Trafomatic Audio GLENN Manuale utente

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GLENN

PARALLEL SINGLE-ENDED MONO POWER AMPLIFIER

WITH EXTREME FLEXIBILITY

Table of Contents

Section Page No.

Safety Precautions 03

Getting Started 06

 AboutYourAmplier     06

Packaging/Preparationforuse   07

Controls and Their Functions 09

 FrontPanel      09

 RearPanel      11

Servicing13

Technical Specications    14

SAFETY PRECAUTIONS

IMPORTANT SAFEGUARDS PLEASE READ CAREFULLY

ALL THE FOLLOWING IMPORTANT SAFEGUARDS THAT

ARE APPLICABLE TO YOUR EQUIPMENT.

CAUTION! NEVER REMOVE PROTECTIVE TUBE COVER. PROTECTIVE GLASS

MUST BE INSTALLED AT ALL TIMES. NO USER SERVICE ABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

SAFETY

Read the User’s Manual and refer to it frequently during use of this product.Allthesafetyandop-

eratinginstructionsshouldbereadbeforetheproductisoperated.

Retain the User’s Manual.Thesafetyandoperatinginstructionsshouldberetainedforfuturereference.

Follow Instructions.Alloperatingandinstructionsforuseshouldbecloselyfollowed.

Power Sources.Thisproductshouldbeoperatedusingonlythetypeofpowersourceindicatedonthe

markinglabel.Ifyouarenotsureofthetypeofpowersupplyinyourhome,consultyourproductdealer

orlocalpowercompany.

Grounding.ThisproductisequippedwithathreeprongIECconnector.Alwaysusepowercordwithad-

equatewirecrosssectionandanelectricaloutletthatisgrounded.Ifyoudonotknowwhethertheoutlet

isgrounded,consultyourelectricianorlocalpowercompany.

Power Cord Protection.Powersupplycordsshouldberoutedsothattheyarenotlikelytobewalked

onorpinched.Payparticularattentiontocordsatplugs,conveniencereceptaclesandwheretheyexit

fromtheproduct.Alwaysusepowercordswithadequatecurrentratingsandsafetycertications(UL,

CE,TÜV,CSA,etc.)

Fuses.Forcontinuedprotectionagainstrehazard,replacefuseswiththesametypeandratingofthe

fusesspecied.Whenchangingfuses,completelyunplugtheACcordfromthewalloutlet.Ifindoubt

whatfusestouse,contactfactoryorauthorizeddistributor.

Tubes.Duringoperation,thevacuumtubesgetveryhot.Allowatleast60minutesafterremovingpower

fortubestocooldown.Onlyafter60minutesyoucanremovetheprotectivetubecover,iftubereplace-

mentisrequired.

Cooling.Toensureproperventilation,thereshouldbenothingplacedontopoftheunit.Ventilationholes

shouldbeunobstructedwithatleast12”(300mm)ofemptyspaceaboveandaroundtheunit.

Turn-off when not using for prolonged periods of time.Theampliershouldbeturnedoffwhennot

attended.Thatextendstubelife,savespowerandpreventsanypotentialhazardousconditions.

03 GLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibility

GLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibility

ENVIRONMENT

Water and Moisture.Donotusethisproductnearwater-i.e.nearabathtub,ashbowl,kitchen

sinkorlaundrytub;inawetbasement;ornearaswimmingpoolorthelike.Dampbasements

shouldbeavoided.

Heat.The productshould besituated awayfrom heatsources suchasradiators,heatregisters,

stovesorotherappliancesthatproduceheat.Alsoavoidputtingtheunitinthedirectraysofthesun.

For indoor use only.

PLACEMENT

Accessibility.Itisnormalforanaudiodevicetorunwarmifusedforprolongedperiods.Always

placeyourdeviceawayfromchildrenandpetstopreventburns.

Ventilation.Properventilationiscriticalforsafeandreliableoperationofallvacuumtubebased

equipment.Thisproductshouldnotbeplacedinabuilt-ininstallationorrackunlessproperven-

tilationisprovidedorthemanufacturer’sinstructionshavebeenfollowed.Neverplaceanything

ontopofyourunitthatcouldobstructairowandcausevacuumtubestooverheatanddamage

theunit.Donotplaceyourunitinaclosedbookcase;overheatingcouldoccur.Ensurethatthere

isatleast12”(300mm)ofopenspaceaboveandaroundtheunit.

