Stupid Spinning Head, Tape Based Video Cameras!
They all rub a little oxide off the tape as they spin. And before you know it, the recording head becomes clogged and no longer writes :-(
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WHAT ARE YOU GONNA DO ???
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I bought 2 of these cleaner cassettes a couple of years ago, and they have kept my Sony TR-120 running LONG past it's expected lifetime.
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Soon it'll be time for a new Video Camera. I am NOT crazy about the current crop of DVD-R based cameras. Hard-Drive based cameras are the current way to go - - BOTH are power hungry solutions.
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BUT !!!
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With the arrival of Solid-State drives (VERY little battery drain, high reliability, currently expensive, but coming down rapidly) it won't be long before it doesn't matter that these cleaning tapes aren't available any more.
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Merlin