page_title: Helical scan
hierarchical_section_title: Helical scan
caption_attribution_description: English: The rotating portion of a 6 channel rotary transformer used in a six-head ("4 head" Hi-Fi NTSC VHS) VCR, showing three of the six heads on the head drum.
context_page_description: Helical scan is a method of recording high-frequency signals on magnetic tape. It is used in open-reel video tape recorders, video cassette recorders, digital audio tape recorders, and some computer tape drives.
context_section_description: Helical scan is a method of recording high-frequency signals on magnetic tape. It is used in open-reel video tape recorders, video cassette recorders, digital audio tape recorders, and some computer tape drives.
caption: The rotating portion of the head drum showing the rotary transformer and three of the six tape heads used in this particular VCR
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