我的627前级

holywen

我的627前级

这个是从wlm888兄那里买来的，王兄焊工非常强，是我学习的好榜样啊。哈哈

下面这个图是按版主们试验结果，我在opa627和buf634之间加了一个1k的1%贴片电阻。

我的627前级

qpzmg

以下是引用iamwiam在2005-3-7 18:59:00的发言：
在网上搜索了一下<I></I> OPA627BP~~~~~~~~
要五六十快一片~~~~~~晕........

这个前级就贵在这两个OPA和BUF。

iamwiam

在网上搜索了一下 OPA627BP~~~~~~~~
要五六十快一片~~~~~~晕........

qpzmg

我的于前几天算是全部完工，我是当前级用的，正在听着呢，嘿嘿……还不错，以后再改二房玩玩。机箱也用原来的SONY CD机改装好了。

wlm888

该前级板是我同事余生焊的，我只管出点子和淘元件，
小环牛是全新进口的，上面所有的电阻是威刹的，接线柱是德国产耐高稳的，小电解是ELNA的，小薄膜电容是飞利蒲的，
现在我还有四套，13588170910王利民，

HQ

Ｒ１０没改成３欧音量会细些。





http://www.hifidiy.net/dispbbs.asp?boardID=4&ID=8102&skin=0

深海潜水器

HQ老兄!推低阻32欧耳机R4上用多少K的电阻较好?钳子只给了我个51K的,还没配接线柱，结果是我把ＰＣＢ焊了个稀巴烂，还好把它搞响了，还有Ｒ１０没改成３欧有什么影响？

HQ

<img src="attachments/dvbbs/2005-3/200537181826182.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/2005-3/200537181826182.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2005-3/200537181844943.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/2005-3/200537181844943.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

iamwiam

能上个电路图吗??????????

holywen

不过我也没按这个图做过
<img src="attachments/dvbbs/2005-11/20051114114235323.gif" 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/2005-11/20051114114235323.gif\');}" onmousewheel="return imgzoom(this);" alt="" />
至于增加放大增益是否影响声音质量，这么顶级的OP，到10倍放大而已
应该不会影响声音质量的吧，应该可以从它的datasheet里面找到答案。

yq777

当作前级使用时，增加放大增益是否影响声音质量，偶想增益高一点

holywen

我接的是低阻的耳塞，sharp的mt770的MD上带来的，据说是mx500，深海赛而oem的，我以前买过一个mx500，对比听过，差别很小。
直接接MD，base开到2的感觉：低音很松，有弹性，这也是我对这个md最满意的地方了。
MD输出至论坛前级：立刻是感觉霍然开朗，声音十分清晰，轮郭分明，对比起来md的高音就显得柔弱很多，甚至感觉有点乱。低音有力，但是弹性不是很足了。
amoi dvd播放CD同轴输出至1541至论坛前级(用胆 tesla e88cc)：和MD输出至论坛前级差别不大，也是十分清晰，轮郭分明的声音，低音有力。但是高音方面似乎比
MD输出至论坛前级更加晶莹剔透一点。

holywen

还是从wlm888兄那里弄来的外壳，漂亮啊。
<img src="attachments/dvbbs/2005-11/2005111495556410.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/2005-11/2005111495556410.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
翻过来：
<img src="attachments/dvbbs/2005-11/2005111495635557.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/2005-11/2005111495635557.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
装好的样子
<img src="attachments/dvbbs/2005-11/20051114957479.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/2005-11/20051114957479.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
和论坛1541一起唱歌：
<img src="attachments/dvbbs/2005-11/2005111495737143.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/2005-11/2005111495737143.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
给1541的电感上焊了电阻脚以接地：
<img src="attachments/dvbbs/2005-11/20051114958565.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/2005-11/20051114958565.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

davis0286

C2 C3 C4 C5 的683是什么东西啊  R10是51欧还是51K呢

20100318

683是0.068uF；51R是51欧姆。

kql123

buf634t是什么电路？

qihang

来看看