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  1. #21
    Steve Smith's Avatar
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    But surely as it's AC, we are only talking about one cycle worth of time?


    Steve.
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  2. #22
    polyglot's Avatar
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    Depends on Q.

    My understanding is that the regulatory behaviour is from saturation (i.e. the core is grossly undersized) and that the extra resonant winding exists just to reduce additional harmonic content, i.e. prevent it producing just square waves. So the quantity of energy stored by the resonant coil would represent probably a cycle or two's worth at nominal load. But it could well be many cycles, depending on the damping factor of that resonant system.

  3. #23
    Ken Nadvornick's Avatar
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    A Zone VI Compensating Enlarging Timer paired with a Zone VI Compensating Developing Timer.

    Test strips and prints are freaking identical. Every single time. Even weekends apart, if I use fresh developer from the same batch.

    So consistent it's unnerving.

    For perspective, I've even run tests on the developing timer, varying a water bath by 0.1F against my standard mercury thermometer. Moving between 67.9F — 68.0F — 68.1F I've observed the addition or subtraction of ~2 seconds per minute. Rezero and it goes away. Move in the opposite direction and it follows exactly as expected. Back and forth. Consistent as hell.

    If the tones are wrong, I can't point fingers. I know it's my fault every time.

    I would expect RH Designs more modern hardware might be even better.

    Ken
    "When making a portrait, my approach is quite the same as when I am portraying a rock. I do not wish to impose my personality upon the sitter, but, keeping myself open to receive reactions from his own special ego, record this with nothing added: except of course when I am working professionally, when money enters in,—then for a price, I become a liar..."

    — Edward Weston, Daybooks, Vol. II, February 2, 1932

  4. #24
    ic-racer's Avatar
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    Another inexpensive solution is a second-hand baseboard color meter. I got a free Melico color meter a while back. The 'white' channel nulls with a good sized wide swinging needle that is easy to read and center.

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