TELEFUNKEN ECC83 / 12AX7 – SINGLE TUBE 1PC
GRADE: PLATINUM SERIES | LABORATORY VERIFIED NOS MILITARY SPEC
Grey Plate Construction
Top Ring Getter
Clear Glass
New in White Box
Amplitrex AT1000 Tested
Up for sale is 1 piece vintage Telefunken TFK ECC83 /12AX7 dual triode preamplifier tube, brand new in white box. Made in Germany, this iconic audio tube features classic grey plate internal construction, a top ring getter, and clear glass. Legendary for its pristine transparency, incredible detail retrieval, and ultra-quiet background in high-end audio preamplifiers.
As shown in , the tube has been thoroughly tested on our laboratory-grade Amplitrex AT1000 tester. The measured plate current (Ip) and transconductance (uMhos) results are calculated against standard factory specifications (1.2 mA / 1600 uMhos) and detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Transconductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Factory Spec | Result | % Ip | Factory Spec | Result | % Gm | ||
| SR: 1671012 | T1 | 1.2 mA | 1.2 mA | 100% | 1600 uMhos | 1600 uMhos | 100% |
| T2 | 1.2 mA | 1.3 mA | 108% | 1600 uMhos | 1700 uMhos | 106% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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