you never know what you can find if you just ask

[Gordon JC Pearce]

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.

Gordon.