I did this for the very first sysem in 1975 they weren't dvr's back then and it was incorporated into a nurse call and computer system with 12 volt sony's on swing arms . so back then I would set up the head end with 1" spacer . and the video was sent to the computer thru the tv . first system was in a city across the river from philly, camden I believe and the second brooklyn ny . union job

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got better pay, than then you guys get today . to bad the people that owned the company got old and closed up shop .