Ferranti-Arcadia34-rec-维修说明书手册含电器原理图

望围H单围D"TRADER"SERVICE·SHEETFERRANTI ARCADIA7211934-5 AND ARCADIA GRAMFoas8e.mingand a rectifierare employed in theR4 is in low potential end of circuit,acrossFerranti Arcadia9545eo品R4.nddesigned to operateReaction coupling from anode by coilsL12,L13,augmentec149 mains of,200:250V,4003>by themmon imin'a later version than ours,pedance of C31,C32via C7.Imagewith a method of identification of suchchassis,are explainedunderChassiga28n丹ic8Divergencie略overleaf.chassis is via $4,C5,by-passingAn identical chassis was employed inSecond valve (V2,Ferranti metallisedVPT4)is a variable-mu RF pentode oper-circuit.7i经，intermediate frequeney ampliferatinRelease date,both models,1934.tuned-primary,uned-secondarycea:Arcadia..1515a.transformer couplings C33 (returnedArcadiagram,31 10s.cathode)L14,L15,C34 and C35,L16,L17;c36.CIRCUIT DESCRIPTIONAerialIntermediate frequency 125 ke/s.Diode second detector is part of doubleLa.L4 are tuned byodevalve(V3,Ferranti metal.C25;secondaries L8,L8 by C27.Couplinglised H4D).Audiofrequency component(MW)and L7which is formed byin rectified output is deveof L9,on LW,load resistor R12 and passed via AF coup-The appearance of the Ferrantiwith capacitative coupling by.the commonling capacitor C14,tag x to the upperimpedance of C2.DIcK-uprminaland mnual volumeonArcadia 1934-5 AC superhet.TheFirst valve (V1,Ferranti metalllsedtrol R13 to CG of triode aection,whichsmall knob above'the'scale is theVHT4)isa heptodeoperating as fre.operates as AF amplifier.tone control,quency changer withIF filtering by:C12,R11,C13 in diode(LW)are tuned by C29..Parallel trim-of gramophoneCircuit diagram of the Ferranti Arcadia 1934-5 superhet,serial numbers 54,ooo to 69,999.The differences in a modified version,wlie between 200,oo0 and'20,o00,concern the omission of the HT potential divider R6,R7,R8,R9,and are described overleaf.ThV3 triode andV4 is mainly resistance-capacitance,but a special AF transformer is included to obtain high-note emphasis.Tag Xpick-up operation.