TESTS LOW National Union 6SJ7GT Silver Smooth Plate Metal base Vacuum Tube 58%

Tube Type / Number: 6SJ7GT
Actual Brand*: National Union [NU]
Printed Brand: National Union
Quantity of Tubes: Single
Plate Construction: Silver Smooth
Getter Construction: Top []
Country of Manufacture: USA
Visible Date Codes: LN
Lettering Condition: 100 Percent
Year Made:
Mica Spacers: 2
Smoked Glass? No
Engraved Base? No
Boxes Included? 1 Box - Not Original
Notes: Metal Base, Tall Bottle TUBE TESTS LOW - NO GUARANTEES

Gm Test Results: 38 (TESTS LOW)
Minimum Good Value: 40
NOS Test Value: 66
Life Calculation: 58% (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.