1" Sony EV Format (1964)
Sony Introduced this format in 1964 with the release of the EV-200. It was the first "portable" machine intended for general use and most found their way into the educational and industrial marketplaces. The term "portable" back in the early 60's meant only that the machine had handles, and in no way was meant to imply that the machine was actually even close to being lightweight or compact. Most machines of this format weighed in at around 90 lbs or so. Of course, compared to Quadruplex, they were indeed "portable" for their day.
The format uses 1" tape and employs a 2 head helical scanning system. Maximum recording time is 1 hour with 2400 ft of tape on an 8 inch reel. Tape speed is 7.8 ips. The EV-200 was a monochrome machine only, but later models in the EV-200 and 300 series were color capable by use of an external color adapter.
A small tip off to the tape's format (though not 100% accurate) is that unlike most other 1" formats, the Sony reels did not use NAB style hubs, but rather the common star spindle design.
