you never know what you can find if you just ask
Gordon JC Pearce
gordonjcp at gjcp.net
Mon Jan 30 00:03:20 CST 2006
Fred Cisin wrote:
>>>Back when Comdex was still active, there were a lot of technologies used
>>>for billboard sized screens. One of the techniques that I saw was a
>>>billboard made of thousands of 2" CRTs, using each 2" CRT as a single
>>>pixel. Each CRT only displayed 3 "lines", RED, BLUE, and GREEN.
> On Sun, 29 Jan 2006, Richard wrote:
>>Wow. I'd love to have seen a picture of that puppy! I wonder how
>>much power it drew when turned on :-)
> Good question.
> A lot of the billboard sized screens had trailered generators. I never
> knew which were due to amount of power consumption, v which were just a
> lack of convenient outlet.
There was one on eBay recently over here. I can't remember exactly what
the spec was but I think it was 60kVA three-phase power. This one used
clusters of LEDs and was mounted on an artic trailer.
Obviously the power included motors for the hydraulic pumps, but I
suspect they'd be a couple of kW at most and only used during setup.
Didn't follow the auction to the end but apparently if it made its
reserve they'd throw in a rough-but-running artic tractor to tow it with.
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