"charles" wrote in message
...
In article ,
harryagain wrote:

"tony sayer" wrote in message
...
In article , harryagain
scribeth thus

"tony sayer" wrote in message
...
A Perfick sine wave is the one thing you will not see;!...

And how exactly will you see how perfect or not perfect it is?
Just
eyeball
it?
Heh heh, You are as bad as TurNiP

The only way to be absolutely sure is to get a piece of graph paper
and
some
sine tables and draw your own.
And those tables were derived geometrically not by some stupid
computer.
Similar geometry to that going on in an alternator.
And any non sinusiodal AC passed through inductors and capacitors,
gradually
gets to look more and more like a sine wave interestingly.




.

There are lot of distortions on the mains waveform.


Answer this question if you will. Have you got an Oscilloscope or
not?..

No.


Well perhaps you should then you'll se what the mains really does
look
like;!..


I saw it years ago. It was only a mildly interesting experience that I
wouldn't be interested in repeating.

I don't recall any significant "distortion". Just an occasional spike.

Why do you suppose the mains would have a non sine wave? Every effort
is
made t omake it a sine wave.
Sine waves comenaturally toany rotating electrical device
Any deviation reduces the efficiency of any AC magnetic device



Harry .. things have moved in since you looked after your boilers.

The mains these days has some rather "unpleasant" loading on it usually
by semiconductor devices not transformers near saturation. Why is it
that I can clearly see these even late at night when the loading on
substation transformers goes right down?.

Answer me that one if you will..

The electrical load controlled by electronic devices is trivial compared
with total load.


True, but a few "not very good" fluorescent lights can make mains cables
radiate on medium wave for quite a long way.

But that is not going to clip the mains sine wave form.
Just an annoyance on your radio.