NOS NIB Thorn-AEI (Mazda) France 6U8A/6AX8/6KD8/5KD8 Gray Plate Vacuum Tube

Tube Type / Number: 6U8A/6AX8/6KD8/5KD8
Actual Brand*: Thorn-AEI (Mazda)
Printed Brand: GE
Quantity of Tubes: Single
Plate Construction: Gray/Gray
Getter Construction: Top O
Country of Manufacture: France
Visible Date Codes: EW/188-5/6713/UH1
Lettering Condition: 90 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape: Sawblade
Smoked Glass? Clear
Engraved Base? No
Boxes Included? 1 Box - Original
Notes: Tested For Emissions Only

Gm Test Results: 100/90
Minimum Good Value: 60/60
NOS Test Value: 90/90
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.