Heathkit

ES-400 Analog Computer

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    Volumes

    1. Vol 1 Overview & history What the machine is, how it came to exist, what it contains, and where each topic is treated in Vols 2–8
    2. Vol 2 Hardware & architecture Sub-assembly inventory, power rails, vacuum-tube op-amp topology, and schematic walk-through — failure triage deferred to Vol 4
    3. Vol 3 Computing elements & patchbay Operational amplifier theory, integrator mechanics, patch-field topology, and coefficient scaling — bridges Vol 2 (power) and Vol 4 (problem setup)
    4. Vol 4 Acquisition & restoration Finding, inspecting, recapping, retubing, and bringing up a surviving ES-400 — companion to Vols 1–3 (architecture, programming, applications)
    5. Vol 5 Programming Scaling, patching, and reading results — the complete operator workflow for turning differential equations into wired solutions on the ES-400
    6. Vol 6 Sample programs & demonstrations Six worked demonstrations from grade-school integrator to college-depth damped oscillator, predator-prey, and projectile — each with scaling derivation, patch diagram, pot-setting table, and expected waveform
    7. Vol 7 Modern extensions & interfacing Solid-state substitution, data-logging, bench-supply alternatives, patch hardware, and reversibility discipline — bridging 1956 vacuum-tube design to modern instrumentation
    8. Vol 8 Cheatsheet (field-grade) Condensed field reference for bench work, patching, and restoration — distilled from Vols 1–7

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