开盘母带

名称：开盘母带

产地: 美国

年份：1949年

器材简介：

   1949年美国的马格奈可德（Magnecord）公司首先使立体声录音机商品化,各大唱片公司发行的7寸直径两轨7 1/2 IPS的开盘带，称之为“准母带”。磁带是氧化铁作磁性材料涂敷在醋酸盐带基上制成的。

    开盘录音带就是3种格式：1/4英寸，2轨，15 IPS（标准母带）、1/4英寸，2轨，7 1/2 IPS（准母带）以及1/4英寸的带宽，4轨，7 1/2 IPS。

开盘母带（英文版）

Name: open reel master record

Origin: United States

Year: 1949

Equipment introduction:

   The American Magnecord Co., Ltd. first made stereo recording machine  commercialize in 1949. The major record companies issued reel to reel record of 7 inch diameter two track 7 1 / 2 IPS, this was called as "reel to reel master record". The tape was made of acetate medium covered with iron oxide magnetic material.

   The tape has 3 formats: 1/4 inch, 2 gauge, 15 IPS (standard master record), 1/4 inch, 2 rail, 7 IPS 1/2 (master record) and 1/4 inch bandwidth, 4 tracks, 7 IPS.