Jeff Duntemann's Contrapositive Diary Rotating Header Image

Odd Lots


  1. TRX says:

    The MakerArm may be what finally trips my “gottahavit” for a “3d printer.

    Conceptually, it’s not all that different from my X2 desktop CNC mill with a toolchanger. The idea of using the same basic setup for light assembly never occurred to me.

  2. Carrington Dixon says:

    The Library of Congress has some color photos from Czarist Russia that go back into the ‘teens. See

  3. TRX says:

    Yep; they have two different sets if I remember right. And don’t forget, where you can get lost for hours.

    They have a bunch of Civil War photos scanned in at ultra-high resolution from the original glass plates, snapshots people have donated, and a vast and growing dataset of information people have contributed to the photos; places, events, and the people in them.

    This shot is 150 years old, and is still probably my favorite on the whole site:

  4. zeph says:

    I believe Vernor Vinge came up with smart bullets in The Peace War, vintage 1984. For what it’s worth. Fun book.

    1. Excellent book, in fact, as was Marooned in Realtime. I haven’t read either in a long time; probably the 90s. My smart bullets have a sort of weak but very focused AI, and in the second chapter Peter Novilio has to outsmart a couple of them to survive.

    2. jic says:

      There were smart bullets in the 1984 movie *Runaway*, starring Tom Selleck and directed by Michael Crichton. Very worth watching, if also very dated.

      The XM25 has actually already been tested in combat: prototypes were used in Afghanistan in 2010.

  5. TRX says:

    Harry Harrison had smart bullets in one of the Stainless Steel Rat books, probably in thr 1960s…

  6. Jim Tubman says:

    Heathkit is back! My dad (VE5OA) build his original ham gear from Heathkits. (Sold to collectors by now, alas.)

    1. I’ve owned numerous Heath items in my 42 licensed years, including a lot of their test equipment as well as radios. I still have a Sixer and a Twoer in full working order, but have sold the rest of it for lack of space. Over the years I had a Comanche receiver, an HW-23 single bander, a Seneca transmitter (though I could never make it work correctly) a DX-60B and its VFO, and a few others. I restored a DX-20 and sold it 25 or 30 years ago.

      I also had some Knight units too, including the T-60 and R-150, which, alas, was a lousy receiver.

      1. William Meyer says:

        It is encouraging to see them reappear, though I have my doubts about Santa Cruz as a base. It is likely to keep the prices higher than they might have been in Benton Harbor.

        Particularly interesting that they are offering update kits for old heath products. I still have my IG-18 and my distortion analyzer. I think the heath power supply may have been lost in a move (or may still be in a box…)

  7. Larry Nelson says:

    Thanks for the photo link. Our lives are so easy and abundant compared to the youths of our parents.

Leave a Reply

Your email address will not be published. Required fields are marked *