仿Melody-SHW-1688线路的前机

123

制作情况：<br/>1、机壳使用红木茶道托盘，底版使用5mm铝板。<br/>2、放大部分按原电路图制作，个别电阻数值有所改动。<br/>3、电源部分根据现有元件自行设计，CL整流,正负240V供电。<br/>4、元气件固定在3.5mm厚的树脂绝缘板上，使用瓷元件支架固定电阻电容。<br/>5、灯丝直流供电。<br/>6、反馈电阻为R4=4.7K、R5=47K 、根据听感进行调整，主要调整R4，R5和R4的比值，比值大反馈量小，比值小反馈量大。<br/>7、关键的两个电容器：1、整流电容第一级使用SP -8u油侵。2、输出电容使用WE- 0.25u&nbsp;&nbsp;x 2油侵。<br/>测试情况：（ZQ4121型失真度测试仪、YB4242型示波器、XDIB型信号发生器）<br/>1、&nbsp;输出1V失真度0.2%（1Khz）<br/>2、&nbsp;频率响应20---200KHZ正负小于0.1db<br/>3、&nbsp;噪声，输入对地时（电位器调到最小），输出小于0.1毫伏，电位器调到最大时，输出小于0.2毫伏。<br/><br/>外观<br/>

仿Melody-SHW-1688线路的前机

<br/>内部<br/>

仿Melody-SHW-1688线路的前机

<br/>电源<br/>

仿Melody-SHW-1688线路的前机

<br/>放大<br/>

仿Melody-SHW-1688线路的前机

<br/>

仿Melody-SHW-1688线路的前机

<br/><br/><br/>

123

6Z4的灯丝和阴极在管内未接通,两只的灯丝是可以并联使用的,有条件还是双6.3V供电.

ae9188

感谢123兄的回复.

123

自装胆前机数台，这台机子是最为满意的，背景宁静、音乐感丰富、高低平衡、延伸很好；低频深沉、又有力度，空气感强烈；声场、层次感相当好，定位准确；听人声是一绝。

lianguo623

想仿制.

sjh327

123

请看本帖2楼,6楼图.想自己组装的话,电源部分还是我的电源图容易取材制作,价格较低.
或查看:http://www.hifidiy.net/dispbbs.asp?boardID=10&ID=19311&skin=0

ae9188

123兄,你能提供包括电源部分在内的完整的1688线路图吗?谢谢!!

123

100hz方波
<img src="attachments/dvbbs/2006-2/200629204524365.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/2006-2/200629204524365.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
1Khz方波
<img src="attachments/dvbbs/2006-2/200629204824498.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/2006-2/200629204824498.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
10Khz方波
<img src="attachments/dvbbs/2006-2/20062921313603.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/2006-2/20062921313603.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
100k
<img src="attachments/dvbbs/2006-2/200629214851954.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/2006-2/200629214851954.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
输出1V时失真波型
<img src="attachments/dvbbs/2006-2/200629215137306.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/2006-2/200629215137306.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

家家乐

真靓！要啥有啥！

色胆浪人

123

<img src="attachments/dvbbs/2006-2/20062895547308.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/2006-2/20062895547308.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

Julien

给予精华

123

kenny

123

<img src="attachments/dvbbs/2006-2/200627201619254.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/2006-2/200627201619254.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2006-2/20062720215693.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/2006-2/20062720215693.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2006-2/200627202432501.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/2006-2/200627202432501.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2006-2/200627204248704.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/2006-2/200627204248704.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

Julien

lianguo623

123

有R7时输出阻抗:33.2k
<img src="attachments/dvbbs/2006-2/20062289458209.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/2006-2/20062289458209.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
去掉R7时:49.7k
<img src="attachments/dvbbs/2006-2/20062289517220.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/2006-2/20062289517220.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

123

R7用不用,输出阻抗有所变化.但不是影响很大的.