ballantine 1010a oscilloscope

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

Mike

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

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.

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

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

Hi Bob,

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

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

Mike