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Thermal Gradient

Thermal Gradient

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Intentionally underpowered single coil filament.
Three or four threads (of the same material) are needed for the incandescence to start. Makes me also wonder why filaments often crack at the beginning, where the temperature is the lowest.

calla.jpg ortenak.jpg tempgrad.jpg sana_new.jpg

Light Information

Light Information

Manufacturer:Tes-Lamps
Lamp
Lamp Type:incandescent
Filament/Radiator Type:single coil
Electrical
Wattage:40W
Voltage:24V (running at some 1/4 voltage, using a fluorescent choke)

File information

File information

Download: Download this File
Filename:tempgrad.jpg
Album name:merc / Misc19
Keywords:Miscellaneous
File Size:422 KB
Date added:Feb 13, 2019
Dimensions:999 x 667 pixels
Displayed:64 times
Date Time:2019:02:13 18:49:37
DateTime Original:2019:02:13 18:40:47
Exposure Bias:0 EV
Exposure Time:1/20 sec
FNumber:f 0
Flash:No Flash
Focal length:24 mm
ISO:100
Make:RICOH IMAGING COMPANY, LTD.
Model:PENTAX K-S1
Software:darktable 2.6.0
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-156228
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Comments
Medved
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Feb 13, 2019 at 12:22 PM Author: Medved
Temperature is the lowest, so is the resistance, so the power dissipation is the highest, leading to the largest gradients. Plus cold metsl is rather hard, so the loudest when stressed (by the thermal gradients)

No more selfballasted c***

rjluna2
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Robert


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Feb 13, 2019 at 12:36 PM Author: rjluna2
No wondered why so many of the filament failed near at the wire connectors

Pretty, please no more Chinese failure.

merc
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Adam


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Feb 13, 2019 at 01:07 PM Author: merc
These factors are obviously more relevant than the material degradation caused by the extreme heat.

Not a misoLEDist...

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