Learning Event 7:
DESCRIBE THE PURPOSE AND USE OF VIDEO AND AUDIO TAPE HEADS (ERASE, RECORD, AND
PLAYBACK)
1.
Types of erase heads (video or audio).
a. Video erase head.
An electromagnetic head which usually spans the width
of the tape and has a wide gap between pole pieces.
The wide gap permits an
extended time of influence for clean erasing of the tape (fig 1-14).
Figure 1-14.
Video erase head
b. Audio erase head.
An electromagnetic head (fig 1-15) is constructed in
several configurations, and may cover the entire width of the tape or a small
portion. The active portion of the head is just wide enough (a few mils) to cover
the space for audio recording plus a guard band on each side of the audio track.
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