Telefunken ECC81/12AT7 NOS Matched Quad
NOS
Matched Quad
Double Rib Plate
Made in Germany
Matched Quad
Double Rib Plate
Made in Germany
Available for purchase is a premium matched quad of Telefunken ECC81 vacuum tubes. These world-renowned German tubes feature the highly regarded Double Rib Plate construction, known for exceptional low-noise performance and sonic transparency. All four units are New Old Stock (NOS) and are supplied in clean white boxes.
- Type: ECC81 / 12AT7 Brand: Telefunken
- Condition: New in White Boxes Construction: Double Rib Plate
- Origin: Made in Germany Testing: Amplitrex AT1000
German Excellence: Authentic Telefunken production featuring the famous diamond mark on the bottom and clear “MADE IN GERMANY” etchings.
Precision Testing: Fully laboratory screened on the Amplitrex AT1000 for Plate Current (Ip) and Transconductance (Gm) against factory bogey specs.
Precision Testing: Fully laboratory screened on the Amplitrex AT1000 for Plate Current (Ip) and Transconductance (Gm) against factory bogey specs.
⚠️ 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 |
|---|---|---|---|---|---|---|---|
| 1972013 | T1 | 10.0 | 8.8 | 88.00% | 5500 | 4890 | 88.91% |
| T2 | 10.0 | 8.6 | 86.00% | 5500 | 4890 | 88.91% | |
| 1972067 | T1 | 10.0 | 8.2 | 82.00% | 5500 | 4900 | 89.09% |
| T2 | 10.0 | 9.0 | 90.00% | 5500 | 5270 | 95.82% | |
| 1972051 | T1 | 10.0 | 7.6 | 76.00% | 5500 | 4800 | 87.27% |
| T2 | 10.0 | 8.2 | 82.00% | 5500 | 4770 | 86.73% | |
| 1972089 | T1 | 10.0 | 7.2 | 72.00% | 5500 | 4660 | 84.73% |
| T2 | 10.0 | 7.8 | 78.00% | 5500 | 4850 | 88.18% |
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