30wattsoutputorless,20

to20,000cycles

Lessthan1/2%ifinstantaneouspeakpower

isbelow60wattsforanycombinationoffre-

quencies20to20,000cycles

Negligible

90dbormorebelowratedoutput

12orbetterfor4,8 and16ohmoutput,16

for600ohms

0.5 megfor0.5 voltinputand0.13megfor

2.5 voltinput.20cyclesto40Kc

4,8,16.166(70.7 volts)and600ohms(600

ohmisbalancedtoground)

20cycles3°

20,000cycles9°

Pre-Amp:12AX7

PhaseInverter:12AU7

VoltageAmp:12BH7

Driver:12AX7

Output:2--6L6GC/1614

Rectifier:5U4-GA

DesignedtopowerC-8andotherMcIntosh

Pre-Amplifiers

13"x 8"x 8"high,chassistypeconstruction

30.5 pound,net

ChromeandBlack

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