一、電唱機的唱頭是什么東西
電唱機的(de)唱(chang)頭是它的(de)關鍵(jian)設備之一,它直接影響黑膠唱(chang)片的(de)音(yin)色。唱(chang)頭里有磁(ci)(ci)鐵,有線(xian)圈,不論是磁(ci)(ci)鐵振(zhen)(zhen)動線(xian)圈固(gu)定、或是磁(ci)(ci)鐵固(gu)定線(xian)圈振(zhen)(zhen)動,都會因此而(er)切割磁(ci)(ci)力線(xian),產生電流(liu),而(er)此電流(liu)的(de)大(da)小是隨著音(yin)樂(le)訊號振(zhen)(zhen)動的(de)大(da)小發出的(de)。將這些電流(liu)轉換成電壓形(xing)式,輸入(ru)前(qian)級,再經過前(qian)級里一個RlAA等化線(xian)路還原,繼續(xu)進(jin)入(ru)訊號放大(da)部分,最后(hou)就(jiu)從喇叭(ba)發出音(yin)樂(le)了。
二、電唱機唱頭的種類都有哪些
電唱機的(de)(de)唱頭是將唱針的(de)(de)機械振(zhen)動轉變成電信號的(de)(de)換能(neng)(neng)器,它有多(duo)種換能(neng)(neng)方法,因此唱頭的(de)(de)類(lei)型也眾多(duo),主(zhu)要有以下幾種:
1、動鐵式
動(dong)鐵式唱頭(tou)在針桿(gan)尾(wei)端(duan)鑲有(you)(you)小塊(kuai)純鐵作振動(dong)子(zi),純鐵位置(zhi)處在磁路空氣隙(xi)中,當針尖(jian)在聲(sheng)槽紋路里(li)運行(xing)時,純鐵也在空氣隙(xi)中不停地(di)運動(dong),從而改變了(le)磁路內的(de)磁阻,使(shi)繞在磁鐵極靴(xue)上的(de)線圈產(chan)生感應電(dian)壓。動(dong)鐵式唱頭(tou)的(de)振動(dong)系統質地(di)輕盈(ying),機械(xie)阻抗能(neng)做得很(hen)小,有(you)(you)利于電(dian)聲(sheng)技術指標(biao)的(de)提高。
2、動磁式
動(dong)(dong)(dong)磁(ci)就(jiu)是活(huo)動(dong)(dong)(dong)磁(ci)石的意(yi)思,唱(chang)(chang)(chang)片轉動(dong)(dong)(dong)時(shi)帶動(dong)(dong)(dong)唱(chang)(chang)(chang)針(zhen)振(zhen)(zhen)動(dong)(dong)(dong),唱(chang)(chang)(chang)針(zhen)振(zhen)(zhen)動(dong)(dong)(dong)活(huo)動(dong)(dong)(dong)了針(zhen)桿,針(zhen)桿尾部安裝一(yi)顆(ke)小磁(ci)石,唱(chang)(chang)(chang)針(zhen)振(zhen)(zhen)動(dong)(dong)(dong)亦同時(shi)振(zhen)(zhen)動(dong)(dong)(dong)小磁(ci)石,而發聲線(xian)圈(quan)(quan)繞著(zhu)鈇(fu)芯(xin)受(shou)磁(ci)石振(zhen)(zhen)動(dong)(dong)(dong)干擾,因而感應出(chu)交流電信號而發聲,這就(jiu)是動(dong)(dong)(dong)磁(ci)唱(chang)(chang)(chang)頭(tou)的原理(li)。由于線(xian)圈(quan)(quan)及鈇(fu)芯(xin)固定(ding)在唱(chang)(chang)(chang)頭(tou)內,所(suo)以(yi)線(xian)圈(quan)(quan)可(ke)繞較(jiao)多(duo)而不(bu)受(shou)唱(chang)(chang)(chang)針(zhen)活(huo)動(dong)(dong)(dong)重量限制,因此動(dong)(dong)(dong)磁(ci)唱(chang)(chang)(chang)頭(tou)輸出(chu)較(jiao)大,約有1.5至4mv,而且唱(chang)(chang)(chang)針(zhen)和(he)線(xian)圈(quan)(quan)是分(fen)離的兩個個體,所(suo)以(yi)動(dong)(dong)(dong)磁(ci)唱(chang)(chang)(chang)頭(tou)多(duo)數設計是唱(chang)(chang)(chang)針(zhen)和(he)線(xian)圈(quan)(quan)可(ke)以(yi)分(fen)開,以(yi)便唱(chang)(chang)(chang)針(zhen)損(sun)耗后可(ke)以(yi)隨意(yi)更(geng)換(huan)。
