[time-nuts] [OT] degausing

Craig S McCartney CMcCartney at on-sitetraining.com
Sat Apr 17 12:51:44 EDT 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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