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Mercury delay line tube, short

A short tube from a mercury delay line used on LEO I.

LEO I used delay line memory, a technology developed through radar research during WWII. Data would be continuously pulsed through these mercury-filled tubes until required by the machine. The length of the delay tube dictated the amount of information that could be stored - this tube was 17 bits. LEO I had a total of 2kB of memory.

This delay line tube is currently on display in the main gallery as part of our LEO exhibition for the National Lottery Heritage Funded-project 'Swiss Rolls, Tea and the Electronic Office'.

Manufacturer: LEO
Date: c1950s

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Other Systems Related To Mercury delay line tube, short:

Item Manufacturer Date
Leo II Valve Rack LEO Computers LTD June 1959
Leo III Logic Board LEO Computers LTD early 1960s
Program Wiring Subset Unit from LEO III LEO Computers Ltd c1965

This exhibit has a reference ID of CH54363. Please quote this reference ID in any communication with the Centre for Computing History.


Mercury delay line tube, short

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