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RCA

Matched Pair RCA USA 1631 Metal Vacuum Tubes 93%

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SKU:
PM2688
UPC:
RCA 1631
MPN:
RCA 1631
Availability:
Ships in 1 business day or less.
Shipping:
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On Sale
Now: $8.88
Was: $17.75

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Description

Tube Type / Number: 1631
Actual Brand*: RCA
Printed Brand: RCA
Quantity: 2 Pieces-Matched Pair
Matching Date Codes? No
Plate Construction:
Getter Construction:
Country of Manufacture: USA
Visible Date Codes: 57-26 & 58-13
Lettering Condition: 100 Percent
Number of Mica Spacers:
Mica Shape:
Smoked Glass? Metal
Engraved Base? No
Boxes (always included): All WB/Generic
Notes:
Tested For & Matched By: Gm (General Mutual Transconductance)

Gm Test Results: 33 & 38

Minimum Good Value: 25
NOS Test Value: 41
Life Calculation: 93% (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.

Returns

All of our tubes are 100% guaranteed to arrive as described, test as described and to be void of any sound defects. We offer a 30 day return window from the day you receive the item.

PLEASE NOTE - While we accept returns for basically any fault, we DO NOT accept returns for buyer's remorse which includes buyers who decide they don't like the subjective tonal signature of a tube. We have had people exploit our generous return policy to tube roll on our dime so we have a strict policy against this behavior.

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Additional Information

Item Type:
Vacuum Tubes
Production Era:
Vintage & NOS
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