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Date: 29 Apr 2005 18:33:33 GMT
From: Dave Hinz <>
Subject: Re: Headlight problem

On Fri, 29 Apr 2005 14:00:13 -0400, Malt_Hound <Malt_Houndnospamm*> wrote: > Dave Hinz wrote: >> It's just a guess, but I could never keep GE bulbs in my c900 for >> any length of time. Particularly annoying/amusing since I worked >> for GE (Medical) at the time. > > In lovely Waukesha, no doubt. That's the place. Good place to, er, be from. Looks great on a resume. Met a lot of good people there. You can see what I'm saying by what I'm not saying on this one. >> For the record, you can't use GE lightbulbs in the scan room of a GE >> MRI scanner either - it puts horizontal streaks in the images. Need >> to use Philips bulbs (a maker of a competing MRI scanner). Had some >> fun with that one too ;) > For the record Dave? Nonsense. I still do work in MRI and it's not the > brand of bulb that matters. It's what's driving the bulbs. You can't > use AC lighting in a storng magnetic field because the filaments will > vibrate at 60hz and fragment. GE bulbs are as good as any in a magnet room. Sorry, but not nonsense. The GE bulbs gave zippers on 1.5T systems. This was 1992-ish, maybe GE has changed their filament design since. But, the site install specs called out Philips bulbs, with part number. DC, as I recall. At the time, the root cause analysis was that the filament in the GE bulb was (thinner and more tightly coiled) while the Philips bulb was thicker and more gently coiled, or the other way around. I'm trying to dredge up the name of the guy who explained it to me. Howes would remember, McCabe probably would too. And I'm pretty sure it wasn't just mobiles, so any of the MedFacs guys from back then could back it up as well... So which of the two Freds are you? I'm guessing you live in Farmington? Dave

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