> > And your screen is all distorted by the side effects of gauss
> > > So your icons in the window are as wavy as a souse
> > ...
> > ,
> >
>=20
> It was.
> But, that was before icons happened.
>=20
> Long ago (about 1978 I think), I used to use a terminal ("the computer" w=
as
> 400 miles away) in an alcove (excavating for a mine ?).
>=20
> On irregular occasions some minutes apart the screen image would sway to
> and fro left to right with a "wave" that ran up the screen. All still per=
fectly
> legible
>=20
> We discovered it was caused by the loop of traction cables for the passen=
ger
> lift on the other side of the alcove wall. These hang in a "tail below th=
e lift
> and passed a few feet away from the terminal.
>=20
> Knowing the magnitude of the fields involved and whether they met any
> then-existing or current standards, and whether it actually matters, woul=
d be
> interesting. Bzzzt ...

One of our engineers had a similar situation, which, like yours, was traced=
 to the fact the terminal backed onto the lift shaft, and it was thought th=
at as the counterweight for the lift went past it affected the magnetic fie=
ld of the deflection yoke, causing the whole displayed screen to carry out =
a circular motion without any distortion.

Ah the joys of CRT screens, what the engineers of tomorrow will miss with n=
o magnetic deflection components in their screens ...


--=20
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