April 1, 2024
Vintage Tung Sol 6550 Smooth Black Plate Tube - Strong!
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Tung Sol branded 6550 tube with date code of 3225817-3 tested over 15000 w minimum value is listed as 5000 on my Hickock 6000 tube tester. Item has black smooth plates with no holes. Strong one! Please email with any questions or concerns. Thanks for looking!
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