Sinclair Project 80 Скачать руководство пользователя страница 5 | Manualshive

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Содержание Project 80

Страница 1: ...I llnEl lr PROJECT 80 Constructional andtechnical information onSinclair project80modular high fidelityamplif iersystem tl...

Страница 2: ...ormance Connections SeeSection86 Tunersotherthan P80 Tape recordlng Commonfaults Alignment ControlModulesStereo80 and AFU Stereo80 Circuitdescription Circuitdiagram Layout Performance Connections Powe...

Страница 3: ...9 29 2q 30 30 30 30 30 30 Apology We regret that due to circumstances beyond our control the layout and design of this first edition of the Project 80 manual has been rushed We apologise for any resul...

Страница 4: ...hardware etc to suit their cabinets or your localshopshouldbe ableto supplyallthe required items AB3 Notes l The Z40s are mounted on heatsinkblocks as shown in 41 2 The nuts and bolts indicatedabove a...

Страница 5: ...gs A 5 4 1 8 6 AC3 Notes 1 The plinthwe use in this exampleis the BSR McDonaldAp1 suitablefor HT70 MP60and 610decks lt measures405x 370 x 88mm approx When choosingan alternativeplinth make sure it ist...

Страница 6: ...them all before startingassembly Item Ouantity Description 1 Masterlink 1 ProjectB0preamplifier 1 PZ5power supply 2 240amplifiers 1 Mainsswitch unit with wires Wires items6 to 13areallpackedin one ba...

Страница 7: ...hers I 3 684 nuts tormounting 3 684 shakeproof washers I preamplifier 1 eachitems as19formountinq switch unit 2 Anglebrackets r 8 684 screws I 8 68 4nut formounting 201 211 221 z J l 8 684 nuts I mast...

Страница 8: ...e deck manufacturer lf you are not using them cut them off com pletely Adding tuner decoderand AFU can be done using the extra wires items15 17 Connections for these extra modulesare asshownin AB1 AFU...

Страница 9: ...he power amolifiersshould be mounted on metal for heat dissipation Seesections 43 2 and D6 3 Severalcommercially available cabinetsare available for project 80 addresses of suppliers aregivenin sectio...

Страница 10: ...o the L 1 0 connection on the PZ5 or 6 or to the 240 volt input on the PZ8 transformer MainsNeutralconnectsthrough the second pole on the switch to N on the PZ5 6or to Ov on the transformerprimaryof t...

Страница 11: ...dicator LED Indicators are now readilyavailable These work Jrom dc so must be connectedbetween tve the power supply via a suitable lirniting resistor and earth A currentof about 20mA is suitablefor mo...

Страница 12: ...rth c Both channels work the preamplifier isat fault The 740 260 or its wiring is at fault Exchangeall wiring from leftZ40 onto the right hand 240 and vice versa a faultisnow on otherspeaker thenthis2...

Страница 13: ...ules 270 l2w 86 3 Low VoltageUse 1 l 22v wellsmoothed may befed intopoint2 11 17voltsuseis possible if the followingmodifications aremade 1 Replace D2 tuner or D1 decoder by a 9v 1w zenertakingcare to...

Страница 14: ...eof the signalin the detectorcircuitand shouldbe sei to givea symetrical S curvewith a F M sweepsignalapplied lcl hai a limitingcircuitbeforethe detectorstagewhich providesa very good degreeof a m rej...

Страница 15: ...tations This should vanish when a station of good strength is tuned in lt can be reduced howeverby mountingthe tuneron a metalplate or liningthe front of the wood panel with metal foil beneath an insu...

Страница 16: ...ptionimpossible A poor 1F strip will invari ably resultin poor separation It isnot possible to supplydetailed conversion instructions for any particular tunerand the conversion can sometimesbe very di...

Страница 17: ...TRl is a virtual earthstagewith C4 C5 R5and R6 as feedback comDonents andR1in series with the inductance of the magnetic pick up as the sourceof impedance The circuitin fact utilises the inherantprope...

Страница 18: ...input has a sensitivity of 100mVand the tape 30mV Almost every signalsource you may wish to usewill feed one or other of these inputs but if you wish to reducethe sensitivityof eitherone the alternat...

Страница 19: ...R7 and C6 r I CB2 AFU circuit C86 Power supply TheAFU will operatefrom below 12Vto 50V The maximumoutput isvoltagedependant and if clippingoccursat lowervoltagesR7 can be reducedto 6K8 or so lf the AF...

Страница 20: ...n batterya 5 pole2 way switch could be used for this override the spare pole being used to switch off the AFU CB B I AFU wired for tape socket CONNECTIONS TO A F U c B 8 1 6 P I N D I N P L U G VIEWED...

Страница 21: ...You will alsoneed betterheatsinking where the amplifieris used for high powersratherthan the for normaldomesticuse As a test of your heatsinking feelthe blackfin of the amplifier lf this underallcondi...

Страница 22: ...ould be able to supply the current indicated above For battery operationthe capacitorshown as C3 in D5 must be included but itsvalueshould be increased 1000pF isto be considered the minimum value but...

Страница 23: ...cessive leadlengthsor layouts which placeoutputsand inputstoo closetogether DA Z4O DAl TechnicalDescription Theinputsignalisapplied to Tr1 sbase whichcomparesit with part of the outputand amplif iesth...

Страница 24: ...ermissible load impedance 4 8 or 16t Protection safeooencircuit 3A currentlimitintolow imoedance Dampingfactor 50with 8fl load Powerbandwidth 30Hzto 35KQHz 3 db Inputsensitivity 90 mV for 12wintoBl DA...

Страница 25: ...w Caremust be takenwith the wiring which shouldbe as short as possible Fig D89 2 2shows the wiring of the bridge with the two amplifiersmounted aboul 1 2 to 1 apart oneof the heatsinkblocks shown in f...

Страница 26: ...S6 Inputs Fig DB9 4 2 a b show two input circuits a is a virtual earth invertingmode input and the gainwill be approximately Zf 100K R4 b is a non invertinginput which shouldbe usedfrom a low source i...

Страница 27: ...To test the circuit disconnectit I outputs replaceFS1 by a 1aslow blow and switch on with a voltmeteracrossthe output The voltage will rise quickly to about 15v and will then slow down stopping at 35v...

Страница 28: ...t the same time if the output voltage is at its nominal value of 50v T16isturned hard on by the referencedevelopedon its baseby R10 and R11 The tail currentthrough the differential pair is then limite...

Страница 29: ...4 The curve shows the re entrantcurrent limitingon the PZ8 Mark 111 and how this behaveswith a resistiveload Refer to the technical description for moreinformation At A the circuithasswitchedon and st...

Страница 30: ...ut It alsohasalternative connections by meansof push fitwires for pickup when the whole projectis to be plinth mounted Facilities arealsoprovidedfor connectionof headphones The masterlinkalsocontainsd...

Страница 31: ...TOP a a Y r AFU Templates TOP I Tuner Removeareamarked whenmountinoon metal Switch Unit TOP Masterlink rr o n TOP 6mm d Y rh r Preamp f tfr holes 7e 3mm Theseholest 5mm Q 1...

Страница 32: ...writtenby Richard J Torrens illustrated by StanNorth Publishedby SinclairRadionicsLtd London Road St lves Hunts PE17 4HJ Designedand Printedby Photo PrecisionLtd St lves Hunts Publicationnumber TFOI...

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