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Tube Type / Number: 6A7
Actual Brand*: Ken-Rad
Printed Brand: Crosley
Quantity of Tubes: Single
Plate Construction: Silver Ribbed
Country of Manufacture: USA
Visible Date Codes:
Lettering Condition: 100 Percent
Number of Mica Spacers: 2Circle
Glass Coating: Black Smoked-Half
Engraved Base? Yes
Boxes Included? 1 Box - NOT Original
Notes: Cracked Base
Gm Test Results: 40
Minimum Good Value: 29
NOS Test Value: 48
Life Calculation: 83% (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.