VIDEO AND AUDIO HEADS
VCRs record and playback audio and video signals using magnetic heads. At a maximum, all VCRs use the following magnetic heads:
- A stationary full-erase head
- A stationary audio head
- Rotating video heads
- A stationary control-track head
The way these heads record information on the tape is similar for the three formats, though the exact track widths and specifications vary. The recording formats for VHS, Beta, and 8 mm are shown in Fig. 33.17. The relative location of the heads in the three types of VCRs is shown in Fig. 33.18.
- Full-erase head: The full-erase head erases the entire tape and is on only during recording. The erase head blanks out any previous recording that might be on the tape. In some VCRs a secondary audio ...
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