GE 5687WA – SINGLE TUBE (1 PC)
Black Plate
Top Ring Getter
Military Spec (5687WA)
Dual Triode 5687
New in White Box
Amplitrex AT1000 Tested
Up for sale is a premium vintage NOS General Electric (GE) 5687WA dual triode vacuum tube, manufactured in the USA and supplied in a white box. Highly prized by audiophiles for its exceptionally rugged construction and rich audio dynamics, this military-spec tube features black plates and a top ring getter structure. An excellent choice for high-end preamplifiers, driver stages, and headphone amplifiers requiring 5687 / 5687WA dual triodes.
This tube has been fully tested on a precision Amplitrex AT1000 tube tester. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs (Reference: 12.0 mA / 5,400 uMhos) are detailed in the table below.
| Serial No. | Triode Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO.3024001 | Triode 1 (T1) | 12.0 mA | 10.6 mA | 88% | 5400 | 4600 | 85% |
| Triode 2 (T2) | 12.0 mA | 9.0 mA | 75% | 5400 | 4500 | 83% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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