NOS NIB Date Matched Pair GE 5 Star USA 5965A [12AT7] CLEAR TOP Vacuum Tubes

Tube Type / Number: 5965A [12AT7]
Actual Brand*: GE 5 Star
Printed Brand: GE 5 Star
Quantity: 2 Pieces-Matched Pair
Matching Date Codes? Yes
Plate Construction: Grey Ladder
Getter Construction: Side 2 O
Country of Manufacture: USA
Visible Date Codes: 63-04 188-5
Lettering Condition: 90 Percent
Number of Mica Spacers: 2
Mica Shape: Saw
Smoked Glass? Clear
Engraved Base? No
Boxes (always included): All Original
Notes: Industrial Long Life Version of the 12AY7. Can be used as a 12AV7, 12AY7, or 12AT7 drop-in Substititue.
Tested For & Matched By: Gm (General Mutual Transconductance)

Gm Test Results: 7400/7400 & 7800/7800
Minimum Good Value: 4400/4400
NOS Test Value: 6600/6600
Life Calculation: 100+% (where 65% = fail)

Tests as NOS?: Yes
True NOS?*: Yes

** 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.