Here you can see a tantalum filament. I love to see this filament !!! It has 220v very rare since it comes from the United States. On the base it has patent 1904 marking. It is very difficult to find this type of wrinkled filament. It seems to stretch when hot and contract when cold.
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|File Size:||766 KB|
|Date added:||Sep 11, 2020|
|Dimensions:||1848 x 2464 pixels|
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