Siemens ECC81 (12AT7) NOS Matched Pair – Grey Ribbed Plate Top Ring Getter
NOS Matched Pair
New In White Box
Grey Ribbed Plate
Top Ring Getter
New In White Box
Grey Ribbed Plate
Top Ring Getter
Offering a laboratory-matched pair of 2 pcs Siemens ECC81 (12AT7) dual triodes, Serial Nos. 2072004 and 2072009. These premium Made in Germany valves feature high-stability Grey Ribbed Plates and a Top Ring Getter. Both tubes are New Old Stock (NOS) in clean white boxes and have been fully characterized on the Amplitrex AT1000 Digital Tube Tester.
- Type: ECC81 / 12AT7 Brand: Siemens
- Condition: New in White Boxes Construction: Grey Ribbed Plate / Ring Getter
- Origin: Made in Germany Testing: Amplitrex AT1000
Laboratory Characterization: These tubes were screened against reference parameters .
Performance: Both valves exhibit strong emission and transconductance, making them an excellent choice for high-fidelity audio amplification.
Performance: Both valves exhibit strong emission and transconductance, making them an excellent choice for high-fidelity audio amplification.
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
| Sr. No. | Test Triode | Parameter Ip (mA) | Result Ip (mA) | Percentage Ip | Parameter Gm (uMhos) | Result Gm (uMhos) | Percentage Gm |
|---|---|---|---|---|---|---|---|
| 2072004 | T1 | 10.0 | 9.4 | 94% | 5500 | 5300 | 96% |
| T2 | 10.0 | 10.6 | 106% | 5500 | 5600 | 102% | |
| 2072009 | T1 | 10.0 | 11.8 | 118% | 5500 | 5800 | 105% |
| T2 | 10.0 | 9.8 | 98% | 5500 | 5000 | 91% |
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