Telefunken ECC82 / 12AU7
DIAMOND BOTTOM | LONG PLAIN PLATE | MADE IN GERMANY | MATCHED PAIR
Diamond Bottom
Long Plain Plate
Up for sale is a matched pair (2 pieces) of legendary Telefunken ECC82 / 12AU7 vacuum tubes. These are the authentic Diamond Bottom versions, featuring Long Plain Gray Plates and a Top Ring Getter. Known for their surgical precision and unmatched transparency, Telefunken tubes are the ultimate choice for critical listening in high-end audio systems.
Precision tested on our Amplitrex AT1000 digital laboratory system, the results below utilize the Percentage Method against original factory design-center specifications (Ip = 10.5 mA / Gm = 2200 µMhos).
| Serial No. | Test Triode | Parameter ip mAdc | Result ip mAdc | % Ip Emission | Parameter Gm uMhos | Result Gm uMhos | % Gm Transc |
|---|---|---|---|---|---|---|---|
| 2338015 | T1 | 10.5 | 9.0 | 85.7% | 2200 | 2000 | 90.9% |
| T2 | 10.5 | 9.6 | 91.4% | 2200 | 2000 | 90.9% | |
| 2338010 | T1 | 10.5 | 9.4 | 89.5% | 2200 | 2300 | 104.5% |
| T2 | 10.5 | 6.8 | 64.8% | 2200 | 2160 | 98.2% |
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
Note: Extended area surcharges may apply for remote addresses; please confirm before checkout.
Quality Verified Since 1970
Specializing in thoroughly tested and screened quality vacuum tubes.
Testing equipment includes Amplitrex AT1000, Hickok 752a, and AVO Type 160.
Support: [email protected] Precision Verified — NOS Audio Tubes
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