3、動圈式
動(dong)(dong)(dong)圈(quan)(quan)(quan)(quan)唱頭(tou)(tou)即活動(dong)(dong)(dong)音圈(quan)(quan)(quan)(quan)之意,一如動(dong)(dong)(dong)磁(ci)頭(tou)(tou)的針(zhen)(zhen)尖及針(zhen)(zhen)桿(gan)結構,只是(shi)唱針(zhen)(zhen)尾(wei)不是(shi)安(an)裝磁(ci)石,而(er)是(shi)安(an)裝線(xian)圈(quan)(quan)(quan)(quan),而(er)針(zhen)(zhen)桿(gan)活動(dong)(dong)(dong)帶動(dong)(dong)(dong)線(xian)圈(quan)(quan)(quan)(quan),磁(ci)石就固定(ding)在線(xian)圈(quan)(quan)(quan)(quan)左(zuo)右,針(zhen)(zhen)桿(gan)帶動(dong)(dong)(dong)線(xian)圈(quan)(quan)(quan)(quan)而(er)受磁(ci)石感應線(xian)圈(quan)(quan)(quan)(quan)出交流電(dian)信(xin)號而(er)發(fa)聲(sheng),這就是(shi)動(dong)(dong)(dong)圈(quan)(quan)(quan)(quan)的原理。由于(yu)針(zhen)(zhen)桿(gan)的動(dong)(dong)(dong)能很小,線(xian)圈(quan)(quan)(quan)(quan)也只能用很經很細(xi)的線(xian)圈(quan)(quan)(quan)(quan),因此線(xian)圈(quan)(quan)(quan)(quan)感應交流電(dian)信(xin)號很小,只有0.15至0.4mv左(zuo)右。動(dong)(dong)(dong)圈(quan)(quan)(quan)(quan)唱頭(tou)(tou)由于(yu)發(fa)聲(sheng)線(xian)圈(quan)(quan)(quan)(quan)是(shi)直接感受振動(dong)(dong)(dong)而(er)發(fa)聲(sheng),所以很多人認為動(dong)(dong)(dong)圈(quan)(quan)(quan)(quan)唱頭(tou)(tou)聲(sheng)音較動(dong)(dong)(dong)磁(ci)唱頭(tou)(tou)好(hao)。
4、光電式
光電(dian)式唱(chang)頭(tou)的(de)針(zhen)桿上裝有一塊極其輕(qing)薄(bo)的(de)遮(zhe)光片,當針(zhen)尖(jian)在針(zhen)槽里運(yun)行(xing)時(shi),位于微型燈泡和光敏(min)器(qi)件之間的(de)遮(zhe)光片亦(yi)隨之不停地(di)運(yun)動,由于光通量的(de)變化而使光敏(min)器(qi)件輸出相應的(de)電(dian)信號。
5、陶瓷式
陶(tao)瓷式(shi)唱(chang)頭的(de)換能器(qi)用具有壓電效應的(de)陶(tao)瓷材料制成。該唱(chang)頭工藝簡單,價格不高,但所(suo)需針壓較大(da),對唱(chang)盤使用壽命不利。
三、電唱機唱頭通用嗎
不通用。
不同類型的電唱機唱(chang)(chang)(chang)頭(tou)輸出(chu)電(dian)壓有所不(bu)(bu)同,隨便使用(yong)不(bu)(bu)合適型號的唱(chang)(chang)(chang)頭(tou),可能會導(dao)致電(dian)路損壞,影響電(dian)唱(chang)(chang)(chang)機(ji)的使用(yong)。一般建(jian)議大家(jia)根據電(dian)唱(chang)(chang)(chang)機(ji)的型號選擇合適類型的唱(chang)(chang)(chang)頭(tou)。