Re: AC viewer bulbsBlazing Buttons

[John Dukes <dukes@xxxxxxxxxxxxxxxx>]

> 
> >Further point: I'm using 180 volts, not 140... >John Dukes
> 
> WOW!!! This confirms my long-held suspicion that the 120V/10W bulb is
> severely underrated at 120V, hence the distinctly orange color.
> 
> And for those who laugh at the idea of the 10W halogen bulb in a red-button
> viewer, let me remind you that the 120V bulb is a 10W bulb and so is the
> 75V when used at 120V.  In terms of heat and damage to the slide, I don't
> think there is a problem, even though, wearing sunglasses might be a good
> idea.
> 
> The funny part is that once you are used to the 10W halogen bulb and turn
> back to the 2W, you will wonder "who turned off the lights" and will want
> to go back to the bright 10W light.
> 
> George
> 
> 
George-- I went back home this noon to see what bulb I was using at that
outrageous voltage, (I was sure it was NOT a 10 watt version, otherwise
something like 22.5 watts in my beloved Kodak II). It is a 6S6 rated at
50 ma., i.e. 6 watts at 120 and 13.5 watts at 180 with my transformer.
Nothing gets cooked inside, and the bulbs seem to last at least for
as long as those fine 75 or 80 volt bulbs running at 120.  It's
white and bright and I like it, although had I not had a huge pile of
the 6S6's at the time I thought there were no more of the others I
probably would not have bothered.

The 13.5 watt estimate assumes that the filament stays constant in
resistance, which it certainly doesn't, and is perhaps appreciably
high. I may have to pull out the meter, measure the current, and see
the the power actually is. Or maybe there's a bulb man out there who
knows these things.

John 




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