NOS Matched Pair Hytron USA 6D6 3 MICA Smoked Glass Rattle Vacuum Tubes

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Tube Type / Number: 6D6
Actual Brand*: Hytron
Printed Brand: Hytron
Quantity of Tubes: Matched Pair
Plate Construction: Silver
Getter Construction: Bottom
Country of Manufacture: USA
Visible Date Codes: 2-8 & 10-7
Lettering Condition: 75 Percent
Year Made:
Number of Mica Spacers: 3
Mica Shape: U
Smoked Glass? Gray Smoked-Half
Engraved Base? No
Boxes Included? Multiple Boxes - NONE Original
Notes: 1 Tube Rattles

Gm Test Results: 68 & 70

Minimum Good Value: 40
NOS Test Value: 66
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.

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Additional Information

Item Type:
Vacuum Tubes
Production Era:
Vintage & NOS
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