Surface.Placetheunitonaatlevelsurface.Careshouldbetakentopreventobjectsfrom

fallingandliquidsfromspillingintotheunit.Donotsubjecttheunittoexcessivesmoke,dust,

vibrationorshock.

MAINTENANCE

Cleaning.Unplugthisproductfromthewalloutletbeforecleaning.Donotuseliquidcleaners

oraerosolcleaners.Useadryclothforcleaning.Donotuseanytypeofabrasivepad,scouring

powderorsolventsuchasalcoholorbenzene.

Tube replacement.Vacuumtubeshavelifeinthe10,000hoursrange.Werecommendreplac-

ingthetubesafter36months,ifnecessary,dependingonyourlisteninghabits.Thatwillensure

thattheunitalwaysperformsatitsbestandtubefailurewillnotoverstressotherpartsoftheunit.

Biasing the amplier. TheGLENNampliershaveautomatictubebiasing.Nouseractionrequired.

SERVICE

Replacement Parts.Whenreplacementpartsarerequired,besurethattheservicetechnician

usesreplacementpartsspeciedbythemanufacturerorpartswiththesamecharacteristicsas

theoriginalpart.Unauthorizedsubstitutionsmayresultinre,electricshockorotherhazards.

Tube replacement.Shoulditbecomenecessarytoreplacethevacuumtubes,removetheAC

powerplugfromthewallandallowsixtyminutes(60min)forthetubestocooldownandhigh

voltagecapacitorstodischarge.Followinstructionsoutlinedbelowinthesection“Handlingvac-

uumtubes”.Theprotectivetubecoverwithglasspanelsshouldonlyberemovedafterthe60

minutesperiod.

Modications.Modicationstotheamplierarestronglydiscouraged.Theunitwasdesigned

byexperiencedengineersandtestedforsafeandreliableoperation.Anymodicationmaypose

asafetyriskandresultinreducedlifetimeoftheproduct.Openingtheamplierwillvoidwarranty.

05 GLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibility

GETTING STARTED

ABOUT YOUR AMPLIFIER

Your GLENN Power Amplierwasdesignedtoprovideatruehigh-endperformancewhichis

aresultofcarefullydesignedcircuitandoptimizedcomponentselection.Thedesignutilizesthe

highestqualityparts,includingcustomdesignedtransformersandchokeswhicharetheresult

ofTrafomatic’s20+yearsofexperienceinthiseld.TheGLENNsitsrmlyontopoftheTrafo-

matic’sproductlineup,challengingcompetitioninanypricerange.

Thedesignisbasedonparallel-connected 300B direct-heated triodes (DHT)operatingin

pureClassA.The 300B tubes are paired with a professional E182CC tube.Rectier tube

is the highly-acclaimed 5U4G.Thiscombinationoftubesandmatchingtransformersoffers

12-26Wofunrestrainedoutputpowerwithallthesonicbenetsofsingle-endedampliercon-

gurations.

TheGLENNoffersunmatchedexibilitytonetubesoundqualityforbestmatchtodifferent

speakersandlisteningtastes.

FitandnishoftheGLENNarecomplementingitsimpressivesoundqualityandmakeitacen-

terofattentioninanyaudiosetup.

TheGLENNhasonebalanced(XLR)andoneunbalanced(RCA)input.Thereareoutputsfor

four(4)andeight(8)ohmspeakers.

HANDLING AND REPLACING VACUUM TUBES

Manypeoplehaveneverhadexperiencehandlingvacuumtubes.Processisverysimilarto

handlingincandescentlightbulbs.Aswiththelightbulbs,youshouldnottouchavacuumtube

whenitisoperatingsinceyoucanburnyourself.Similarly,ifatubeisdroppedonahardsurface

itmaybreakorchangecriticaloperatingparameters.

When replacing the tubes, allow sufcient time, minimum 60 minutes, for tubes to cool

downand internal capacitorstodischarge.Only then you canremoveprotectivecover with

glasspanelsandcarefullyremovethetubes.

Before you insert a tube youshouldmake certain that the unit is disconnected from the AC

outlet.Inspectthetubeforcracksandphysicaldamage.Makesurethatthepinsarestraight.

