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Conference napalm::commusic_v1

Title:	* * Computer Music, MIDI, and Related Topics * *
Notice:	Conference has been write-locked. Use new version.
Moderator:	DYPSS1::SCHAFER

Created:	Thu Feb 20 1986
Last Modified:	Mon Aug 29 1994
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2852
Total number of notes:	33157

2287.0. "Atari monitor and 1000PX interference problem" by NORGE::CHAD () Tue Mar 13 1990 13:13

(is there a better place for this note in theis conference?)

Hi,

I am having a problem with interference on my Atari ST monochrome monitor
(SM124).  It sits on a tier of my three tier keyboard stand.  On the tier 
above it sits a Kurzweil 1000PX MIDI sound module.  When the Kurzweil is on
the monitor screen jiggles back and forth (or is it up and down???) or
quivers a bit.  It is very annoying and I don't want anything permanent
to happen to it.  When the Kurzweil is off, this doesn't happen.  This
doesn't happen when the other MIDI gear also sitting in my new rack above
the monitor is on.

Any ideas on how to cure this probem (and exactly what is it?  I'm not
that knowledgable about this kind of stuff).

Thanks

Chad

T.R	Title	User	Personal Name	Date	Lines
2287.1	keep magnets away from color displays too!!!	MILKWY::JANZEN	Noting is a privilege not a right	`Tue Mar 13 1990 13:26`	5
	If the atari monitor is pretty small, and the power transformer of the kurz is directly above it only a couple inches away, it could be magnetic field interferences. I used to do that deliberately as a kid. Tom
2287.2		KOBAL::DICKSON		`Tue Mar 13 1990 14:51`	2
	Does the Kurzweil have a fan in it? How fast does the wiggling happen on the screen?
2287.3	...	NORGE::CHAD		`Tue Mar 13 1990 15:00`	3
	No fan. The quivering is quite quick but it is noticable ie, not blur. Chad
2287.4	The monochrome monitor is worst about this	PRNSYS::LOMICKAJ	Jeffrey A. Lomicka	`Wed Mar 14 1990 16:01`	4
	You realise, of course, that the Atari monitor has a 70hz refresh, and therefore, when placed in the proximity of a 60hz magnetic field, you will get (according to Mr. Hetrodyne) a 10hz interference wiggle. 10hz is about worst case for your eyes.
2287.5	solved	NORGE::CHAD		`Thu Mar 15 1990 17:30`	5
	I ended up switching the TX16W and the 1000PX around and now no problem! Thanks Chad