SIEMENS ECC83 / 12AX7 – MATCHED PAIR (2 PCS)
GRADE: PLATINUM SERIES | VINTAGE GERMAN
Siemens ECC83 / 12AX7 Equivalent
Grey Plate
Top Ring Getter
New in White Box
Amplitrex AT1000 Tested
Up for sale is a strong matched pair (2 Pcs) of vintage NOS Siemens ECC83 / 12AX7 dual triode vacuum tubes, packaged in white boxes. Precision-engineered in Germany, these highly sought-after audio tubes feature authentic grey plate , a top ring getter, and crisp original factory glass branding. Celebrated across audiophile and guitar amplifier circles for their exceptional air, tight bass response, outstanding detail retrieval, and ultra-low noise floor, Siemens ECC83 tubes are premier choices for preamplifiers and phono stages.
Both tubes have been tested on an Amplitrex AT1000 automated valve tester at nominal factory specs. Anode current (Ip) and Mutual Conductance (uMhos) measurements alongside percentage performance ratings relative to standard specs are detailed in the table below.
| Serial No. | Triode Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO. 1205028 | T1 | 1.2 mA | 1.2 mA | 100% | 1600 uMhos | 1800 uMhos | 113% |
| T2 | 1.2 mA | 1.0 mA | 83% | 1600 uMhos | 1800 uMhos | 113% | |
| SR.NO. 1205030 | T1 | 1.2 mA | 1.2 mA | 100% | 1600 uMhos | 1800 uMhos | 113% |
| T2 | 1.2 mA | 1.1 mA | 92% | 1600 uMhos | 1700 uMhos | 106% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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