第三次从做2A3耳放,为解决超声采用分体电源!!! 参赛

wlm888

第三次从做2A3耳放,为解决超声采用分体电源!!!  
大致介绍如下:
            
             用料:CHM  3K:300欧耳放牛/2A3电源牛,美国4H/350mA电感/自己用57的Z11片绕的
                  3.5H/120mA电感一对(双声道独立二级滤波),TCC  10000UF/6V电解(2A3灯丝
                  滤波,体积比RIFA的33000/10V还大,估计是超大电流的),思碧刻字120UF/350V
                  电解(第一级美国4H/350mA电感后滤波),思碧刻字30UF/450V一对(第二级自绕
                  3.5H/120mA电感后滤波),英国红牛改制的2A3灯丝牛,IR镀金20A桥堆一对(2A3
                  灯丝整流),国产镀金10脚(其中四脚大电流的供2A3灯丝用)航空插一对,台湾产
                  扁柄电源开关,全新美国军用5*12档选择开关(做音量电位器)
   
                  管子:俄罗斯镀金脚2A3/喜万年6SN7WGTA,喜万年5V4GT整流,

                  机壳:放大部分用雀仔的小铝壳,电源部分用国产拆机的铸铝壳开孔打磨喷散光银
                       自喷漆,

<img src="attachments/dvbbs/2005-10/2005101211525664.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/2005-10/2005101211525664.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

小钳子

电源部分采用最原始的开孔方法:先用2mm的钻头定位----用合适的钻头打一圈孔----将中间的挖掉--------用锉刀修平<img src="attachments/dvbbs/2005-10/2005101212165468.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/2005-10/2005101212165468.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
这是开好孔的图片,<img src="attachments/dvbbs/2005-10/20051012121630182.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/2005-10/20051012121630182.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
为了与放大部分的机箱配合,
电源部分机箱用砂纸打磨后喷散光银自喷漆,效果还不 错

<img src="attachments/dvbbs/2005-10/20051012121712875.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/2005-10/20051012121712875.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
因为CHM的牛2.5V灯丝给2A3直流供电电压太低(定制时没打算用直流)
用英国的22.5瓦EI红牛改制,因改制空间余量有限,特用英国18股直径0.3MM漆包线绞和在一起的纱包线绕制(取其柔软性,好穿线),改好后浸 漆

<img src="attachments/dvbbs/2005-10/20051012121819801.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/2005-10/20051012121819801.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
这是改造前的牛,
这是改造好的灯丝牛,
<img src="attachments/dvbbs/2005-10/2005101383216531.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/2005-10/2005101383216531.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
电源部分未焊时的图片<img src="attachments/dvbbs/2005-10/2005101383253599.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/2005-10/2005101383253599.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
昨晚二个小时的成果,
电源部分已完成95%(因环氧树脂用完了,一对3.5H/120mA的电感还没灌封
<img src="attachments/dvbbs/2005-10/2005101383328111.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/2005-10/2005101383328111.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

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