Lenaerts Notebook 34 (18 Aug - 18 Jan 1962)
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Notebook kept by Ernest Lenaerts during his work on the LEO computer. Includes entries: NB34-001: Front cover
NB34-002: Commissioning engineers report, 30k core store
NB34-003: August 24 1961, measurements, timetable and costs of a journey to Northumberland via York
NB34-004: September 1 1961, journey [holiday] continues up into Scotland
NB34-005: September 4 1961, journey continues, returning south to Eastcote
NB34-006: To do list for home
NB34-007: Article on transistors, diagrams of transistors, testing transistors
NB34-008: September 18 1961, reporting on commissioning, overcoming engineers reluctance to report
NB34-009: Test programmes for compatibility, project requirements [Harrow/Farrow]
NB34-010: Printing, TRT request for monthly reports on on all sites
NB34-011: September 28 1961,[ expenses], system evaluation, limits of acceptance tests
NB34-012: Designing a juice [extractor] for [Galylord Hauser] recipes
NB34-013: Word games, description of paper chromatography plus diagrams (taken from Scientific American)
NB34-014: Paper chromatography continued
NB34-015: Paper chromatography cont. and applied to plant pigments
NB34-016: September 1961: paper chromatography cont., circuit diagrams using transistors
NB34-017: Circuit diagrams continued
NB34-018: [quiz answers], [number puzzle]
NB34-019: Dermatological and other medical problems, possibly related to stress
NB34-020: October 16 1961, LEO II/5 drum [storage], tests, alarms and synchronisation
NB34-021: October 17 1961,Ferranti maintenance visits [drum], tip to Bristol
NB34-022: October 17 1961 visit to [Hartree House] to check records on drum performance, acceptance tests
NB34-023: LEO II/5 and drum performance, [word and number puzzle]
NB34-024: Voltage spikes between computer readers and drum earth
NB34-025: October 20 1961, drum current measurements, notes on drum trouble at Hartree House
NB34-026: October 24 1961, drum problems cont., efficiency of time sharing machine
NB34-027: Number triangles, projection system for checking wiring
NB34-028: October 26 1961, drum on LEO II/5, some improvements, list of responsibilities of Field Research Manager
NB34-029: Need for clerical and fault analysis staff
NB34-030: Thoughts on information sharing with Operations, : flow of work for producing recommendations
NB34-031: [word and number puzzles], calculations
NB34-032: LEO II/5 - drum, frequency control and printer. Passing on chairmanship of Engineers meeting to smith.
NB34-033: November 4(?) 1961 longer term measurements of disturbances in the computers
NB34-034: Tape recorder suppliers
NB34-035: [word and number puzzles], geometrical problem
NB34-036: Circuit diagram, calculations, request for standards for paper
NB34-037: Circuit diagrams continued, requirements for fault logs
NB34-038: Problems with store on every 8th comp[utation], printer problems
NB34-039: Electronics engineers trade association, printed boards, solderless joints, [letter puzzles]
NB34-040: [slide projectors], reliability, acceptance trials
NB34-041: Maintenance meeting; fault reporting,
NB34-042: Interview new member of staff, training and work for existing staff, [quiz answers]
NB34-043: November 22 1961, sketch of desk lamp, printer and carbon copies
NB34-044: LEO III/1 effectiveness of contacts, pressure [letter and number puzzle]
NB34-045: Miss [Lewin]'s responsibilities, power system evaluation
NB34-046: Acceptance [testing] for LEO III, binary calculations
NB34-047: List of issues, address, [quiz answers]
NB34-048: [puzzles], diagram of [printer]
NB34-049: Visit LEO III/5 , changing LE 14 [connection]
NB34-050: December 3 1961 LEO II/5 problems arising from the LE14 change, tape recorder details
NB34-051: December 5 1961, [delivery] dates for LEO III 1 -6, LEO !1/7 temperatures in vault
NB34-51_a: December 5 1961,LE 14 at Hartree House, LEO II/7 install thermometers, remove bad contacts
NB34-052: Issues to discuss at Hartree House, job offer to David
NB34-053: December 8 1961, [letter puzzle], contact pressure measurements
NB34-054: December 11 1961, notes from meeting about Field Reporting
NB34-055: Testing 'add' and 'multiply' on LEO II/1, contact problems
NB34-056: New starter, AMR Gill, [number puzzles]
NB34-057: [puzzles], LEO II/1, drum problems, Ferranti to correct
NB34-058: List of names, list of pieces of music
NB34-059: Contacts, measuring paper thickness
NB34-060: Contact problems and contact pressure, temperature in store vault
NB34-061: Tape spooling, freq[uency] control
NB34-062: December 29 1961, transistor reports, fault reports on LEO II/1
NB34-063: January 1 1962, LE 14, testing changes in clock pulses and signal amplitude
NB34-064: Zener diodes, diagram of hall layout
NB34-065: Diagram for a larger hall [Lidley Hall ?]
NB34-066: Modifying a tape recorder to be a recording instrument, package contacts on Ampex Decks
NB34-067: LEO III/2 emitter, tape deck [Samas] Powers printer
NB34-068: Manual for Phillips recorder, print samples, LE 14s wrong anode leads
NB34-069: [measurements or photographs], [Herton ] meter readings
NB34-070: September 8 1962 (error for January 8 1962?), hardness of contact materials, diagrams [contacts]
NB34-071: More on contacts, numbers [significance unclear]
NB34-072: January 12 1962, two types of contact in LEO III/1, improving contacts, microscope photos
NB34-073: Maintenance records and training, spare printer [Samastronic]
NB34-074: Visit to Bristol [Wills], [Samas] Posers printer problems, Hartree house report on valves, drum, printer spacing
NB34-075: January 17 1962, investigation into store problems at Bristol, interfering [pulses]
NB34-076: January 17 1962, Bristol cont. methods for systematic testing
NB34-077: Bristol testing cont.
NB34-078: January 18 1962, valves at Hartree House, 'anarchy' or developments on LEO II/5, printer issues
NB34-079: Includes upside-down page, list of useful information, [travel expenses]
NB34-080: Upside-down page of expenses and inside back cover, [expenses]
NB34-081: Back cover
Date : 18th August 1961 to 18th January 1962Physical Description : 1 bound volume (81 pages), paper; manuscript Provenance : Archive References : CMLEO/EL/NB/34 , CCH LI 57 This exhibit has a reference ID of CH76457. Please quote this reference ID in any communication with the Centre for Computing History. |
 
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Copyright Ernest Lenaerts File Size: 102.79 MB
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