| 摘要 |
PURPOSE:To eliminate the need for a short ring and to reduce the size of constitution by fitting two couples of magnetic heads in specific relation, and specifying the channel arrangement of a rotary transformer and short-circuiting channels selectively. CONSTITUTION:The two couples of heads 2a and 2b, and 3a and 3b which are different in track width and also different in azimuth angle between opposite heads are fitted to a rotary drum 1 which is wound with a magnetic tape 4 by >=180 deg. so that the head 2, etc., in one couple which has one azimuth angle and the head 3, etc., in the other couple which has a similar azimuth angle are not close to each other. Further, the channels of the rotary transformer consisting of couples of transmission coils 12a and 16a-13a and 17a corresponding to the respective heads are also arranged similarly and the unused channel formed of the couple of coils 12a and 16a is short-circuited by a transistor which turns on in response to a signal. Consequently, crosstalk is precluded without using any short ring to reduce the size of constitution and speed up the operation.
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