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Tube Type / Number: 6X5GT
Actual Brand*: Hytron
Printed Brand: Fomoco
Quantity of Tubes: Matched Pair
Plate Construction: Black Stacked
Getter Construction: Bottom D Foil
Country of Manufacture: USA
Visible Date Codes: 210 51-09 B & 210 51-05 B
Lettering Condition: 75 Percent
Number of Mica Spacers: 3
Mica Shape: Rectangle
Smoked Glass? Clear
Engraved Base? No
Boxes Included? 1 Box - NOT Original
Gm Test Results: 52/50 & 50/52
Minimum Good Value: 40/40
NOS Test Value: 50/50
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.