Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!att!mcdchg!ddsw1!corpane!sparks
From: sparks@corpane.UUCP (John Sparks)
Newsgroups: sci.electronics
Subject: Re: Looking for vibration-noise abatement product
Message-ID: <845@corpane.UUCP>
Date: 21 Jun 89 17:52:47 GMT
References: <25538@agate.BERKELEY.EDU>
Reply-To: sparks@corpane.UUCP (John Sparks)
Organization: Corpane Industries, Inc.
Lines: 21

In article <25538@agate.BERKELEY.EDU> hughes@math.Berkeley.EDU (Eric Hughes)
writes:
>The first is the flyback transformer in my CRT.  Occasionally it
>whines pretty loudly, but a good whack on the side of the case makes
>it go away.  Honest.

This one seems to make the usenet rounds about once every 2 months or so. :-)

The high frequency noise is 15Khz as the flyback works the horizontal scanning
on the CRT. It is at a potential of 25KV. There is a substance called "Corona
Dope" available as a paint or spray that is a very good insulator. It is used
to repair leaking high voltage leads from the flyback to the CRT. You
might try to put some of this on the Flyback and its core to stop the
vibrations (noise). 

Just make sure it is something with a high insulation value like corona dope.

-- 
John Sparks   |  {rutgers|uunet}!ukma!corpane!sparks | D.I.S.K. 24hrs 1200bps
|||||||||||||||          sparks@corpane.UUCP         | 502/968-5401 thru -5406  
I'm the person your mother warned you about.