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The Teletype Model 28

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    Volumes

    1. Vol 1 The Teletype Model 28 — Vol 1: A Printer Built for a Hundred Words a Minute Teletype set out to build a page printer that ran at 100 words a minute with less upkeep than its old machines needed at 60, that was quieter and lighter, and that kept working on a rolling ship. The result was the Model 28. It went to the armed forces in the Korean War and stayed in Navy, Bell System and amateur service into the 1980s.
    2. Vol 2 The Teletype Model 28 — Vol 2: Inside the Typing Unit A 28 typing unit has a constantly turning shaft, six clutches that each turn only when told to, nine code bars, and a type box the size of a pack of gum that is pushed to one of sixty-four positions under a single hammer. This volume goes through it unit by unit, from Teletype's own 1953 theory of operation.
    3. Vol 3 The Teletype Model 28 — Vol 3: The Family, and How to Tell What You Are Looking At Teletype built the 28 from separate units, so a 28 is really a combination: a typing unit on a keyboard or base, a motor, an electrical service unit, perhaps a punch and a reader, in one of a dozen cabinets. This volume names the units, the sets they make, and the plates that tell you which one you have.
    4. Vol 4 The Teletype Model 28 — Vol 4: Tape on the 28 — Punches, Readers and the ASR The 28 family includes four kinds of tape punch, a set of transmitter-distributors, reperforator-transmitters for relay centres, and the ASR that combines them with a page printer. This volume covers what each one does, how the ASR's mode switch routes the signal, and how tape from a 28 gets in and out of a computer.
    5. Vol 5 The Teletype Model 28 — Vol 5: Oil, Grease and Cleaning Teletype's lubrication sections say exactly where each drop goes, how often, and which two lubricants to use. The lubricants have been out of production for decades. This volume covers the schedule, the modern equivalents that have been worked out, how restorers clean a 28 without harming it, and the motor, which needs care of its own.
    6. Vol 6 The Teletype Model 28 — Vol 6: Adjustment, Range and Repair The 28's adjustment sections run to hundreds of pages, but a working machine needs only a few dozen of those adjustments checked, and the Bell System listed which ones. This volume covers that shortlist, how to take and read a range, the faults that surplus 28s actually develop, the tools and parts, and where the help is, starting with RTTY.COM.
    7. Vol 7 The Teletype Model 28 — Vol 7: Buying and Moving One Today Model 28s still turn up, often for less than a good typewriter and sometimes for nothing. The cost comes afterwards: the weight, the missing parts, and the speed gears it arrived with. This volume covers what is out there, what it costs, what to check, how to move it, which version suits which job, and how to change its speed.
    8. Vol 8 The Teletype Model 28 — Vol 8: Wiring a 28, and the 28-or-15 Decision A 28 accepts a 20 or 60 mA neutral loop, or a polar line through a relay, depending on how its electrical service unit is strapped, and some military 28s accept neither. This volume covers what is specific to wiring a 28, how one can print the news again from RTTY.COM's ITTY streams, how it compares with the Model 15, and how a pair of them could serve a PURPLE cipher machine replica.