EIAJ-1

EIAJ-1 Format Videotape

Home movies , Industrial & educational video production

EIAJ-1 was a standard for

, with portable units using smaller 5″ diameter reels.

Uses

The EIAJ-1 standard paved the way for consumer oriented non-professional analog video recording technology to become more affordable and widespread, with many businesses, schools, government agencies, hospitals, and even some consumers adopting the format in the early 1970s. Some of the first public-access television cable stations that started up around that time used EIAJ-1 equipment extensively, due to its portability, low cost, and versatility. The original Sony Portapak, model CV-2000, used a proprietary format, but was later superseded by an EIAJ-1 compatible version, the AV-3400.

Variations

When EIAJ-1 was standardized, no videocassette recorders had yet been introduced. One of the main drawbacks to the format was the need to carefully thread the end of the tape around the head drum, through a gap between the capstan and pinch roller, and around a variety of guides and tensioners. If the user made any errors in doing this, the machine would malfunction and the tape could become damaged. So, another version, EIAJ-2, was released later on that used a single-reel cartridge (with the take-up reel being built into the VTR) instead of an open take up reel. Otherwise, the recording specifications were exactly the same.

Successors

By 1971, Sony introduced the first successful videocassette system, the U-matic format. The U-Matic system offered many advantages over EIAJ-1, including color recording as standard, stereo sound, and automatic tape threading. However, EIAJ-1 equipment remained in use for some years as it was less expensive than U-Matic machines or tape, EIAJ-1 equipment was lighter and more compact, and portable battery operated EIAJ-1 machines with companion video cameras were already available (such as the AV-3400, mentioned above). It was not until the mid-1970s, that portable U-Matic machines and compatible portable color cameras were introduced.

Neither the EIAJ-1 nor the U-Matic format were ever used in a camcorder (one piece) camera recorder unit, because of the size and weight of the mechanism involved. The recorder and camera were always separate units, connected by a multi conductor cable (typically a CCJ cable). The advent of the camcorder did not occur until the introduction of smaller, lighter cassette formats, such as Betamax and VHS.

References

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External links

• Information & specifications on EIAJ-1
• DC Video 1/2 VTR page
• Video interchange change video history on EIAJ 1/2" Half Inch Open Reel Video Tape at the Wayback Machine (archived 12 October 2013)
• Information & specifications on Sony EIAJ-1
• Experimental Television Center - Panasonic 1/2" specs
• Experimental Television Center - Sony AV-3400 Portapak
• Sony CV Series Video information