NOS Date Matched Pair Sylvania USA 25Z5 Engraved Base rtl Vacuum Tubes

Sylvania $13.46

Tube Type / Number: 25Z5
Actual Brand*: Sylvania
Printed Brand: Sylvania
Quantity of Tubes: Date Matched Pair
Plate Construction: Black
Getter Construction: D Foil
Country of Manufacture: USA
Visible Date Codes: 7A & 7A
Lettering Condition: 75 Percent
Year Made:
Number of Mica Spacers: 2Oval I Round
Glass Coating: Clear
Engraved Base? Yes
Boxes Included? Multiple Boxes - NONE Original
Notes: ST, Both Tubes Rattle

Gm Test Results: 61/61 & 61/62

Minimum Good Value: 40/40
NOS Test Value: 50/50
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.

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Description

Tube Type / Number: 25Z5
Actual Brand*: Sylvania
Printed Brand: Sylvania
Quantity of Tubes: Date Matched Pair
Plate Construction: Black
Getter Construction: D Foil
Country of Manufacture: USA
Visible Date Codes: 7A & 7A
Lettering Condition: 75 Percent
Year Made:
Number of Mica Spacers: 2Oval I Round
Glass Coating: Clear
Engraved Base? Yes
Boxes Included? Multiple Boxes - NONE Original
Notes: ST, Both Tubes Rattle

Gm Test Results: 61/61 & 61/62

Minimum Good Value: 40/40
NOS Test Value: 50/50
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.

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Additional info

SKU: PM307
Availability: Ships in 1 business day or less.
Shipping: Calculated at Checkout