一、電唱機的唱頭是什么東西
電唱機的(de)(de)(de)唱(chang)頭(tou)是它的(de)(de)(de)關鍵設備之一(yi),它直接(jie)影(ying)響黑膠(jiao)唱(chang)片的(de)(de)(de)音色。唱(chang)頭(tou)里有(you)磁(ci)鐵(tie)(tie),有(you)線(xian)圈,不論是磁(ci)鐵(tie)(tie)振(zhen)動(dong)線(xian)圈固定、或是磁(ci)鐵(tie)(tie)固定線(xian)圈振(zhen)動(dong),都會因(yin)此(ci)而切割磁(ci)力線(xian),產生電(dian)流,而此(ci)電(dian)流的(de)(de)(de)大小(xiao)是隨著(zhu)音樂訊號振(zhen)動(dong)的(de)(de)(de)大小(xiao)發出(chu)(chu)的(de)(de)(de)。將這些(xie)電(dian)流轉換成電(dian)壓(ya)形式(shi),輸(shu)入前級,再經過前級里一(yi)個RlAA等化線(xian)路還(huan)原,繼續(xu)進(jin)入訊號放(fang)大部分,最后就從喇叭發出(chu)(chu)音樂了。
二、電唱機唱頭的種類都有哪些
電(dian)唱(chang)機的唱(chang)頭是將唱(chang)針的機械振動轉變(bian)成電(dian)信號的換(huan)能(neng)器,它(ta)有多種換(huan)能(neng)方法,因此唱(chang)頭的類型(xing)也眾多,主要有以下幾種:
1、動鐵式
動(dong)鐵(tie)式唱(chang)頭(tou)在(zai)針桿尾端鑲有小塊純(chun)鐵(tie)作振動(dong)子,純(chun)鐵(tie)位(wei)置處(chu)在(zai)磁(ci)路(lu)空氣(qi)隙中,當針尖在(zai)聲(sheng)槽(cao)紋路(lu)里運行時(shi),純(chun)鐵(tie)也(ye)在(zai)空氣(qi)隙中不停地運動(dong),從(cong)而改變(bian)了磁(ci)路(lu)內的磁(ci)阻,使(shi)繞(rao)在(zai)磁(ci)鐵(tie)極靴(xue)上(shang)的線(xian)圈產(chan)生(sheng)感應電壓(ya)。動(dong)鐵(tie)式唱(chang)頭(tou)的振動(dong)系統質地輕(qing)盈,機械阻抗能做得很小,有利(li)于電聲(sheng)技(ji)術指標(biao)的提(ti)高。
2、動磁式
動(dong)(dong)磁(ci)(ci)就(jiu)是活動(dong)(dong)磁(ci)(ci)石的(de)意思,唱(chang)(chang)(chang)片轉動(dong)(dong)時(shi)帶(dai)動(dong)(dong)唱(chang)(chang)(chang)針(zhen)(zhen)振動(dong)(dong),唱(chang)(chang)(chang)針(zhen)(zhen)振動(dong)(dong)活動(dong)(dong)了針(zhen)(zhen)桿,針(zhen)(zhen)桿尾部安(an)裝一顆小磁(ci)(ci)石,唱(chang)(chang)(chang)針(zhen)(zhen)振動(dong)(dong)亦(yi)同時(shi)振動(dong)(dong)小磁(ci)(ci)石,而(er)(er)發(fa)聲線(xian)(xian)圈繞(rao)(rao)著鈇芯(xin)受磁(ci)(ci)石振動(dong)(dong)干擾,因而(er)(er)感應出交流電信號(hao)而(er)(er)發(fa)聲,這就(jiu)是動(dong)(dong)磁(ci)(ci)唱(chang)(chang)(chang)頭(tou)的(de)原理。