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ballantine 1010a oscilloscope

Discussion in 'Electronic Basics' started by Mike, Sep 4, 2005.

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  1. Mike

    Mike Guest

    Hello,

    I picked up a Ballantine 1010A this morning at a reasonable price. It
    appears to be functional, but the only problem is that the horizontal sweep
    trace is slanted on the screen, rising to the right. Is there a mechanical
    adjustment required? Would anyone have a manual on this scope?

    Thanks for the help.
    Mike
     
  2. Bob Masta

    Bob Masta Guest

    Do't know anything about your particular scope, but in general
    there should be a "trace rotation" trimpot on the front panel...
    often just a little hole for you to poke a small screwdriver through.
    I suppose that on less expensive scopes, you might have to manually
    rotate the CRT. Use caution! You would want to have the trace
    running to see when it is level, so spend some time first just
    studying the layout to see how to do that safely. I'd guess there
    should be some clamps you can loosen with the power off,
    rotate carefully with power on, and tighten again with power off.
    And do note that there may be a residual charge on power-off,
    though not as bad as a TV it could still be dangerous.

    Also, however you end up doing the adjustment, you will
    want to do it with the scope in the same compass orientation
    as you will actually be using it on your bench.

    Best regards,


    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
    Home of DaqGen, the FREEWARE signal generator
     
  3. Mike

    Mike Guest

    Thanks, Bob... I'll check that out today and let you know how I made out.

    Mike
     
  4. Mike

    Mike Guest

    I checked the oscilloscope for a small adjustment screw on the cover. The
    only thing I found was a "cal" screw that only changes the vertical
    displacement of the trace. Turns out I will need to open the case.

    Before I do that, how can I safely handle a CRT with power on? Just don't
    touch the terminals?

    Thanks.
     
  5. Bob Masta

    Bob Masta Guest

    Without seeing this unit, I would be hesitant to make any
    definite safety recommendations. I think you should be
    OK if you are just touching the glass envelope, but my
    inclination would be to look for a way to do this by poking
    with a wooden or plastic stick.

    Best regards,


    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
    Home of DaqGen, the FREEWARE signal generator
     
  6. Bob Masta

    Bob Masta Guest

    Mike, I just checked out an old Heathkit construction manual to see
    how it was done during final calibration. They say to note the angle
    of the trace, unplug the unit, rotate the trace, then plug it back in
    to check. When you are happy, you unplug and tighten the clamps.

    Hope this helps!


    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
    Home of DaqGen, the FREEWARE signal generator
     
  7. Mike

    Mike Guest

    Hi Bob,

    Yeh, I was thinking about rotating the CRT with power off.

    Thanks again for the help... greatly appreciate it.

    Mike
     
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