NOS Matched Trio (3) Sylvania USA 6SK7GT Gray Plate Chrome D Vacuum Tubes

Tube Type / Number: 6SK7GT
Actual Brand*: Sylvania
Printed Brand: Sylvania
Quantity of Tubes: Matched Trio (3)
Plate Construction: Gray Wrinkled
Getter Construction: Top
Country of Manufacture: USA
Visible Date Codes: 0-09/C9A & 2-13/H1B & W/B2B
Lettering Condition: 75 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape: Round
Smoked Glass? Clear
Engraved Base? No
Boxes Included? Multiple Boxes - SOME Original, Some Generic
Notes: Chrome Dome, Metal Base [3]

Gm Test Results: 91 & 92 & 95
Minimum Good Value: 48
NOS Test Value: 79
Life Calculation: 100+% (where 65% = fail)

Tests as NOS?: Yes
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.