UPC1342V 150w * 2 dual channel HiFi class A and B post-stage power amplifier

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wj_88

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核心元件：NEC公司继性能优异的宽带低失真50W推动电路UPC1225H之后，为了适应大功率的要求又推出了新一代音响驱动IC---UPC1342V，该IC除具有UPC1225H所有优点及基本相同的外围电路外，其输出电压偏差更小（正负5MV）、电压适应范围更宽（正负20~正负70V）、推动功率更充裕，堪称烧友自制功放的首选IC。可以用两块UPC1342V组成2*150W功放电路结构如下图。（这批印板出错，有跳线，套件 PCB收到货后联系客服）

核心元件：采用全新的ON大功率管NJW0302G/NJW0281G，这对管子有着很高的测试评价。著名音响杂志《无线电与电视》2008第三期对安美森新研发推出的，该对管其声音表现与NJW3281/NJW1302很相似，声音非常浓密且颗粒感细致，密度也极高，但感觉恰到好处，声音更显成熟，伸缩有致，具有一定的湿润感和沉稳感，相当艳丽与妩媚。该对管控制力极佳，末级工作电流在较大范围内变化时的表现相当一致，不会因工作电流的大小出现音色的明显转变现象。该三极管参数：15A、250V、150W。 

功率管根据你的喜好还可以使用：1、【ON】大功率管王MJL4281A/MJL4302A；2、东芝音响对管 2SC5200 2SA1943；

大电解：尼吉康50v12000uF电解，UPC1237+OMRON喇叭保护搭档，线路放大采用718电阻，音频专用耦合、退耦电容。

本板线路：采用UPC1342V直推ON大功率管的线路，线路简洁，稳定，声音十分通透。采用整流、滤波、保护、放大一体板，实用整洁美观。

甲类电流：在变压器、散热器温度允许的情况下，尽量调大静态电流吧，感受甲类功放（温暖、通透、控制力好）的动人魅力！此板调试方法： 此板左右声道有一个可调多圈电位器，用于调节功率管的静态电流（甲类电流）。此板焊接完成后 ，在通电前，先将可调电位器逆时针旋转到头（此时静态电流为0）。 进行通电试音，确认放音无问题后，再缓慢沿顺时针调节电位器，同时检测0.22欧电阻电压（如44mV 时，静态为200mA，用mV档测量功率管的E对输出也可以），将静态电流调节到需要值。注意:因为温度反馈的作用，随着散热器的温度上升，静态电流会被拉下来一点，需要多次测试、调试。   

推荐电压：交流电压范围：AC25-AC36v*2，推荐将每对管静态电流调整到100mA；

输出功率：根据电源电压的不同、喇叭阻抗的不同，输出功率20-150w；当AC35v供电时，可以输出100w*2/8欧，150w*2/4欧。                   

印板尺寸：165*97mm；   印板2mm厚、70um铜箔（铜厚才是硬道理）；

中点电压：1mV左右；

信噪比：108dB，噪音电平：0.2mV；

配套散热器，每对管可以调到100mA；  

https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1017895944.51.wdyaKi&id=550180070414

  

成品板如下图：成品板已经焊接、调试、测试ok（背后左右声道各有一处跳线）

散热器的图片：

套件如下图：  下图套件仅88元，该印板空间上支持直径35mm的大电解，支持大三肯功率管，可以灵活使用各种大电解及功率管。板上的TP1、TP2是调试静态电流用，测试0.22欧电阻两边的电压（mV档），例：如要100mA静态，就调整到22mV。注意:因为温度反馈的作用，随着散热器的温度上升，静态电流会被拉下来一点，需要多次测试、调试。  

 

 

 

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Color Classification

• One printed board 
• Without large electrolysis, large tube kit 
• ON tube finished board 
• Matching radiator 
• Pure final machine 

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Inventory Quantity 2382

 

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