Matched Pair Sylvania USA 6DR7 Black Plate Top O Get Vacuum Tubes 119/84%

Tube Type / Number: 6DR7
Actual Brand*: Sylvania
Printed Brand: Sylvania
Quantity of Tubes: Matched Pair
Plate Construction: Black Ribbed
Getter Construction: Top O
Country of Manufacture: USA
Visible Date Codes: LC EKZ & FA ESP
Lettering Condition: 25 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape: Saw
Smoked Glass? Clear
Engraved Base? No
Boxes Included? Multiple Boxes - SOME Original, Some Generic
Notes:

Gm Test Results: 32/46 & 38/42
Minimum Good Value: 20/30
NOS Test Value: 32/50
Life Calculation: 100/92% & 119/84% (where 65% = fail)

Tests as NOS?: No
True NOS?*: No

** Please note, many tubes will test NOS but will actually have a few hours of use on them. A truly NOS tube will have excellent getter flashing condition, no dirt/grime, usually in the original box, and no filament deposits. If a tube is listed  as "tests NOS" but is listed as "not True NOS" please expect the tube to have a small amount of use *

All tubes have been tested using only the best tube testers. We have a large fleet of tube testers, and every single one of them has been calibrated within the last year by industry experts. We mainly use the Hickok TV-7D/U, but occasionally we may use a Hickok 539, 533A, or 600A.