由于(yu)線(xian)(xian)圈及(ji)鈇芯(xin)固定在唱(chang)(chang)(chang)頭(tou)內,所(suo)以(yi)(yi)線(xian)(xian)圈可繞(rao)(rao)較多(duo)而(er)(er)不(bu)受唱(chang)(chang)(chang)針(zhen)(zhen)活動(dong)(dong)重量限(xian)制,因此動(dong)(dong)磁(ci)(ci)唱(chang)(chang)(chang)頭(tou)輸出較大,約有(you)1.5至4mv,而(er)(er)且唱(chang)(chang)(chang)針(zhen)(zhen)和(he)(he)線(xian)(xian)圈是分離的(de)兩個(ge)個(ge)體,所(suo)以(yi)(yi)動(dong)(dong)磁(ci)(ci)唱(chang)(chang)(chang)頭(tou)多(duo)數設(she)計(ji)是唱(chang)(chang)(chang)針(zhen)(zhen)和(he)(he)線(xian)(xian)圈可以(yi)(yi)分開,以(yi)(yi)便(bian)唱(chang)(chang)(chang)針(zhen)(zhen)損耗后(hou)可以(yi)(yi)隨意更(geng)換。
3、動圈式
動(dong)(dong)(dong)(dong)圈唱頭(tou)即活動(dong)(dong)(dong)(dong)音圈之意,一如動(dong)(dong)(dong)(dong)磁頭(tou)的(de)針(zhen)(zhen)尖(jian)及(ji)針(zhen)(zhen)桿結構,只(zhi)(zhi)是唱針(zhen)(zhen)尾不是安(an)裝磁石(shi),而是安(an)裝線(xian)圈,而針(zhen)(zhen)桿活動(dong)(dong)(dong)(dong)帶動(dong)(dong)(dong)(dong)線(xian)圈,磁石(shi)就固定在線(xian)圈左(zuo)右,針(zhen)(zhen)桿帶動(dong)(dong)(dong)(dong)線(xian)圈而受(shou)磁石(shi)感應線(xian)圈出交流電信(xin)(xin)號(hao)而發聲,這就是動(dong)(dong)(dong)(dong)圈的(de)原理。由(you)于針(zhen)(zhen)桿的(de)動(dong)(dong)(dong)(dong)能很(hen)(hen)小(xiao),線(xian)圈也只(zhi)(zhi)能用很(hen)(hen)經(jing)很(hen)(hen)細的(de)線(xian)圈,因(yin)此線(xian)圈感應交流電信(xin)(xin)號(hao)很(hen)(hen)小(xiao),只(zhi)(zhi)有0.15至0.4mv左(zuo)右。動(dong)(dong)(dong)(dong)圈唱頭(tou)由(you)于發聲線(xian)圈是直接感受(shou)振動(dong)(dong)(dong)(dong)而發聲,所以很(hen)(hen)多(duo)人認為動(dong)(dong)(dong)(dong)圈唱頭(tou)聲音較動(dong)(dong)(dong)(dong)磁唱頭(tou)好。
4、光電式
光電(dian)(dian)式唱頭的針(zhen)桿上裝(zhuang)有一(yi)塊(kuai)極其輕薄的遮光片(pian),當針(zhen)尖(jian)在針(zhen)槽里(li)運(yun)行時,位于微型燈泡和光敏(min)器件(jian)之間(jian)的遮光片(pian)亦隨(sui)之不(bu)停地(di)運(yun)動,由于光通量(liang)的變化而使(shi)光敏(min)器件(jian)輸(shu)出相應的電(dian)(dian)信號。
5、陶瓷式
陶瓷式唱頭的換能器用具有壓(ya)電效(xiao)應的陶瓷材(cai)料制成(cheng)。該唱頭工藝簡單(dan),價格不高(gao),但所需針壓(ya)較大,對唱盤使(shi)用壽(shou)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)頭(tou)輸出電(dian)(dian)壓有所不同,隨便(bian)使用不合(he)(he)適型號的(de)唱(chang)頭(tou),可能會導(dao)致(zhi)電(dian)(dian)路損(sun)壞,影響(xiang)電(dian)(dian)唱(chang)機(ji)的(de)使用。一般(ban)建議大家根據電(dian)(dian)唱(chang)機(ji)的(de)型號選擇合(he)(he)適類(lei)型的(de)唱(chang)頭(tou)。