Magnetic-head unit including rotary and stationary transformer sections and amplifier arrangement

Claim 1

A magnetic-head unit comprising a frame (2) and a lower and an upper drum (3, 4; 25, 28), which together define a tape-guide surface at their periphery for guiding a magnetic tape, which upper drum includes upper and lower sides and between which lower and upper drum a rotary head disc (17, 30) is interposed, which head disc is capable of rotating about an axis of rotation (4a) and carries a plurality of magnetic heads (18), which are electrically connected to a transformer comprising a rotary transformer section (8,; 31; 35) and a stationary transformer section (10; 32; 36), the stationary transformer section being connected to an amplifier arrangement (16) which is surrounded by a shielding cover (14, 15; 34; 38), characterized in that the stationary transformer section (10; 32; 36) is arranged above the upper side of the upper drum (4; 29), a bridge construction (11; 33; 37) is provided which serves to secure the stationary transformer section to the frame (2) of the magnetic-head unit, the amplifier arrangement (16) is situated inside the shielding cover (14, 15; 34, 38) adjacent the stationary transformer section, and a dimension of the rotary and stationary transformer sections (8, 10; 31, 32; 35, 36), viewed in a radial direction from the axis of rotation (4a) of the head disc (17; 30), is such that a radial extent of said sections is greater than half the radial distance from said axis of rotation to, and said sections extend beyond, the tape-guide surface of the lower and the upper drum (3, 4; 25, 28).