Old Calculator Museum Advertising & Documentation Archive
Digital Devices Advertisement
Digital Devices 613E-1015 Magnetostrictive Delay Like Advertisement
Electronics Magazine, Feb. 17, 1969
Unfortunately, there is not a lot of information available on Digital
Devices, Inc. The company specialized in the manufacture of
magnetostrictive delay lines, generally made-to-order for customers
for their specific needs, with varying lengths of delay, operating
mode, frequency, and optional interface electronics.
The particular delay line advertised has a storage capacity of approx. 30K-bits
circulating through the line at a frequency of 2MHz. At a small-quantity retail
price of about $300, or $0.01 per bit, this delay line was a very economical way
to store small amounts of data that does not require the random access capability and
fast access of types of memory like magnetic core. Delay line technology
is particularly suitable to devices that cyclically access data in a regular pattern, such as
refreshing a display.
A few of the calculators in the Old Calculator Museum's collection utilize
magnetostrictive delay lines manufactured by Digital Devices. The
SCM Cogito 240SR, Diehl
Combitron S, and Wyle Laboratories WS-02 all contain delay lines
manufactured by Digital Devices specifically made for the calculator
Digital Devices was acquired by conglomerate Tyco Laboratories of
Waltham, Massachusetts, in the spring of 1968.