GE 5687WA Matched Pair – Black Plate / Ring Getter / USA Made / Chelmer Box
Gold Series
Black Plate Construction
USA Made
Ring Getter
Black Plate Construction
USA Made
Ring Getter
Offering a superb Matched Pair of GE 5687WA dual triode vacuum tubes. This military-grade, premium variant features classic Black Plates and a reliable Ring Getter structure. Renowned for their high driver authority, dynamic soundstage, and rugged durability in high-end audio preamps and driver stages, these are New Old Stock (NOS) in original Chelmer boxes and have been laboratory tested on the Amplitrex AT1000.
- Type: 5687WA Brand: General Electric (GE)
- Condition: New in Chelmer Box Construction: Black Plate / Ring Getter
- Origin: Made in USA Testing: Amplitrex AT1000
Key Features & Highlights
- Black Plate Construction: High-grade internal anode structure offering rich tonal balance and outstanding linearity.
- Military-Grade (WA): Ruggedized military specification for ultra-low microphonics and long operational life.
- Matched Pair: Laboratory tested and matched across all triodes on an Amplitrex AT1000 for balanced stereo operation.
- Original GVT Boxes: Preserved in original military/government surplus packaging.
| Sr. No. | Test Triode | Parameter Ip (mAdc) | Result Ip (mAdc) | % Ip | Param Gm (uMhos) | Result Gm (uMhos) | % Gm |
|---|---|---|---|---|---|---|---|
| 5285004 | T1 | 12.0 | 6.5 | 54.2% | 5400 | 4000 | 74.1% |
| T2 | 12.0 | 7.0 | 58.3% | 5400 | 4110 | 76.1% | |
| 5285006 | T1 | 12.0 | 6.4 | 53.3% | 5400 | 3900 | 72.2% |
| T2 | 12.0 | 7.6 | 63.3% | 5400 | 4000 | 74.1% |
Note: Custom duties and taxes are the responsibility of the buyer in their respective country.
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