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Compact Mac CRT - what are its power requirements?


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I was wondering if I might be going about this backwards? First pass would be measureing the pins on the end of the AB->MLB connector. That doesn't look right  in my skull though. I've got a pretty strong feeling that an attempt at testing while not under load would be an error in the ID10T class.

 

I've got a notion that I may need to build an extension cable with amperage(?) test points built in to monitor/determine power draw of the logic board's various voltages in a non-destructive manner. Figuring out the CRT circuitry's requirements would be great to know up front, but monitoring the climbing requirements of my insane contraption at various stages of development seems like it might be a great way to keep the power budget in check?

 

Dunno, my brain hurts when processing Ohm's law, but setting up an electron plumbing rig for the new autoranging digital multimeter toy to give me various individual readouts to simplifying the methodology to the point of just plugging them into a spreadsheet looks like it might be a fun first project.

 

Me builds spreadsheets for breaking functions like Ohm's black magicals into automagicals just fine! [:)]]'>

Edited by Trash80toHP_Mini
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Well, the CRT won't do anything without the logic board telling it what to do, but it should draw more than zero.

 

If you can determine the wattages of the logic board and any spinning media and subtract those from the machine's total draw, whatever the difference is should be for representative of the CRT's wattage.

 

???

 

c

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Clinton still makes the 9" CRT, believe it or not! They sell it as a CCTV display in self-contained form.

 

https://clintonelectronics.com/products/monitors/7in-12in-monitors/ce-mm9/

 

This may give you some insight into your questions on power consumption, especially if your plans were to power it in some way not connected to the Mac.

 

In all honesty, I sort of want to get one of those monitors. I like the style of them!

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A search of Alibaba.com suggests that if you *really* want to sell a CRT TV there are still outfits in China willing to churn them out for you. (There are *many* listings for 14" color tubes in particular, so many it suggests that somewhere in the world people are actually still buying small color CRT TVs en-mass.)

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  • 2 months later...

Old-ish thread, but...

 

To answer Gorgonops, they're probably people in Japan, as they seem to really like old-fashioned technology (they were the last to get rid of LaserDiscs and I believe also VHS, among other things).

 

c

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They could also be used for really low budget people too, as these Chinese companies can likely churn out these 14-inchers really cheaply. Perhaps a complete TV set, complete with a DVD player in the bottom would cost only $70-90. edit: I double checked the prices, looks like they are to offer them for under $50 a piece! Add shipping, DVD player, and I think you could realistically target a $90 TV set, thats quite cheap, and many of the manufactures are advertising 720P capability.

Edit: It looks like a few of them specifically talk about Africa and the Middle East. But there are probably people in Japan buying these too.

I'm really curious, I hope other people share their thoughts on this.

 

Also, Gorgonops, I wonder if those Chinese CRT outfits could churn out some computer monitor tubes, or maybe some 9-inch tubes for compact mac tube replacement.

Edited by Themk
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I was noticing that a lot of them say "hotel TV" on them, I guess they expect hotels to still be using CRT TVs? IDK.

 

A few advertise different sizes of tubes, like you said, likely someone could convince them to build a tube. I wonder if these are FD Trinitron clones, if so, then that would be cool to have them build a few VGA (or digital input) computer monitors, maybe in a large size like 21-inches, or maybe build some 16:10 aspect ratio CRT computer monitors too. If we could get the price to similar levels of the CRT TVs, perhaps we could sell them as high resolution, high refresh rate (assuming the monitor has enough bandwidth), "gaming" monitors ;). If we got real fancy, we could even maybe include a scan doubler, that would draw two frames for every one frame sent in to the monitor (to allow for 60hz V-synced output from GPUs, but 120hz redraw rate on the tube)

 

Now this has seriously gotten off topic, I should move this to the lounge ;)

Edited by Themk
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