Description
Tube Type / Number: 6BL8 [ECF80]
Actual Brand*: Motorola
Printed Brand: Motorola
Quantity of Tubes: Single
Plate Construction: Gray
Getter Construction: Top O
Country of Manufacture: Japan
Visible Date Codes: NNO16547 7M L527
Lettering Condition: 100 Percent
Year Made:
Number of Mica Spacers: 2
Glass Coating: Clear
Engraved Base? No
Boxes Included? 1 Box - Not Original
Notes: For Mcintosh MR-67 65B
Gm Test Results: 60/60
Minimum Good Value: 34/36
NOS Test Value: 56/59
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.