Why cannot you just present your arguments and stop slagging others off a
bit, and we might just understand waht you really mean.
Basically, the replay head reacts to changes in magnetic flux, thus
whatever you record, only the changes can be read. Many portable machines
use a permanent magnet to erase the tape. DC if you will, but all you hear
if you replay it is the sound of the tape bumping about as it passed the
erase head.
Of course most tape machines use ac to erase and also to bias the magnetic
material to a more linear part of its flux curve between saturation and the
non linear low end.
If you listen to cheap recorders with dc bias, not only are they noisier
due to the dc,and bouncing, but only have half the dynamic range.
I take issue with you about what a square wave is.
If, for example you had a square wave with a 3v p to p level, and the zero
in the middle, then you have plus and minus 1.5. If you had a frequency
variation on it and made each cycle half an hour long, you would have a psu
switching every half hour to the two polarities at 1.5 v. Of course if you
moved your zero point....
You can view a lot of things in electronics in lots of ways, as behaviour of
what you are testing is surely easier to grasp if one looks at it in an
understandable way.
I'd better not go on here, as we might start talking about speaker cables..
Brian
--
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"Phil Allison" wrote in message
...
"Brian Gaff"
Tape, as I said in another response here had problems as it was obviously
impossible to record DC to a tape, so the flat tops were not flat.
** Huh ???????
Response down to DC is not a requirement for flat topped square waves !!!!
Square waves are NOT " little bits of DC " as fools like YOU think !!!!
You did not cover this aspect,
** Good thing he did not - since it would have been total ********.
For god's sake, learn some electronics - you damn fool.
.... Phil