Matched Pair International Servicemaster Japan 6DJ8/ECC88 Vacuum Tubes 80%

Tube Type / Number: 6DJ8/ECC88
Actual Brand*: International Servicemaster
Printed Brand: International Servicemaster
Quantity of Tubes: Matched Pair
Plate Construction: Gray
Getter Construction: Top O
Country of Manufacture: Japan
Visible Date Codes:
Lettering Condition: 75 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape: Sawblade
Smoked Glass? Clear
Engraved Base? No
Boxes Included? Multiple Boxes - NONE Original
Notes: Silver Center Plates

Gm Test Results: 88/90 & 90/74
Minimum Good Value: 62/62
NOS Test Value: 102/102
Life Calculation: 87/88% & 88/72% (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.