Ifyouneedtostraightenthepins,beverycarefulasitmaycausetheglassenvelopetobreak,

causingthetubetolosethevacuumandfailassoonastheunitspoweredon.Carefullyalign

thepinswiththesocketandgentlyinsertthetube.

ReplacetheprotectivecoverbeforeconnectingGLENNtotheACpower.

Never force a tube into a socket.

ThankstotheexceptionalexibilitytheGLENNcanuseallcurrentlyavailable300Btubes.The

tubechoiceshouldbefollowedbyanappropriatesettingofmaximumdissipation,assuggested

bythetubemanufacturer.Formoredetailsrefertothedescriptionofthefrontpanelcontrols.

ShouldyoudecidetobuyreplacementtubesfromTrafomaticAudio,restassuredthattheywere

fullytestedbeforetheshipment.

GLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibilityGLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibility

PACKAGING

Savetheoriginalpackaginginadryplace.Thepackaginghasbeendesignedtoprotectyour

devicefromstressesincurredduringshipping.

Usingpackagingdifferentfromtheoriginalincreasesrisksofshippingdamages.

PREPARATION FOR USE

Placeyourunitonaat,stablesurface.

Powerswitch,locatedontherearsideoftheunitshouldbeintheOFF(0)position.

Pluginthepowercord.

Connectaudiosourcetooneoftheamplier’sinputs.

Makesurethatvolumecontrolonyouraudiosourceissettominimumposition.

TurnontheGLENNbyusingON/OFFpowerswitchlocatedontherearsideoftheunit.

Allow30secondsforthetubestowarmup.

Slowlyincreasevolume,tomakesuretherearenounusualnoisescomingoutofthespeakers.

CONGRATULATIONS!YouareallsetandreadytoenjoyhighsoundqualityoftheGLENN

Mono Power Amplier.

07 GLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibility

GLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibility

CONTROLS AND THEIR FUNCTIONS

FRONT PANEL

Aquicklookat thefrontpaneluncoversmanypossibilitiesfor customizingtheGLENNtot

manyspeakersandlisteningtastes.

Alargemulti-purposeback-litinstrumentoccupiescentralpositiononGLENN’sfrontpanel.

InconjunctionwiththeInstrumentswitchitcanbeusedtomonitorbiasoftheoutputtubes,as

aVUorpowermeteroritcansimplybeturnedoff.Innormaloperation,withproperlybiased

goodtubes,theneedleontheinstrumentshouldbesomewhereintherangeof-1to+1on

thetopscale,orevenslightlyhigherifthehighertubedissipationsettingisselected.

Standby switch:whenthisswitchisinthestbypositionhighvoltageisturnedoffandonly

lamentpowerison.ThatmakesitpossibleforGLENNtostartquickly,afterthestandby

switchismovedtotheONposition.RecommendeduseoftheStandbymodeiswhenturning

ontheGLENNandbeforeturningitoff,andduringlongerbreaksinlisteningsessions,asthis

extendslifeofthetubes.

Instrument switch:thisrotaryswitchhasfourpositions:

OFF:thefrontpanelinstrumentisturnedoff

Bias V1andBias V2areusedtoadjustormonitorbiasofoutputtubesV1andV2,respectively

VU:inthispositiontheinstrumentisusedasaVUmeterorPowermeter

300b plate dissipation (w)switchcanbeusedtosetplatedissipationoftheoutputtubes

wherefoursettingsarepossible:18,22,28and32Watts.ThisswitchensuresthatGLENN

iscompatiblewithevery300btube availableonthemarket,fromourfavorite MeshPlate

300bto300BXLS.Whensettingplatedissipation,thetubemanufacturers’recommendation

shouldbefollowed.Herearefewexamplesofrecommendedplatedissipationsettings:

MeshPlate300B:18W

WesternElectric:22W

Electroharmonix,JJ,Soaandsimilar:28W

EMLXLS:32W

Feedbackswitchdeterminestheamountofnegativefeedback(NFB)appliedtothepower

stage;itcanbesettooneofthefourpositionsmarked0(noNFB)and-1dBto-3dB,higher

numberdenotingmorenegativefeedbackapplied.Thissettingmakesitpossibletooptimize

outputcharacteristicsoftheGLENNtosuitmanydifferentspeakers.

09 GLENN -ParallelSingle-EndedMonoPowerAmplierwithextremeexibility

Indice

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