我做的甲類功放.[參賽]

drb888

会不会发射和接收很多非音频信号？

似水流年

可否贴图看看(线路图)

homedou

此機的全部電路板為3MM厚的雙面板用刀刻而成.(在學校里條件艱苦),那時350元一個月的生活費.硬是讓我擠了1300元左右分次買零件買成.然後2月一回一次家的情況下分批從學校里帶回老家.(江西南昌到上饒),以至于每次回家時都要帶大包小包的零件回家.別人都以為我是做生意的人....呵呵...當年的苦.算了不說了.

LJZ8838

散热会不会太小

Biglee_163

k213/J76之类的MOS管在静态电流达到80ma以上时很容易引起高频自激。表现为静态电流不稳定（可以直接测量末级功率管的射级电阻测量）、中点电位不稳定。用示波器可以看到较明显的自激波形。

scorter

楼上老兄的机机<font color="#216d94" size="2">高音硬吗？欧的2sk213未加电容反馈。</font>

Biglee_163

<p>地线的排布与装不装机壳关系不大，裸奔也能达到好的效果</p>

scorter

[B]以下是引用[I]Biglee_163[/I]在2006-9-6 23:17:00的发言：[/B][BR]29楼，你的问题是地线没有处理好！

拜读了兄弟的超长贴，现在是没装机壳，这几天装到机壳里注意一下布线。

lusson

<p>30楼也在南昌上学的？？？</p><p>长运还好啦，不过不能跟广州那样的地方比。</p><p>没什么发烧的东东</p><p></p><p>这么老的贴也翻出来</p>

stwumb

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Biglee_163

29楼，你的问题是地线没有处理好！

bd5iw

长运是个好地方啊&nbsp; 想当年在南昌读书的时候 各个星期都去 ~~~~~~~~！！！

scorter

<p>掏到一套斯巴克拆机板（除电流放大），俺也正在做这个公房。不知是不是输入级电路的共模抑制比不好，离扬声器半米能听到交流声。末级用<font color="#216d94" size="2">SC2837/SA1186</font></p><p><font color="#216d94" size="2">声音的清晰度很好，低频控制力也不错，就是高音有点硬。希望和搂主交流。</font></p>

hengkong

<div class="quote"><b>以下是引用<i>homedou</i>在2005-9-21 15:41:00的发言：</b><br/>此機的推動用的是K389+J109.功放管是用了8對2SC5200+2SA1943功放管.現狀態還未調到甲類.正在已類老化狀態.更多我做的機請看我的網站.www.hbsdiy.com<br/><img src="attachments/dvbbs/2005-9/2005921153929987.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/2005-9/2005921153929987.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2005-9/2005921153940768.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/2005-9/2005921153940768.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2005-9/2005921153946509.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/2005-9/2005921153946509.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2005-9/2005921153951676.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/2005-9/2005921153951676.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/dvbbs/2005-9/2005921153959706.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/2005-9/2005921153959706.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></div><p>还是做甲乙类的好！还要看多少瓦甲类！散热片太小了，机子电流稍大都会“好牙烟”。而且这个散热片横向的冷却效果很差，要不就加风扇，要不就调5W以下甲类的就好。1943/5200这管子声音不错，我都很喜欢，就是买不到“飞兆”公司的正货。我有一个主动功放的线路想用这管子做电流放大级，只因找不到而放弃了。</p>

RockJam

厉害！呵呵

阿文

<p>在某年某月某日翻出来看，又想起自己做机的时候。</p>

homedou

<p>呵呵...好久的東東了.</p>

homedou

現在這機器都擺在老家生銹了.老家還有三四機器.一台FU50的推挽機.一台FU50單端機.還有一台TDA7293的機器.現在玩的東西是越來越退步了.

SAMLIU

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