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Old 22nd March 2013, 12:02 AM   #61
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Join Date: Jun 2005
No it was not, i am sorry but there is a nice "autoset" button on my scope that i used.
Here is what i got(probe is still x10).
Please take into account the comment on T400/T401 in my earlier post.
Attached Images
File Type: jpg Q430 2nd leg.JPG (873.6 KB, 43 views)
File Type: jpg Q431 3rd leg.JPG (892.1 KB, 36 views)
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Old 22nd March 2013, 12:45 PM   #62
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Join Date: Nov 2003
Location: Louisiana
On the second photo, the top of the waveform appears to be 8-10v above ground. It should be getting pulled down to ground (to the reference line, if the trace was aligned with the reference properly). Is the waveform displayed accurately or was the trace not aligned to the reference?

I don't know if the transformers normally run hot or cold. I don't repair many 30001s.
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Old 22nd March 2013, 12:49 PM   #63
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it was aligned accurately as you suggested.
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Old 24th March 2013, 02:00 AM   #64
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Location: Louisiana
I need to try to find an amp to use as a reference to confirm something. It may be a few days before I can locate one.
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