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Wow! Here's the result of 90mA and 4kV through a burnt out appliance lamp after 3 minutes! A simple MOT can fry a lamp up to vacuum loss in less than 5 minutes! AND the current in the primary was limited by a heater element! On full primary current (with no limiter), I bet the result would be destructive! Keywords: Miscellaneous

Wow!

Here's the result of 90mA and 4kV through a burnt out appliance lamp after 3 minutes! A simple MOT can fry a lamp up to vacuum loss in less than 5 minutes! AND the current in the primary was limited by a heater element! On full primary current (with no limiter), I bet the result would be destructive!

1-29-11_007.JPG IMG_1260_Processed.jpg HPIM0111.JPG 100_0934.jpg 064.JPG
File information
Filename:HPIM0111.JPG
Album name:Vince / Miscellaneous
Keywords:Miscellaneous
Filesize:281 KiB
Date added:Jan 27, 2011
Dimensions:2592 x 1944 pixels
Displayed:160 times
Color Space:sRGB
Contrast:0
DateTime Original:2011:01:27 16:19:42
Exposure Bias:0 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:10/5147 sec
FNumber:f/3.6
Flash:No Flash
Focal length:7.5 mm
ISO:100
Light Source:Unknown: 0
Make:Hewlett-packard
Max Aperture:f/3
Model:HP DVC V5061u
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=4872
Favorites:Add to Favorites

Comment 1 to 11 of 11
Page: 1

rjluna2   [Jan 28, 2011 at 01:29 AM]
I bet you were really bored Razz
TiCoune66   [Jan 28, 2011 at 01:32 AM]
Yeah, reaaaaaaaaaaaaaaally bored XD
Silverliner14B   [Jan 28, 2011 at 04:00 AM]
You know, a very similar thing can happen when you overdrive incandescent bulbs on ballasts. I observed very cool arcing in bulbs when operating them on mercury ballasts. Especially the Chinese dollar store bulbs with single coil filaments.
A_lights   [Feb 03, 2011 at 05:40 PM]
@Silverliner14B: ive done the same thing with an LOA HPS ballast, i had a dead GE halogen and stuck it on there and there was a little arc between the broken fillament and working, then i moved it back to 120V and it lit up for a few minutes again, talk about a second lifetime Laughing
Form109   [Feb 13, 2011 at 10:26 AM]
i connected a Phillips 130 Volt Heavy-Duty Incandescent lamp with a broken filament to a 120-240 Step up Transformer ballasted by a 70 Watt HPS Ballast....i shook the Lamp around til the two broken ends of the filament touched...the result was a long-sustained arc with the ends of the filament glowing brightly. Razz
Tmcdllr   [Feb 13, 2011 at 10:29 AM]
The resistor is in a strange spot.
streetlight98   [Feb 16, 2013 at 05:56 PM]
Hmm. when i was testing a Sylvania incandescent, the filament had broken off on one end so i turned it on and tapped the lamp gently until the broken end touched the stem and it works! lol BTW, does the filament have to be in the same exact spot it was originally in or does it not matter so long there is only one end on each stem?
A_lights   [Feb 16, 2013 at 06:47 PM]
Not.always...I've had night light bulbs have filaments shorted together when they break off in a shorter length and they get real bright Shocked in one case i had a C-7 bulb blow.up
streetlight98   [Feb 16, 2013 at 07:44 PM]
I've had that happen too, btu in this case, it looks like they may have even forgotten to solder on the other end of the filament! It's a 130V lamp and is frosted, but for some reason sylvania slacks off with applying the powder on the 130V lamps so you can still see the insides. Confused I was testing it and it seems to work now lol.
GEsoftwhite100watts   [Feb 17, 2013 at 03:55 AM]
Mike, I've "Repaired" bulbs that way too..
joe_347V   [Feb 17, 2013 at 05:34 AM]
I've has this happen too, once the filament arced and it broke into pieces.

Comment 1 to 11 of 11
Page: 1
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