我的第二版TDA1541 DAC

文招

我现用三个820R/3W的并联代替，所有的大电阻都不贴板，有利于散热[em06]

文招

我的LM317的第一级电压差调高了：
坛上的3k:220R=18.9V  1K5:220R=9.7V
我的1K8:120R=20V  910R:120R=10.7V
这样应该第二级的稳压会更好吧

[em06][em06][em06]
至于电容，所有退耦用的小电解我也全部都用100uF/35V的ELNA棕神[em11][em11][em11][em11][em11]

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以下是引用teco在2005-2-18 4:40:00的发言：
6N11是做一级共阴放大么?<I></I> 680UF会不会听上去有点闷,<I></I> 低音过多?

大部分元件都是根据手上的存货拿好看的装上[em11][em11][em11]
比如我的滤波电容全用4700uF的，我都觉得小了点。但手上的大电解要么不好，要么体积太大[em02][em02]
还是我的老话，等米用不如找米用[em11][em11][em11]

文招

以下是引用Leon428在2005-2-18 6:25:00的发言：
音色上能听出来改善还是信噪比提高了？

还没有上电试响呢。只是在路测了各点的工作电压正常，
我有第一版试听，第二版不急着响的。
现在只是力求做好每一步，比如我的正负5V电压每个实测都是5.03V,+15V实测15.00V.
现在我缺鍍金集成座，集成仅仅是插上拍照，还未焊接。想直焊上又怕以后换听不方便[em02]
那电感的安装方向我认为是最佳的了（第一版换方向试听过多次）[em06]

zccg

“为求配对，从几百个之中挑选了14个WIMA 0.1uF，误差控制在小数点后一位。”文招果然厉害，够音响DIY王了！

Leon428

音色上能听出来改善还是信噪比提高了？

teco

6N11是做一级共阴放大么? 680UF会不会听上去有点闷, 低音过多?

HQ

阴极电容用ELNA的680uF/35V棕神估计比较合适


[em11]

我未试过。锻估。[em11]不过一定要坚野[em06][em11][em09]

swuzzy

数字部分3300P电容和两个10N输入电容换成了3角钱一只的蓝色高压瓷片电容，感觉声音素质有了很大提高，尤其是听小提琴，高音部分真实了许多。

HQ

慢慢来[em06]

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[em11][em11][em11]

HQ

[em11]

PCB有些地方布线欠妥

[em06]

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[em06]

HQ

<img src="attachments/dvbbs/2005-2/200521805337740.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521805337740.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />


[em09][em09][em11][em11]

文招

<img src="attachments/dvbbs/2005-2/200521804819951.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521804819951.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
灯丝的井流管是西门子的R306,其它的都是小日本的30DF2快速井流管
<img src="attachments/dvbbs/2005-2/20052180514152.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/20052180514152.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

文招

<img src="attachments/dvbbs/2005-2/200521803859126.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521803859126.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
我的高压变压是双240V的，所以有二个限流电阻改为3K9,6N11的屏极退耦加并SPIRIT的2.2uF,实测屏压160V
<img src="attachments/dvbbs/2005-2/20052180433836.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/20052180433836.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
6N11的栅阻和阴阻用老美的AB碳阻，阴极电容用ELNA的680uF/35V棕神<img src="attachments/dvbbs/2005-2/200521804533544.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521804533544.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

文招

<img src="attachments/dvbbs/2005-2/200521802441114.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521802441114.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
7806已换LM317,灯丝先调至5.7V试音（LM317的电阻用120R和430R,以后有可能换用470R,就有6.1V了）
<img src="attachments/dvbbs/2005-2/200521802915354.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521802915354.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
其它三个LM317也换大散热器了，调整端的o.o1uF换ERO 3.3uF,全板所有并在电解上的小电容都用WIMA 1uF
<img src="attachments/dvbbs/2005-2/200521803254382.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521803254382.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

文招

第二版改上CS8412-IP和TDA1541A R1(可惜没有S1)
[em09]
<img src="attachments/dvbbs/2005-2/200521801532920.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521801532920.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
为6Z4盖的屏蔽房子，又加上电感滤波
<img src="attachments/dvbbs/2005-2/200521802012475.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/200521802012475.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
这个ERO用在此20脚正好<img src="attachments/dvbbs/2005-2/20052180229284.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-2/20052180229284.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

文招

但我并没有误导大家啊[em00][em00][em00]

pot

随便找个垃圾的6DJ8/6922都比垃圾垃圾的6N11好多了，我刚装完也用的是6N11直接上的，毁人呀。
老兄不是有好的管子吗。就别用这个6n11垃圾来误导大家了。