前置放大电路.doc

电路图： Parts:部件： R1_____________270R 1/4W Resistor R2_____________100K 1/4W Resistor R3_______________2K2 1/4W Resistor R4______________39K 1/4W Resistor R5_______________3K9 1/4W Resistor R6_____________390K 1/4W Resistor R7______________33K 1/4W Resistor R8______________75K 1/4W Resistor (or two 150K resistors wired in parallel) R9_____________560R 1/4W Resistor C1_____________220pF 63V Polystyrene or Ceramic Capacitor C2_______________1µF 63V Polyester Capacitor C3______________47µF 25V Electrolytic Capacitor C4______________10nF 63V Polyester Capacitor 5% tolerance or better C5_______________1nF 63V Polyester Capacitor 5% tolerance or better C6,C9__________100nF 63V Polyester Capacitors C7,C10__________22µF 25V Electrolytic Capacitors C8,C11________2200µF 25V Electrolytic Capacitors IC1___________LM833 or NE5532 Low noise Dual Op-amp IC2___________TL072 Dual BIFET Op-Amp IC3___________78L15 15V 100mA Positive Regulator IC IC4___________79L15 15V 100mA Negative Regulator IC D1,D2________1N4002 200V 1A Diodes J1,J2___________RCA audio input sockets J3______________Mini DC Power Socket R1_____________270R 1/4W电阻R2_____________100K 1/4W电阻R3_______________2K2 1/4W电阻R4______________39K 1/4W电阻R5_______________3K9 1/4W电阻R6_____________390K 1/4W电阻R7______________33K 1/4W电阻R8______________75K 1/4W电阻（或两个15万电阻并联有线）R9_____________560R 1/4W电阻C1_____________220pF 63V聚苯乙烯或陶瓷电容器涤纶电容器C3______________47μFC2_______________1μF63V 25V的电解电容C4______________10nF 63V 5％涤纶电容公差或C6更好C5_______________1nF 63V涤纶电容器5％或更好的耐受性，涤纶电容器的C7 C9__________100nF 63V，25V的电解电容C8座C10__________22μF， C11________2200μF25V的电解电容IC1___________LM833或NE5532双低噪声运算放大器IC2___________TL072双BIFET运放IC3___________78L15 100mA的15V的正15V的稳压器IC IC4___________79L15 100mA的负调节蛋白D1集成电路，二极管J1的第1A 200V的D2________1N4002，J2___________RCA音频输入插座J3______________Mini直流电源插座 Comments:评论： Any electronics amateur still in possess of a collection of vinyl recordings and aiming at a high quality reproduction should build this preamp and add it to the Modular Preamplifier chain.任何电子产品仍拥有业余的乙烯基唱片收集和针对高质量再生产应该建立这种前置并将其添加到模块化前置放大器链。

This circuit features a very high input overload capability, very low distortion and accurate reproduction of the RIAA equalization curve, thanks to a two-stage op-amp circuitry in which the RIAA equalization network was split in two halves: an input stage (IC1A) wired in a series feedback configuration, implementing the bass-boost part of the RIAA equalization curve and a second stage, implementing the treble-cut part of the curve by means of a second op-amp (IC2A) wired in the shunt feedback configuration.该电路具有非常高的输入过载能力，低失真和美国唱片工业协会均衡曲线精确复制，在两阶段的运算放大器电路中，美国唱片行业协会在均衡网络分裂成两半：一个输入阶段（IC1A感谢）有线一系列反馈配置，贯彻落实美国唱片行业协会均衡曲线低音部分和推动第二阶段，实施了第二个运算放大器（IC2A）在并联反馈配置有线指曲线高音切一部分。

This module comprises also an independent dual rail power supply identical to that described in the Modular Preamplifier Control Center.该模块还包括一个独立的双电源轨相同，在前置放大器模块控制中心描述 As with the other modules of this series, each electronic board can be fitted into a standard enclosure: Hammond extruded aluminum cases are well suited to host the boards of this preamp.正如本系列，每个电子板的其他模块可以安装到标准的机箱：哈蒙德挤压铝案件非常适合举办这些前置的董事 In particular, the cases sized 16 x 10.3 x 5.3 cm or 22 x 10.3 x 5.3 cm have a very good look when stacked.特别是，案件大小16 × 10.3 x5.3厘米或22 × 10.3 x5.3厘米有一个非常好的看时堆叠。

See below an example of the possible arrangement of the rear panel of this module.见下面一对这个模块后面板有可能安排的例子 Notes:注释： · The circuit diagram shows the Left channel only and the power supply该电路图显示左声道和电源仅 · Some parts are in common to both channels and must not be doubled.在某些部分是常见的两个通道，不能增加一倍 These parts are: IC3, IC4, C6, C7, C8, C9, C10, C11, D1, D2 and J3.这些部件包括：IC3处理，IC4，C6的C7，C8和中c9，C10中，C11的，D1，D2级和J3 · IC1 and IC2 are dual Op-Amps, therefore the second half of these devices will be used for the Right channel IC1和IC2为双运算放大器，因此这些设备下半年将通道使用权 · This module requires an external 15 - 18V ac (50mA minimum) Power Supply Adaptor.这个模块需要一个外部15 - 18V的交流（50mA的最小）电源适配器。

Technical data:技术数据： Sensitivity @ 1KHz: 4.3mV RMS input for 200mV RMS output @ 1KHz的灵敏度：4.3mV有效值RMS输入为200mV的输出 Max. 马克斯 input voltage @ 100Hz: 53mV RMS @ 100Hz的输入电压：53mV有效值 Max. 马克斯 input voltage @ 1KHz: 212mV RMS @ 1KHz的输入电压：212mV有效值 Max. 马克斯 input voltage @ 10KHz: 477mV RMS @ 10 kHz的采样输入电压：477mV有效值 Frequency response @ 200mV RMS output: flat from 30Hz to 23KHz; -0.5dB @ 20Hz 频率响应@ 200mV的RMS输出：从30Hz到23KHz持平; - 0.5dB的@ 20Hz的 Total harmonic distortion @ 1KHz and up to 8.8V RMS output: 0.0028% 总谐波失真@ 1kHz和高达8.8V RMS输出：0.0028％ Total harmonic distortion @10KHz and up to 4.4V RMS output: 0.008% 总谐波失真@ 10kHz至最多至4.4V RMS输出：0.008％ A possible arrangement of the rear panel of this Module作者：这个模块后面板有可能安排 。