TUNGSRAM ECC40 – MATCHED PAIR 2 PCS
GRADE: PLATINUM SERIES | VINTAGE NOS EUROPEAN SPEC
ECC40 Rimlock Dual Triode
Grey Plate
Top Ring Getter
New in White Box
AVO Type 160 Tested
Up for sale is a matched pair (2 pieces) of vintage Tungsram ECC40 dual triode vacuum tubes, brand new in protective white boxes. Featuring distinct yellow print, high-grade grey plates, and top ring getters on a classic Rimlock base, these European-made tubes are highly prized by audiophiles and vintage amplifier builders for their exceptional linearity, warm tone, and low microphonics in driver and preamplifier circuits.
As shown, both tubes have been thoroughly tested on our professional AVO Type 160 tube tester. Anode current (Ia) and mutual conductance (mA/V) measurements alongside percentage performance ratings relative to nominal specs are detailed in the table below.
| Serial No. | Triode Section | Anode Current (Ia) | Transconductance (mA/V) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ia | Ref Spec | Result | % Gm | ||
| S/N: 2411005 | T1 | 6.0 mA | 7.0 mA | 117% | 2.7 mA/V | 3.4 mA/V | 126% |
| T2 | 6.0 mA | 7.0 mA | 117% | 2.7 mA/V | 3.0 mA/V | 111% | |
| S/N: 2411004 | T1 | 6.0 mA | 8.5 mA | 142% | 2.7 mA/V | 3.4 mA/V | 126% |
| T2 | 6.0 mA | 8.5 mA | 142% | 2.7 mA/V | 3.4 mA/V | 126% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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