找到了一付老高阻耳机

秋雨

做功放在地下室找材料竟然找到了一付老高阻耳机。
    以前电话局用的长途台的交换机都是人工的，想要那里的长途电话要先要通长途台跟话务员讲清要那里的电话，然后话务员再用扦头与相应的线路接通。在一些老电影中有时能看到，一排话务员头畿耳机手拿扦头嘴里念念有词的在忙着接线哩。
    这就是那话务员畿的耳机。高阻抗的声音很头是做矿石机的佳品，那时可没少为它上树爬屋埋地线泼盐水的。只是它是单耳机另一边要用海棉了布带了包一下不然夹耳朵痛。下边的送话器是碳精的，用两付耳机串联起来接上干电池拉上铜丝就可以通电话了，后来用单线一边埋一根地线多加几节电池也可以通话。哈哈当时感到很神奇啊。
    改天再用它找找儿时的感觉，矿石是找不到了2AP9也不知能否找到。
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秋雨

直流电阻220欧，交流阻抗就不知了。

ntwhq

对于耳机和喇叭来说,阻抗比直流电阻大不了多少,一般情况下阻抗是直流电阻的1.1-1.2倍,所以你这个耳机算不得高阻耳机，不过还是能用来做矿石机，灵敏度要小一点。


[right]「该帖子被 ntwhq 在 2006-1-7 9:47:09 编辑过」[/right]

zhangyuanfei

本人打算高假购买这个“老高阻耳机”，不知可以不可以，如感兴趣与我联系。
我的电子邮件是：zyf101899@126.com,QQ是48142569

zhangyuanfei

本人打算高价购买这个“老高阻耳机”希望与我联系
我的手机是：13522071744
电子邮件是：zyf101899@126.com
QQ:48142569

秋雨

谢谢！这也是我的收藏品。不想卖，对不起！
你的QQ号我己记下并己加为好友，有机会联系，你可能也有很多收藏品吧？


[right]「该帖子被 秋雨 在 2006-3-31 19:25:21 编辑过」[/right]

zhangyuanfei

希望多联系

nanxun

贸易全球化，价值最大化

http://china.53trade.com?lms0402

yxs8732

俺单位一大筐这种耳机卖给了收破烂的.

尼摩船长

以下是引用 [B]yxs8732[/B] 在(2006-4-6 14:45:25)的发言：

俺单位一大筐这种耳机卖给了收破烂的.

快快快，再翻翻 ，还有我都要

fanjx

以下是引用 [B]yxs8732[/B] 在(2006-4-6 14:45:25)的发言：

俺单位一大筐这种耳机卖给了收破烂的.

拿到坛子里来卖吧！