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Show us your junk!

neuromodulator

I love junk, specially when it can be fully restored, has interesting parts or uses interesting technology. Most of the junk I get, comes from the university, its dumped because its either too old or it doesn't work anymore. I'll start this thread by showing one of my latest junk acquisitions:

 

imageimageimage

 

 

This is an autotransformer made by a company called "The Superior Electric Co" from Bristol, Connecticut. It was apparently build in the 60s (according to what I found in the net) and supports a max of 1.2 kva. The autotransformer works as expected but of course it shows its age, the rubber cable is not in the best condition and so isn't its paint. In the future I may repaint it and replace the cable but for now its good enough as it is.

 

Have you also found nice junk? Show us!

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  • The Cray Super computer was developed here in Chippewa Falls. Somewhere along the way I picked up this section of core memory from an early Cray machine. I would guess that it was in the middle to late 1960s. At the time they were still using discrete transistors in their circuits. There are 1024 bits in each of the 4 quadrants so this would be the equivalent of a 4 kb memory chip. My how things have gotten smaller.

     

    image

     

    John

  • in reply to jw0752

    John if I am not wrong, this technology was hand-made.

  • in reply to ntewinkel

    "wiring up 50k bits of core should keep someone busy for a little while! image"

     

    Perhaps time to upcycle that old weaving loom ?  image

  • in reply to genebren

      wrote:

    > 50K cores is only 6.25K bytes of memory (without parity checking), so if someone wants core memory someone needs to get busy.image

     

    Makes me appreciate these 32GB SD cards that much more! (amazing that they are only about $5 now!)

  • in reply to beacon_dave

    Would hate to snap a wire or make a mistake mid-weaving ...

     

    - Gough

  • in reply to clem57

    Talking about the woven memory cores, I literally just saw a video by Youtubers, Linus Tech Tips and Smarter Every Day. They have a look at some of the memory cores from the Saturn V rockets. Very interesting for someone like me who has never seen anything like it.




  • in reply to cstanton

    I could not do this looking at the kit . My eyes are not what they used to beimage...

    But if someone was willing to build, I could enjoy the results.imageimage

  • in reply to Jan Cumps

    "Yes! I didn't see it there, but it's the same project of the same guy."

     

    Perhaps you saw it here :

    Flipping Core Memory Bits Directly With a Magnetic Stylus

  • in reply to e14phil

    Very interesting and educations. Things already known but it's nice to see all together, well explained and applied to a great challenge image

     

    Enrico

  • in reply to beacon_dave

    link helps a lot in performing the practical.

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