[time-nuts] [OT] degausing
Craig S McCartney
CMcCartney at on-sitetraining.com
Sat Apr 17 16:51:44 UTC 2010
Magnus,
No, we did not think of that at the time. A good idea, but if it worked
the customers at the trade show would have had to stand on their heads
to see the picture properly.
Craig McCartney
WA8DRZ
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Magnus Danielson
Sent: Saturday, April 17, 2010 8:27 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] [OT] degausing
Craig S McCartney wrote:
> A bit off topic, but likely interesting to time-nuts:
>
> In the early days of HDTV (late 80s - early 90s) we were at a European
> trade show and had to borrow, at the last minute, a large (~40")
> CRT-based HD monitor from a Dutch company that was also exhibiting
> there. We liked it so much that we purchased it for use at other
> trade shows. The very next show was in Sydney, Australia. The
> monitor would not converge and had funny rainbow patterns no matter
> how many times we degaussed it. Thinking it had been damaged in its
> half-way around the world shipment we called in the local
> representatives of the Dutch manufacturer and they were as stumped as
> we were. Finally, after they talked to engineers at the factory, the
> explanation was: "Of course, that is a Northern Hemisphere monitor;
> the earth's magnetic field is much different in the Southern
> Hemisphere. It can't work there.". After the show we shipped it back
> to our headquarters in California and, sure enough, the picture was
perfect.
>
> So, we had a HDTV monitor that doubled as a earth hemisphere detector,
> using magnetic flux differential. Needless to say, we only used it in
> northern hemisphere shows after that.
Did you ever tried to run it upside down?
Cheers,
Magnus
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