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- Newsgroups: sci.electronics
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!sdd.hp.com!ux1.cso.uiuc.edu!news.iastate.edu!class1.iastate.edu!sehari
- From: sehari@iastate.edu (Babak Sehari)
- Subject: Re: How to filter out EMI/RFI from TV signal
- Message-ID: <sehari.721023709@class1.iastate.edu>
- Originator: sehari@class1.iastate.edu
- Keywords: TVI problems
- Sender: news@news.iastate.edu (USENET News System)
- Organization: Iowa State University of Science and Technology, Ames, Iowa.
- References: <1992Nov05.202945.26916@bnr.ca>
- Date: Fri, 6 Nov 1992 04:21:49 GMT
- Lines: 30
-
- In <1992Nov05.202945.26916@bnr.ca> grier@bnr.ca (Brian Grier) writes:
-
- >It depends on how the noise is getting to the TV
-
- >> Several appliances seem to introduce EMI/RFI to the TV signal, namely
- >> my CD players (portable and component), my PC (386DX), and the usual
- >> hair dryer, maicrowave, etc. I'm interested in finding out what I can
- >> do to make the TV signal more pure. Here are some observations:
-
- >If the interference is being transmitted via the airways then you are
- >probably in a bit of trouble. However is the noise is being transmitted
- >via the power lines you may be in luck. Try wrapping the power lines
- >from your CD player and TV around a toroid. Six or seven turns will
- >clean up most common mode noise. The toroids are available at Radio
- >Shack, and cost around $15 for a pack of four.
-
- >Brian, WS1S
- >Bell Northern Research
- >Research Triangle Park, NC
-
- There are also cable magnet, which are high u(r) materials that make
- the noise to disappear.
-
- Noise form air could be cancel out by using high directivity antenna and/or
- active noise canceling methods.
-
- With highest regards,
- Babak Sehari.
-
- --
-