Since the Digital Group used them for digital saturation recording, they used the bare drive, together with their own controller card. Phi-Deck drives are still available from Phi Technologies , although they are most commonly used for audio recording. The Phi-Deck was featured in the What's New column of BYTE magazine in April 1976. This is an electronically controlled variable speed digital cassette deck which can be adapted for use by the home computer experimenter. It is made by Triple I, a division of the Economy Company, PO Box 25308, Oklahoma City OK 73125.
Technology marches on.