Betacam just isn’t the Betamax you’ll have had at residence– it was an expert format that lived on into the twenty first century, within the “SP” type. In lots of locations, it could have been the final tape format in use. So it’s maybe comprehensible that [ldursw] determined to recreate an out of date and unobtainable IC to avoid wasting a Sony broadcast-grade enhancing Video Tape Recorder (VTR). Nonetheless mad, maybe, however in a method we very a lot respect.
The Sony BVW-75 VTR had an odd flaw the place the output lacked color, until paused with dynamic monitoring off. Then color would seem, however solely in odd stripes. Clearly the chroma circuit was at fault. Some sluthing discovered {that a} sync separator IC– that separates the sync pulses that preserve all the things shifting collectively, if the title didn’t give it away– wasn’t behaving accurately. Extra sluthing discovered that the chip in query was not accessible. Fortunately, the idea of a sync separator hasn’t fairly given up the ghost, and one other half was accessible. It simply didn’t match, used a special voltage, and had an inverted output. No biggie! [ldursw] added a voltage regulator, an inverter, and a video amplifier chip, then after breadboard testing put them on a PCB with pins that match the unique IC’s form-factor, making it a plug-in substitute.
That’s a GitHub hyperlink at the beginning of this text, by the way in which, so he’s open sourced the answer for anybody who wants a Toshiba TA7357P video sync separator. We don’t know who else wants this, however we’re prepared to guess that whoever does, actually wants it. On behalf of whoever that may be, we provide honest because of [ldursw] for the hack, and for submitting it to our ideas line.
This reminds us a bit of little bit of a tape deck restore we featured beforehand, reviving one other Sony format– D-1 tapes–to archive outdated media.
