Cartrivision Camer-A-Thon, Part 3, Circuit Deep Dive

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In this long awaited video, we will do a deep dive into the circuits of the 1972 Cartrivision vidicon tube camera. The video is fairly well detailed and 28 minutes long. There are typos. This is inevitable. An effort is made to indicate this in the graphic overlays as we plow on through this heady topic. Sorry for the long delay. I started a new job and the amount of spare time has been cut back dramatically. The graphics took a couple of weeks as I had to transcribe the original spaghetti schematics into Kicad in a cleaned up and much more logical form. Hopefully this video will make up in some small way for the unfulfilled Craig 6402 video series. Enjoy!
My web site, Labguy's World: www.labguysworld.com

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Опубликовано:

5 авг 2024

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Комментарии : 5

@worldsgreatestride 14 дней назад

Lab Guy Larry here from Downey Cartrivision. That's a good presentation. Now let me see you explain how the drop out compensation circuit works in the fishtank. That circuit must of been designed by a genius.

@k8zhd 2 года назад

It is interesting to see what Eumig/Cartrivision did in the circuits for this simple camera. Care in the focus regulator and the sync generator was not so common in cheap cameras, so this was clearly a (slight) step up. The DC current into the Vertical Yoke, with a thermistor in series, is a bit unusual - maybe a fix for a local magnetic field? Your "dramatic reading" was pretty good, and the visuals were excellent.

@flymario8046 2 года назад

This completely blows my mind. You said that one of the transistors keeps the signals in sync with the 60hz line. I never understand how a clock can be synchronized with another clock like this. I know this happens a lot with video circuits. There must be so much engineering to get this all to work properly. I am impressed by your abilities. Maybe I need to get a breadboard out and try some of these things.

@andydelle4509 2 года назад

Interesting that they had a true 2:1 interlaced sync generator built in. As you are well aware most low cost B&W cameras of the day utilized random interlace with separate H & V oscillators. The penalty for that was poor vertical resolution.

@flymario8046 2 года назад

Analog circuits are so very hard to follow. Digital forever!