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IMG_0389

Soviet pentode GU-50. Testing filament on the bench. iphone camera doesn't want to focus this close.

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Uploaded on January 5, 2010
Taken on January 4, 2010

IMG_0389

Soviet pentode GU-50. Testing filament on the bench. iphone camera doesn't want to focus this close.

601 views
0 faves
0 comments
Uploaded on January 5, 2010
Taken on January 4, 2010
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