RCA-Victor-Co-Inc-R-103-S 电路原理图.pdf

PAGE 661-C Model R -103-S MOTORBOARD- TURNTABLE BRAKE TURNTABLE TURNTABLE SPINDLE START STOP / CRANK NOLE FOR WIND NG VOLUME. CONTROL PICKUP SPEED REGULATOR Spring -Wound Record Player with Crystal Pickup Electrical and Mechanical Specifications Motor Spring -wound, Governor Type Speed 78 r.p.m. (adjustable) Record sizes 10 -inch and 12 -inch CRYSTAL PICKUP Impedance.100,000 ohms at 1,000 cycles Average Output Voltage 1 Volts at 1,000 cycles across 250,000 ohms load Dimensions 6 -in high, 12) -in. wide. 10 -in, deep REFER TO MODEL 0-2 FOR SERVICE DATA ON SPRING MOTOR Tone Compensation Because of the widely varying frequency characteristics of various types of audio amplifiers with which the Victrola Attachment may be used, it may e desirable in some cases to alter the pickup circuit of the Victrola Attachment to compensate for the characteristics of the amplifier. The following circuits show means of making such refine. ments. In A R1 controls the low -frequency response; larger values of R1 give increased lows. For maximum low -frequency response, remove R1. R2 controls pickup output, smaller values of R2 giving increased output. Cl controls high -frequency response; to increase highs, increase Cl. CRYSTAL PICKUP Cl -82MMF. Where a decrease in high -frequency response may be desired (for example, as an aid in reducing needle scratch on worn records), the circuit in B is applicable. In this circuit, C2 acts as loading on the pickup and is also a controlling factor on the high -frequency response. Smaller values of C2 give more pickup output and also more highs. R3 gives a sharper high -frequency reduction; increasing R3 decreases highs. The suggested values shown in A and B should serve as a basis from which slight alterations may be made to suit individual cases B R3-22,000f1 WVVW- C2 CRYSTAL , 27 PICKUP f MM. VOL. CONTROL Replacement Parts Insist on genuine factory -tested parts, which are readily Identified and may be purchased from authorized dealers. STOCK DESCRIPTION STOCK DESCRIPTION ASSEMBLIES 35929 Pivot-Pivot arm and shaft . 34311 Ring-Retaining ring for pickup arm pivot shaft 33373 Bearing-One set governor bearings 33529 Screw-Pickup needle screw 33386 Gear-Intermediate drive gear and shaft 13859 Gear-Winding gear-located on spring barrel. MISCELLANEOUS ASSEMBLIES 13858 Gear-Worm gear-located on winding shaft 13857 Governor complete 33682 Brake-Turntable brake 13854 Motor-Motor-less winding key 36076 Control-Volume control 13860 Shaft-Winding shaft and socket-less gear. 33371 Cap-Turntable spindle cap 33367 Spindle-Turntable spindle shaft and gear 35467 Decalcomania-RCA Victrola decal 13835 Spring-Main spring and barrel 33681 Escutcheon-Speed regulator lever escutcheon. 13862 Weight-Governor weight and spring 33685 Key-Winding key 3981 Knob-Volume control knob PICKUP ASSEMBLIES 33679 Lever-Speed regulator lever 35809 Mounting-Rubber bushing, washers, and nut 33591 Arm-Pickup arm-top shell only for pickup arm mounting 34482 Base-Pickup mounting base 31048 Plug-Male plug for output cable 34758 Bushing-One rubber and one metal bushirg for 33372 Sleeve-Rubber drive sleeve and drive plate pickup arm 13851 Spring-Brake spring Turntable-Turntable-less 33122 Crystal-Pickup crystal cartridge 33389 spindle cap RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN