Most systems operate with an air bearing separating the heads from the surface of the tape.
Slow-scan television | retinal scan | slow-scan television | Scan | Manual Scan | Horizontal scan rate | Helical scan | helical scan |
1/4 inch Akai is a portable Helical scan EIA and CCIR analog recording VTR.
VK is a helical scan analog recording videocassette format developed by Akai in the late 1970s, that is capable of recording and playing back black & white (and later color) video in either EIA (aka RS-170, the 525-line NTSC video standard for North America, Canada, Mexico, & Japan) and CCIR (the 625-line PAL video standard for Europe and other parts of the world).