NOS NIB Date Matched Trio (3) Zenith USA 6CL8A Gray Plate Top O Get Vacuum Tubes

Tube Type / Number: 6CL8A
Actual Brand*: Zenith
Printed Brand: Zenith
Quantity of Tubes: Date Matched Trio (3)
Plate Construction: Gray
Getter Construction: Top O
Country of Manufacture: USA
Visible Date Codes: DGJ 343 748
Lettering Condition: 100 Percent
Year Made:
Mica Spacers: 2
Smoked Glass? No
Engraved Base? No
Boxes Included? 3 Boxes - All Original
Notes:

Gm Test Results: 44/80 & 44/78 & 44/76
Minimum Good Value: 20/35
NOS Test Value: 33/57
Life Calculation: 100+% (where 65% = fail)

Tests as NOS?: Yes
True NOS?*: Yes

** 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.