Silver Grade tubes are matched within 15%, Gold Grade tubes within 10% and Platinum Plus Grade 1%. You are purchasing a “Platinum Grade ” matched pair of tubes. The price listed is for one pair of tubes.
Item Tag: SYLVANIA
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1959 Sylvania 12AU7 PLATINUM PLUS GRADE Preamp Tubes Matched Pair 100% NOS ECC82
Silver Grade tubes are matched within 15%, Gold Grade tubes within 10% and Platinum Grade 1%. You are purchasing a “Platinum PLUS Grade ” matched pair of tubes. The price listed is for one pair of tubes.
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Quad Set (4) TESTED STRONG Sylvania 1960 12AU7 / ECC82 Long Plate Preamp Tubes
You are buying a set of four tubes.
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1958 Sylvania 12AU7 PLATINUM PLUS GRADE D Getter Preamp Tubes Matched Pair ECC82
***** EVERYTHING WE SELL IS GUARANTEED 100% AUTHENTIC *****All tubes come with a full 30 day, unconditional, no questions asked, money back satisfaction guarantee!Test scores will average between 85% and 95% of NOS values. Individual test scores will be written on the boxes that you receive with your tubes. These tubes were carefully screened by the manufacturers (Baldwin, Allen, Conn, Hammond, Wurlitzer etc.) and specially selected for their low noise and microphonic characteristics.You are purchasing a “Platinum Plus” grade matched pair of tubes. This means that the plates are very tightly matched on a calibrated Hickok TV-7 or Hickok 799 within 1%. Please see our other listings for “Silver, Gold and Platinum” tubes. Silver Grade tubes are matched within 15%, Gold Grade tubes within 10% and Platinum Grade 5%. The Gold and Platinum Grade tubes are recommended for more critical applications such as your preamp and phono stage.The price listed is for one pair of tubes. To purchase more than one pair, when available, simply change the number in the quantity box which is located just below the advertised price. Please email with any questions and/or concerns.Thank you for viewing my listings.
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4 Sylvania 12SN7GT 3-hole bad-boy tubes TV7 & AT1000 test good used
4 Sylvania 12SN7GT 3-hole bad-boy tubes. on anAmplitrex AT1000 in fixed bias mode. AT1000 test results Good used testing and great sounding tubes. Tubes ran-in 5 min ea. before tests to ensure stability.
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NOS NIB Sylvania JAN 6189W/12AU7WA Matched Pair 10K Preamp Tubes Case Fresh
The price listed is for 2 tubes.
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(2) Sylvania 12AX7A ECC83 Preamp Tubes Gray Plates O Getters Tests NOS Amplitrex
(2) Sylvania 12AX7A ECC83 Preamp Tubes | Gray Plates | O Getters. Tested on an Amplitrex AT1000.
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Sylvania JAN CHS 6SL7GT VT-229 Bad Boy NOS 1952 – 51 Matched Pair
Excellent pair 1951 and 1952 Sylvania CHS 6SL7GT preamp tubes. Min good value is 32 for these tubes.
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NOS JAN Sylvania 5814A Code-Matched Quad 10-74 Platinum Matched Low Noise
These are closely matched for both gain/mu and mA/V transconductance, with very strong low-noise results. This quad is very tightly matched on mA/V, with all sections testing between 1.50 and 1.54 mA/V.