SIEMENS E88CC / 6922 – MATCHED QUAD 4 PCS
GRADE: PLATINUM SERIES | VINTAGE NOS WEST GERMAN SPEC
Gold Pins
Grey Plate
Top Ring Getter
E88CC / 6922 Premium Dual Triode
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched quad (4 pieces) of vintage Siemens E88CC / 6922 premium low-noise dual triodes, brand new in white boxes. Made in West Germany, these highly collectible audio tubes feature internal grey plates, top ring getters, and corrosion-resistant gold pins. Renowned in high-end audio for their ultra-transparent soundstage, superb top-end extension, and legendary West German engineering precision.
As shown, all four tubes have been thoroughly tested on a laboratory-grade Amplitrex AT1000 tube tester. Plate current (Ip) and transconductance (uMhos) measurements alongside percentage performance ratings relative to nominal specs are detailed in the table below.
| Serial No. | Section | Plate Current (Ip) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Factory Spec | Result | % Ip | Factory Spec | Result | % Gm | ||
| SR.NO. 4595065 | T1 | 15.0 mA | 23.4 mA | 156% | 12,500 µMhos | 14,870 µMhos | 119% |
| T2 | 15.0 mA | 25.0 mA | 167% | 12,500 µMhos | 14,760 µMhos | 118% | |
| SR.NO. 4595049 | T1 | 15.0 mA | 20.8 mA | 139% | 12,500 µMhos | 14,300 µMhos | 114% |
| T2 | 15.0 mA | 19.0 mA | 127% | 12,500 µMhos | 14,400 µMhos | 115% | |
| SR.NO. 4595034 | T1 | 15.0 mA | 17.2 mA | 115% | 12,500 µMhos | 14,410 µMhos | 115% |
| T2 | 15.0 mA | 18.4 mA | 123% | 12,500 µMhos | 14,700 µMhos | 118% | |
| SR.NO. 4595047 | T1 | 15.0 mA | 16.2 mA | 108% | 12,500 µMhos | 14,000 µMhos | 112% |
| T2 | 15.0 mA | 15.6 mA | 104% | 12,500 µMhos | 13,800 µMhos | 110% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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