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  • Date Matched Pair Sylvania USA 6BQ5/EL84 Black Plate Vacuum Tubes 78% & 79%

Date Matched Pair Sylvania USA 6BQ5/EL84 Black Plate Vacuum Tubes 78% & 79%

$62.95
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Product Description

Tube Type / Number: 6BQ5/EL84
Actual Brand*: Sylvania
Printed Brand: Zenith
Quantity of Tubes: Date Matched Pair
Plate Construction: Black
Getter Construction: Top O
Country of Manufacture: USA
Visible Date Codes: 312/052/AER [2]
Lettering Condition: 100 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape: Sawblade
Smoked Glass? Clear
Engraved Base? No
Boxes Included? Multiple Boxes - NONE Original
Notes:

Gm Test Results: 9250 & 9500

Minimum Good Value: 7500
NOS Test Value: 12000
Life Calculation: 78% & 79% (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.

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