EDISWAN ECC83/12AX7 – SINGLE TUBE
GRADE: PLATINUM SERIES | VINTAGE BRITISH HIGH-MU DUAL TRIODE
ECC83 / 12AX7 High-Mu Dual Triode
Black Plates
Top Ring Getter
New in White Box
Amplitrex AT1000 Tested
Up for sale is a single piece (1 PC) of authentic vintage Ediswan ECC83 (12AX7) dual triode vacuum tube, packed in a white box. Manufactured in England, this rare early-production valve features classic black plates, a top ring getter, and crisp Ediswan Valve printing. Highly regarded among audiophiles and vintage audio collectors for its exceptional British warmth, detailed musical response, low noise, and strong signal performance in Hi-Fi preamplifiers and phono stages.
As shown, the tube has been thoroughly tested on an advanced Amplitrex AT1000 tube testing system 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. 4665001 | Triode 1 (T1) | 1.2 mA | 2.1 mA | 175% | 1600 µMhos | 2220 µMhos | 139% |
| Triode 2 (T2) | 1.2 mA | 1.9 mA | 158% | 1600 µMhos | 2200 µMhos | 138% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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