Article View: sci.electronics
Article #5236Re: vcr recording
From: Jeff DePolo
Date: Tue, 24 Jul 1990 19:22
Date: Tue, 24 Jul 1990 19:22
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2125 bytes
In article <1990Jul19.222558.7820@mozart.amd.com> zahid@mozart.amd.com (Zahid Ahsanullah) writes: >The symptoms are if you are viewing >from the recording vcr end, a slight but periodic change in the >brightness of the screen. This is not the case if you just want >to view the movie. > >Any of you guys got any circuits out there? Really appreciate it. > > Zahid The varying brightness is characteristic of MacroVision, one of the better anti-duplication schemes. You may also notice a horizontal bar that moves from the top to the bottom of the screen on your duplicate tape. In any event, MacroVision can be defeated. You can buy copy boxes for about $50 that will take care of the problem or you can build one yourself. Supposedly there was a recent article in Radio Electronics (I think) that had the plans for one. Total on the parts would probably run close to $30 or so anyway, so it may be easier just to buy one. Look in the back of Radio Electronics, Video Magazine, Video Review, etc. to find ads for these things. --- Jeff +-----------------------+-----------------------------------------------------+ | Jeff DePolo N3HBZ | Internet: depolo@eniac.seas.upenn.edu | | Univ. of Pennsylvania | RF: 146.685- 224.40- 442.70+ 144.455s (Philadelpia) | | Computer Science Eng. | Twisted pair: (215) 386-7199 home | | Class of 1991 | Carrier pigeon: 420 South 42nd St. Philly, PA 19104 | +-----------------------+-----------------------------------------------------+
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!rpi!uwm.edu!psuvax1!rutgers!netnews.upenn.edu!eniac.seas.upenn.edu!depolo From: depolo@eniac.seas.upenn.edu (Jeff DePolo) Newsgroups: sci.electronics Subject: Re: vcr recording Message-ID: <27427@netnews.upenn.edu> Date: 24 Jul 90 19:22:43 GMT References: <1990Jul19.222558.7820@mozart.amd.com> Sender: news@netnews.upenn.edu Reply-To: depolo@eniac.seas.upenn.edu.UUCP (Jeff DePolo) Distribution: na Organization: University of Pennsylvania Lines: 31