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An unusual Oscilloscope phenomenon

Discussion in 'Hobby Electronics' started by David L. Jones, Jun 25, 2009.

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  1. Joerg

    Joerg Guest

    Oh, they aren't engineered in China, are they?


    That's what impressed me, getting the really long Phillips-head deck
    screws almost all the way into a 4 by 4 without chewing up the head is
    something I thought wasn't possible with one of those little things. The
    screws let of a loud squeal as they went in.

    There is one tool from Bosch I really love: My Bosch Bulldog rotary
    hammer. When I use it as a jackhammer it sure sends the stuff flying.
     
  2. Joerg

    Joerg Guest

    With a fresh can of Henkel Pattex glue the shims may never come out again.
     
  3. Joerg

    Joerg Guest


    Thanks, that sound like a great trick.

    I always do that :)

    Otherwise the top piece will ride up if there is some thread on the
    shaft inside of it.
     
  4. Joerg

    Joerg Guest

  5. Joerg

    Joerg Guest


    How do you wire up the LCD? Just the bare glass or did you find a trick
    to get into their blob chip?

    [...]
     
  6. atec 7 7

    atec 7 7 Guest

    a cake of hand sop works very well , stick the screw point in and they
    slip in like c... ahem :)
     
  7. krw

    krw Guest

    I think some of ours are. The UI is more Greek, maybe
    Japaneese-VCRese.
    I generally use pilot holes, but even then heads get stripped out.
    Stainless screws are really bad that way. I don't hear the squeak,
    though. The Impactor bangs 'em home and is rather noisy, itself.
    I have a Bosch hammer drill too, but have never used it. ;-) About
    half my new tools are Bosch (most of the rest are Dewalt or Delta/PC).
    I think I'll replace my Harbor Freight SLCS with a Bosch too.
     
  8. krw

    krw Guest

    Depending on the screws and use, liquid soap works better. Parafin
    can keep stain from penetrating. Soap washes away, though some can
    damage cheap screws.
    If that's the concern, the top piece should be drilled to the same
    size as the screw shank (perhaps a *little* smaller). The pilot hole
    should go the length of the screw, though in the bottom piece it
    should be the size of the thread bottoms. Pilot drills do this, with
    a countersink, to the right size all in one swell foop.
     
  9. krw

    krw Guest

    I was going to say opening paint cans, but beer tastes better. ;-)
     
  10. krw

    krw Guest

    The only thing I'd recommend is to buy it in one of their brick and
    mortar stores, where it can be easily returned. A couple of friends
    also bought one, after I recommended it, and one apparently had
    damaged slider bearings.
    I put their meters in my tool box (and hide the Flukes) in case
    someone decides to borrow one. I lost a Fluke-77 that way.
     
  11. Dennis

    Dennis Guest


    I bet you say that to all the boys/gals :)
     
  12. krw

    krw Guest

    Because the doctor said I couldn't drink beer anymore?
     
  13. Fred Abse

    Fred Abse Guest

    When I was a lad, we called that color "Nipple Pink"

    ;-)
     
  14. Dennis

    Dennis Guest

    Thats not very PC Fred. These days we don't have nipples we have pediatric
    sustenance dispensers.
     
  15. James Arthur

    James Arthur Guest

    Interesting. I was intrigued by this just last month and
    meant to look into it:

    Fein:
    www.4multimaster.com
     
  16. Joerg

    Joerg Guest

    Well, I got meeself a lass and married her so I can't say that never no
    more :)
     
  17. Joerg

    Joerg Guest


    Which loss method? It grew legs and walked away or pop ... *BAM* ...
    "Whoops, sorry, guess I must've left it on amps"?
     
  18. krw

    krw Guest

    Legs.
     
  19. I've seen the same (or similar) result with a higher bandwidth (300MHz)
    scope, so the vertical bandwidth limit has nothing to do with it. The
    TDS-220 is just the one I happened to have available at the time. I filmed
    some comment on this extra stuff but it didn't make the cut.

    Dave.
     
  20. ehsjr

    ehsjr Guest

    I wish I could get into the blob, just as a matter of
    interest. I doubt it would be work the effort, though.
    Displays don't cost that much to make it worthwhile.
    The simple hack is to just use the thing on the meter
    PC board - you can saw away what you don't need.
    The last one I hacked used the whole meter, minus the
    switching, just to monitor a supply voltage. There was plenty
    of room inside the supply cabinet so I just soldered leads
    to the input and did a little surgery on the front panel
    so yo could see the LCD. I had a little DC-DC converter
    that provided the 9V for the meter. The supply ramps the
    voltage up slowly between set points over time, and the built
    in meter provides a way to watch the progress without
    needing to connect an external meter each time.

    Ed
     
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