真正的矿石

lksh

铜纸盆的小喇叭<img src="attachments/94kk/20065513283361.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/20065513283361.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

lksh

<img src="attachments/94kk/20065513292261.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/20065513292261.jpg');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/94kk/20065513293161.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/20065513293161.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

lksh

<img src="attachments/94kk/20065513301961.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/20065513301961.jpg');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/94kk/20065513302661.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/20065513302661.jpg');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/94kk/20065513303661.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/20065513303661.jpg');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/94kk/20065513304761.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/20065513304761.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

lksh

<img src="attachments/94kk/20065513312161.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/20065513312161.jpg');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/94kk/20065513313461.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/20065513313461.jpg');}" onmousewheel="return imgzoom(this);" alt="" /><img src="attachments/94kk/20065513314561.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/20065513314561.jpg');}" onmousewheel="return imgzoom(this);" alt="" />

landao3491la

有半导体性能的自然矿石有很多，但要用于检波，是有要求的，一它必须相对稳定，抗氧化要好一点，效率，检波效率是非常重要的，我用过的只有硅铁和方晶体硫铁矿，别的试过一些，都不行。效率不容易过关。

zqytb

簧片用什么材料？普通马口铁皮还是纯铁皮


[right]「该帖子被 zqytb 在 2006-5-9 0:25:19 编辑过」[/right]

lksh

舌簧用白铁皮及马口铁均可，最好做退火处理。

shzx123

我有几箱1958年的矿石标本,明天上图让大家过目.看哪种矿石可以用.大家来分享.

yuran331118

看不到图看不到图看不到图

jzm

又学到了，原来检波用的矿石是自己做的，哎呀矿石机真的是精华。有时间真的亲手玩玩看。还不知道天线到底要多高。

yellowyy

看看，什么东西，没图啊