TESTS LOW Unknown USA 5U4GB Brown Base Vacuum Tube Test=36/42
- SKU:
- TX2933
- UPC:
- 5U4GB
- MPN:
- 5U4GB
- Availability:
- Ships in 1 business day or less.
- Shipping:
- Calculated at Checkout
Description
Tube Type / Number: 5U4GB
Actual Brand*: Unknown
Printed Brand: Unknown
Quantity of Tubes: Single
Plate Construction: Black Smooth
Getter Construction: Top O
Country of Manufacture: USA
Visible Date Codes:
Lettering Condition: 0 Percent
Year Made:
Mica Spacers: 2
Smoked Glass? No
Engraved Base? No
Boxes Included? 1 Box - Not Original
Notes: Brown Base (TESTS LOW - NO GUARANTEES)
Gm Test Results: 36/42 (TESTS LOW - NO GUARANTEES)
Minimum Good Value: 40/40
NOS Test Value: 50/50
Life Calculation: Test=36/42% (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.