True NOS NIB Matched Pair Sylvania USA 1L6 Top Fat D Get Vacuum Tubes 100%+
- Ships in 1 business day or less.
- Calculated at Checkout
Tube Type / Number: 1L6
Actual Brand*: Sylvania
Printed Brand: Sylvania
Quantity: 2 Pieces-Matched Pair
Matching Date Codes? No
Plate Construction: Silver Smooth
Getter Construction: Top Horseshoe
Country of Manufacture: USA
Visible Date Codes: 420
Lettering Condition: 90 Percent
Number of Mica Spacers: 2
Mica Shape: Saw
Smoked Glass? Clear
Engraved Base? No
Boxes (always included): All Original
Tested For & Matched By: Gm (General Mutual Transconductance)
Gm Test Results: 26 & 26
Minimum Good Value: 16
NOS Test Value: 24
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.
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.