RCA USA 5Z3 / VT-145 2 Black Plate D Foil Get ST HANGING FILAMENT Vacuum Tube

Tube Type / Number: 5Z3 / VT-145
Actual Brand*: RCA
Printed Brand: RCA
Quantity of Tubes: Single
Plate Construction: 2 Black Smooth
Getter Construction: Bottom D Foil
Country of Manufacture: USA
Visible Date Codes: 56
Lettering Condition: 100 Percent
Year Made:
Number of Mica Spacers: 2
Mica Shape: Circle
Smoked Glass? Clear
Engraved Base? No
Boxes Included? 1 Box - NOT Original
Notes: ST, Hanging Filament

Gm Test Results: 46/48
Minimum Good Value: 40/40
NOS Test Value: 50/50
Life Calculation: % (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.