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Lets try something a little different....
Measure that same spot using d.c.
1. put the scope on gnd. using that 3 position switch input for channel 2
2. move the display trace to a lower line on the grid, using the position knob.
3. turn the 3 position knob to dc, then measure the 125v source, see that it reads 125.
4. check tp5 again, see if it saturates at what the 125v source is...
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Yes you can call me "Squirrel boy"
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