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Early 3/4" decks were used on air but the station usually got a fine for broadcasting "non-program" material. The translation. The decks had horrible blanking timing errors resulting in a black stripe on the leading left edge. The stripe was the non-program material. The picture did not fill the screen. Early TBC's only fixed the mechanical jitter in any helical format. The BVU series was pretty good on blanking and the onboard TBC helped a lot. My BVU950 retired from an Ohio station is in great shape. And I still have an old school tech that can fix it.
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“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
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