Russco Fidelity-master Manual Download | Manualshive

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STEAM POWERED RADIO.COM

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Summary of Contents for Fidelity-master

Page 1: ...STEAM POWERED RADIO COM FIDELITY PRO FIDELITY MASTER MONO STEREO PHONO PREAMPLIFIERS ...

Page 2: ...l repair or replace products which prove to be defective during the warranty period provided they are returned to Russco Warranty subject to cancellation if in the opinion of Russco the product has been either unduly tampered with or modified so as to cause failure bey ond our control No other warranty is expressed or implied We are not liable for consequential damages RUSSCO ELECTRONICS M FG INC ...

Page 3: ...available in either stereo or mono versions with unbalanced or balanced transformer output A special feature of all models is the use of two integrated circuits for each channel a low noise preamp unit coupled to a high slew rate output unit This allows output levels to 18dBm into a 600 ohm line over the full audio spectrum The following table is provided as a quick reference to illustrate the fea...

Page 4: ...z Input Sensitivity 1 millivolt RMS at 1KHz for OdBm output Crosstalk Stereo Models Only Greater than 55 dB down at 15KHz greater than 65 dB down at 1KHz Input Impedance 47 000 ohms Output Impedance 600 ohms for transformer models less than 10 ohms for unbalanced models Filters Fidelity Pro models 4 I Low Frequency Flat Cut 3 dB at 70 Hz 8 dB at 30 Hz I High Frequency Boost 3 dB at 5KHz 5 dB at 10...

Page 5: ... ip on the rear panel For unbalanced models use single or two conductor shielded line connecting grounds at the terminals marked or GND Connect center or hot lead to the terminals marked These models need not be terminated in any particular toad but if termi ated the load should be no less than 600 ohms If two conductor shielded line is used the shield should he grounded at one end only Balanced m...

Page 6: ...dance to some value above 600 ohms IN CASE OF DIFFICULTY The following preliminary steps are recommended as a prelude to actually trouble shooting the preamp itself If these steps prove insufficient in solving the problem the preamp should be returned to the factory for repair or serviced by a qualified technical person See Servicing the Preamp on pages five and six for technical guidelines A Prea...

Page 7: ...e entire unit can be operated outside of the box TESTING The use of only high impedance AC and DC meters is rr ommended for testing the circuitry of the preamp The first test performed on a non operational unit should be for per DC voltages NOTE THAT THE CIRCUIT USES BOTH POSITIVE AND NEGATIVE DC VOLTAGES METER POLARITY WILL HAVE TO BE CHANGED WHEN MOVING THE TEST PROBE FRO II POSITIVE DC TO NEGAT...

Page 8: ...s on the list in a few days RETURNING FOR SERVICE Items returned for service should be packed well preferably in the original carton and shipped prepaid to the factory PLEASE DO NOT FAIL TO INCLUDE OR MAIL UNDER SEPARATE COVER A DESCRIPTION OF THE DEFECT Retu n c ari es rtill be prepaid if the item is in warranty Out of warranty items will be shipped freight collect of billed SPECIAL NOTE ON GROUN...

Page 9: ...m Dipped 1mF 35V 110 019 85 C6 11 16 20 21 II Ceramic Di c 0 01mF 100V 110 026 25 C7 12 15 17 II Tantalum Dipped 10mF 35V 110 017 85 C8 II Ceramic Disc 0 005mF 100V 110 025 25 C9 II Mylar Axial 0 001mF 200V 10 110 020 45 C10 II II II 0 0047mF 200V 10 110 021 45 C13 II Tantalum Dipped 0 15mF 35V 110 018 85 C14 II Mylar Axial 0 01mF 200V 10 110 022 45 C18 II Ceramic Disc 5pF 1 KV 110 023 25 C19 II C...

Page 10: ...LANCED MODELS RUSSCO PART NO 400 118 400 117 400 119 400 120 400 121 400 122 400 123 400 124 400 125 400 126 PRICE 26 75 36 00 45 00 64 00 76 50 114 50 60 75 79 75 98 50 136 50 Because of the l w reflected impedance of the integrated circuit driving the output transformer the true output i npedance at the secondary of the transformer is less than the rated 600 ohms This is q1 no consequence unless...

Page 11: ...VE 2 PH11 uAS llrA1J ScAG WS F qoM FRONT PAN L f u t L PAN SrRAIG IT Aw AY PAOM Box f Mov1NG P C BoARD J FM f LID 8 Y SL 1D1J 1 Ovr o Box G 1 1NSERT P C BoARD l N Bo x LowFR c oovEJ AWNG Lio Ovr A An A M A VIC k JT INt W Tl I At CG SS TO 7oP 31bC o c 80Aeo OQ g ...

Page 12: ...STEAM POWERED RADIO COM F1G 2 SrGNAL TRACING T sT SrTuP r t 100 A INPUT 44 7K A M AG l TIC P1ctc uP PRuM UMoER Tc s GNO PROSE 10 IOOmV Il z 600 n Osc1cLOSCOPE ...

Page 13: ... P C So a o MOWN IH J C D 2 PAAT NUM81ilt 1UrF R1tNCI t evsc ro sc c T c R1aHT CH NN L PAl T S PC SIG tl ATCO 19y 4 LRCTltO YTtC CAP C ITOft POt ARITtl A lo TCWIICD C N VIIO lfllaU S 0 P C e o 5 F PSB vE flsrON atto wN On 11 f soMii co _ oN rN oM TT o o JvMPc A0DIE 0 uN ALAMt O MOOira MAVL OoTP IT C ACITOfle C2 2 It HOL S MAf tcCO Fr4 3 _ P C BoARD COMPONrNT 12 ...

Page 14: ... Mooi LS N 1 v J 2 2K 10 1 I _J 6 1 C I MAY BE W 4739 Cl 500 C2 5 00 220 R2 v 1311 G Jl 2 N 2905 5 PART R FER NC Nv B Rs oA 1 H C1 111NN L CoMPONENT 5 _s 4 Sr P o r L 1sr FoJO Fv 11r cA CoMPt JN vr Drs c 1 PT O NS_ 3 Ri s sro I AL v s 1rv a 2 C APAc1 rO llf VA t UC IY M c OJ1 Jl OA4D S UN r ss 5P c1r1ro P C BoARo CoN T crs NOTES H 4 12 V rtiCHASSIS _LCIRCUIT Rl4 1001 10PI C l9 czo 01 1001 tO P F R...

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