FUNKWERK ERFURT ECC82/12AU7 – SINGLE TUBE (1 PC)
GRADE: GOLD SERIES | VINTAGE GERMAN MEDIUM-MU DUAL TRIODE
ECC82 / 12AU7 Dual Triode
Grey Plates
Top Ring Getter
New in White Box
Amplitrex AT1000 Tested
Up for sale is a single piece (1 PC) of authentic vintage Funkwerk Erfurt ECC82 (12AU7) dual triode vacuum tube, packed in a protective white box. Manufactured in Germany (RFT / Funkwerk Erfurt), this rare tube features smooth grey plates, a ring getter, and distinct gold glass print. Esteemed by audiophiles for its warm tone, rich harmonics, low noise, and excellent audio fidelity in preamplifiers and driver stages.
As shown, the tube has been precisely tested on an advanced Amplitrex AT1000 tube testing system operating in full fixed-bias mode. Plate current (Ip) and mutual conductance (Gm) measurements alongside percentage performance ratings relative to nominal factory specs are detailed in the table below.
| Serial No. | Triode Section | Plate Current (Ip) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % Gm | ||
| SR.NO. 260001 | Triode 1 (T1) | 10.5 mA | 8.4 mA | 80% | 2200 µMhos | 1410 µMhos | 64% |
| Triode 2 (T2) | 10.5 mA | 11.8 mA | 112% | 2200 µMhos | 2200 µMhos | 100% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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