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发表于 2005-11-20 21:33:13
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实验矿石收音机参数:
中波波段。
圆纸管直径80mm,高100mm。漆包线线径为1mm,在圆纸管上绕60圈,配365pf空气可变电容器。检波二极管用2AP9,4000欧姆高阻抗耳机。
图中的空气双连可变、4个接线柱和2AP9由地老虎先生提供,致谢!
此线圈没有抽头,建议通过试验选择二极管接线圈抽头的位置,兼顾灵敏度和选择性。
<img src="attachments/94kk/2005112013315910.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
CTRL+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
CTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('attachments/94kk/2005112013315910.jpg');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/94kk/2005112013322010.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
CTRL+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
CTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('attachments/94kk/2005112013322010.jpg');}" onmousewheel="return imgzoom(this);" alt="" /> |
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