Updates

What is new to read here, newest first. Not the same thing as the restoration log, which is what happened at the bench — this is what has been added to the site. New pages are listed automatically; corrections worth knowing about are written down by hand. Figure redraws and typo fixes are not news and are not here. Atom feed.

1. 2026-09-11New

   Maintenance manual supplement (OMM-1002E) — 2 new pages

   • Major Component Replacement Procedures
   • Troubleshooting

2. 2026-09-10New

   Five decibels hot at 10 kHz

   • Five decibels hot at 10 kHz

3. 2026-09-10Updated

   Five decibels hot at 10 kHz

   Corrected: this was the first alignment since the recap, not the first ever.

   • Five decibels hot at 10 kHz

4. 2026-09-09New

   Maintenance manual supplement (OMM-1002E) — 4 new pages

   • Front Matter
   • General Information
   • Performance Tests and Electronic Alignment
   • Tape Transport Maintenance

5. 2026-09-08New

   Instruction and preventive maintenance manual (OIM-1004E) — 2 new pages

   • Installation
   • Operation

6. 2026-09-07New

   Instruction and preventive maintenance manual (OIM-1004E) — 4 new pages

   • Front Matter
   • General Information
   • Preventive Maintenance and Adjustment
   • Schematics

7. 2026-09-07New

   MX-5050BII: the one people mean when they say MkII

   • MX-5050BII: the one people mean when they say MkII

8. 2026-09-06New

   The announcer was slow

   • The announcer was slow

9. 2026-09-06New

   The meters mean something now

   • The meters mean something now

10. 2026-09-06New

    The reference tapes, at the right speed

    • The reference tapes, at the right speed

11. 2026-09-04New

    Mark II: the desk-top first generation

    • Mark II: the desk-top first generation

12. 2026-09-04New

    MX-5050-8 / 8D: the half-inch eight-track

    • MX-5050-8 / 8D: the half-inch eight-track

13. 2026-09-04New

    MX-5050B: the plain B

    • MX-5050B: the plain B

14. 2026-09-04New

    QX / QXD / QXHD: the quarter-inch four-channel

    • QX / QXD / QXHD: the quarter-inch four-channel

15. 2026-08-16New

    Operation manual (OIM-1005E) — 5 new pages

    • Front Matter
    • General Information
    • Installation
    • Operation
    • Preventive Maintenance and Adjustments

16. 2026-08-16New

    The operation manual surfaces

    • The operation manual surfaces

17. 2026-08-14New

    The reference tapes arrive

    • The reference tapes arrive

18. 2026-08-11New

    Sales brochure — Compact Professional Recorder (S-117A, April 1978) — 5 new pages

    • Cover & Introduction
    • Features in Detail
    • Mounting Configurations & Ordering
    • Production Features
    • Specifications

19. 2026-08-11New

    Sales brochure — Compact Professional Tape Recorder (B-103A, September 1975) — 4 new pages

    • Cover & The Sensible Alternative
    • Features in Detail
    • Performance Specifications
    • Production Features

20. 2026-08-11New

    The first brochure: Specification Sheet S-111

    • The first brochure: Specification Sheet S-111

21. 2026-08-11New

    The other two brochures

    • The other two brochures

22. 2026-08-10New

    Specification Sheet S-111 (August 1976) — 4 new pages

    • Electronics
    • Introduction & Features
    • Physical & Price
    • Transport

23. 2026-07-24New

    Paper arrives

    • Paper arrives

24. 2026-07-24New

    Recap complete

    • Recap complete

25. 2026-07-17New

    Choosing the audio capacitors

    • Choosing the audio capacitors

26. 2026-07-17New

    The playback-first recap: a bench guide

    • The playback-first recap: a bench guide

27. 2026-07-15New

    The eight parts that keep the switches alive

    • The eight parts that keep the switches alive

28. 2026-07-12New

    Annual Equipment Directory: the Otari listings

    • Annual Equipment Directory: the Otari listings

29. 2026-07-12New

    Full professional performance and features in a compact package — Otari MX-5050

    • Full professional performance and features in a compact package — Otari MX-5050

30. 2026-07-12New

    Three new professional recorders from Otari

    • Three new professional recorders from Otari

31. 2026-07-11New

    9 outstanding reasons why you should choose Otari

    • 9 outstanding reasons why you should choose Otari

32. 2026-07-10New

    Equipment Profile: Otari MX-5050-2SH

    • Equipment Profile: Otari MX-5050-2SH

33. 2026-07-10New

    Front Matter

    • Front Matter

34. 2026-07-10New

    Mini-Pro! Little brother to the MX-7000 — the MX-5050

    • Mini-Pro! Little brother to the MX-7000 — the MX-5050

35. 2026-07-10New

    Otari listings

    • Otari listings

36. 2026-07-10New

    Otari MX-5050 Professional Series Two-Speed Tape Recorder

    • Otari MX-5050 Professional Series Two-Speed Tape Recorder

37. 2026-07-10New

    Otari Will Adapt Retailing Modes

    • Otari Will Adapt Retailing Modes

38. 2026-07-10New

    Service training binder — 6 new pages

    • Basic Technical Concepts for Tape Recorders
    • Connector Cross-Reference
    • Interfaces, Error Codes & Workshop Form
    • Guide to Part Number Prefix Letters
    • Parts Cross-Reference Lists
    • Workshop Slides — Recording Theory

39. 2026-07-10New

    Survey: Studio Mastering Machines — the Otari entries

    • Survey: Studio Mastering Machines — the Otari entries

40. 2026-07-09New

    Inside the transport buttons

    • Inside the transport buttons

41. 2026-07-09New

    Maintenance manual (2S, 4S, 2SD & 4SD) — 6 new pages

    • Major Component Replacement Procedures
    • General Information
    • Parts Lists and Schematics
    • Performance Tests and Electronic Alignment
    • Tape Transport Maintenance
    • Troubleshooting

42. 2026-07-09New

    New Products: the Otari MX-5050

    • New Products: the Otari MX-5050

43. 2026-07-08New

    Finding the schematic

    • Finding the schematic

44. 2026-07-08New

    Listed as broken. The adventure begins.

    • Listed as broken. The adventure begins.

45. 2026-07-08New

    No dummy plug — no problem!

    • No dummy plug — no problem!

46. 2026-07-08New

    Re-capping the motor run caps

    • Re-capping the motor run caps