Western Electric
Western Electric USA 403B [5591] Black Plate Top [] Get Vacuum Tube 80%
- SKU:
- TE668
- UPC:
- Western Electric 403B
- MPN:
- Western Electric 403B
- Availability:
- Ships in 1 business day or less.
- Shipping:
- Calculated at Checkout
Description
Tube Type / Number: 403B [5591]
Actual Brand*: Western Electric
Printed Brand: Western Electric
Quantity of Tubes: Single
Plate Construction: Black Smooth
Getter Construction: Top []
Country of Manufacture: USA
Visible Date Codes: 652
Lettering Condition: 100 Percent
Year Made:
Mica Spacers: 2
Smoked Glass? No
Engraved Base? No
Boxes Included? 1 Box - Not Original
Notes:
Gm Test Results: 28
Minimum Good Value: 21
NOS Test Value: 35
Life Calculation: 80% (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.