Matched Pair RCA USA 1S5 [DAF91] Zenith Transoceanic Vacuum Tubes 76%

RCA $3.71

Tube Type / Number: 1S5 [DAF91]
Actual Brand*: RCA
Printed Brand: Emerson & RCA
Quantity of Tubes: Matched Pair
Plate Construction: Silver Smooth
Getter Construction: Top []
Country of Manufacture: USA
Visible Date Codes: 839 274 & 026
Lettering Condition: 10 Percent
Year Made:
Mica Spacers: 2
Smoked Glass? No
Engraved Base? No
Boxes Included? 2 Boxes - Both NOT Original
Notes: For Zenith Transoceanic

Gm Test Results: 16/44 & 18/45

Minimum Good Value: 13/20
NOS Test Value: 21/30
Life Calculation: 76% & 86% (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.

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Description

Tube Type / Number: 1S5 [DAF91]
Actual Brand*: RCA
Printed Brand: Emerson & RCA
Quantity of Tubes: Matched Pair
Plate Construction: Silver Smooth
Getter Construction: Top []
Country of Manufacture: USA
Visible Date Codes: 839 274 & 026
Lettering Condition: 10 Percent
Year Made:
Mica Spacers: 2
Smoked Glass? No
Engraved Base? No
Boxes Included? 2 Boxes - Both NOT Original
Notes: For Zenith Transoceanic

Gm Test Results: 16/44 & 18/45

Minimum Good Value: 13/20
NOS Test Value: 21/30
Life Calculation: 76% & 86%
(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.

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Additional info

SKU: PX881
Availability: Ships in 1 business day or less.
Shipping: Calculated at Checkout