SIEMENS ECC81 / 12AT7 — Matched Pair (2 Pcs)
Top Ring Getter
Laboratory Verified
Made in Germany
Laboratory Verified
Made in Germany
Top Ring Getter
Grey Plate Construction
Dual Triode
Amplitrex AT1000 Tested
Grey Plate Construction
Dual Triode
Amplitrex AT1000 Tested
Up for sale is a premium matched pair (2 Pcs) of Siemens ECC81 (12AT7) dual triode valves, Made in Germany. These units feature the classic Grey Plate internal structure and a Top Ring Getter. Siemens valves are highly regarded for their low noise floor, tight tolerances, and exceptional clarity in high-end audio applications.
This pair has been strictly screened on the Amplitrex AT1000 industrial tube analyzer. Percentages are calculated against the standard ECC81 factory specifications (Ip = 10.0 mAdc Gm = 5500 µMhos).
| Serial No. | Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 3437006 | T1 | 10.0 | 6.0 | 60% | 5500 | 4300 | 78% |
| T2 | 10.0 | 6.8 | 68% | 5500 | 4900 | 89% | |
| 3437009 | T1 | 10.0 | 6.6 | 66% | 5500 | 4500 | 81% |
| T2 | 10.0 | 7.0 | 70% | 5500 | 4750 | 86% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
Support: [email protected] Precision Verified — NOS Audio Tubes
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