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  1. Thread: Adjustable DC 1800

    by gar
    Replies
    22$$
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    885

    181013-1107 EDT GoldDigger: Your Datsun...

    181013-1107 EDT

    GoldDigger:

    Your Datsun system is interesting. This could have been a design to try to get around the contact life problem of an oscillating relay.

    Some wild guesses....
  2. Thread: Adjustable DC 1800

    by gar
    Replies
    22$$
    Views
    885

    181012-2137 EDT GoldDigger: Ohm used a...

    181012-2137 EDT

    GoldDigger:

    Ohm used a stack of thermocouples, and varied the temperature.

    .
  3. Thread: Adjustable DC 1800

    by gar
    Replies
    22$$
    Views
    885

    181012-2056 EDT GoldDigger: By at least...

    181012-2056 EDT

    GoldDigger:

    By at least 1940 Ford, probably not as early as 1936, was manufacturing a voltage regulator assembly that consisted of three relays. A voltage regulating relay, a...
  4. Thread: Adjustable DC 1800

    by gar
    Replies
    22$$
    Views
    885

    181012-2016 EDT Larry Fine: In 1800 little...

    181012-2016 EDT

    Larry Fine:

    In 1800 little was known about resistance, resistors, conductance, current, or what was, or how did electricity function. Thus, not much was known on how to generate...
  5. Thread: Adjustable DC 1800

    by gar
    Replies
    22$$
    Views
    885

    181011-1006 EDT In the early 1800s little was...

    181011-1006 EDT

    In the early 1800s little was known about resistance. There were no alloys for making high resistance resistors. There were no variable wirewound resistors with a sliding contact....
  6. Thread: Adjustable DC 1800

    by gar
    Replies
    22$$
    Views
    885

    181011-0759 EDT A little study of electrical...

    181011-0759 EDT

    A little study of electrical history shows that the above mentioned items did not exist.

    Some references:
    https://en.wikipedia.org/wiki/Electricity...
  7. Thread: Adjustable DC 1800

    by gar
    Replies
    22$$
    Views
    885

    Adjustable DC 1800

    181010-2438 EDT

    If you needed a continuously variable DC voltage supply to run experiments in the early 1800s what would you use to perform this function?

    .
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