SYLVANIA 5751WA – SINGLE (1 PC)
GRADE: GOLD SERIES | VINTAGE USA MANUFACTURE
Sylvania Vintage Military Spec
5751WA / 12AX7 Sub Class
Black Plate
Top Square Getter
Triple Mica Construction
New in White Box
Amplitrex AT1000 Tested
Up for sale is a premium single (1 Pc) vintage NOS Sylvania 5751WA ruggedized military-spec high-mu dual triode audio tube, packed in a white box. Manufactured in the USA, this highly sought-after military valve features heavy-duty black plate construction paired with a iconic top square getter. Highly prized in audiophile circles for its exceptional mechanical stability, ultra-low microphonics, detailed resolution, and sweet, natural tonal balance in 12AX7 amplifier positions.
This tube has been tested on an Amplitrex AT1000 automated valve tester at nominal reference settings. Plate Current (Ip) and Transconductance (uMhos) measurements alongside percentage performance ratings relative to standard factory specs are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Transconductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % Gm | ||
| SR.NO. 5395002 | Triode 1 | 1.0 mA | 0.6 mA | 60% | 1200 uMhos | 900 uMhos | 75% |
| Triode 2 | 1.0 mA | 0.8 mA | 80% | 1200 uMhos | 1000 uMhos | 83% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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