Method and apparatus for magnetically recording and/or reproducing.

摘要

A magnetic recording and/or reproducing apparatus for recording and/or reproducing desired information signals on a first helical recording track (TRDG) composed of first recording format formed in a first effective recording width (ARDG) on a magnetic tape (TPDG) and also capable of at least reproducing a second helical recording track (TRAN) composed of second recording format formed in a second effective recording width (ARAN) which is narrower than said first effective recording width on the magnetic tape, wherein a drum diameter (d) for a drum (DR) mounting rotary heads (3A, 3B) for recording and reproducing said magnetic tape of said first recording format is selected to a bigger value than a standard drum diameter of said second recording format corresponding to said first and second effective recording widths. <IMAGE>