Telefunken ECC83 / 12AX7
MATCHED PAIR | DIAMOND BOTTOM | MADE IN GERMANY
GENUINE DIAMOND BOTTOM
WEST GERMANY
MATCHED PAIR
AMPLITREX VERIFIED
WEST GERMANY
MATCHED PAIR
AMPLITREX VERIFIED
Up for sale is a premium matched pair of vintage Telefunken ECC83 vacuum tubes. These are the legendary Diamond Bottom versions, manufactured in West Germany. Known for their incredible transparency and holographic soundstage, these are among the most sought-after preamp tubes ever produced.
This pair has been precision tested on the Amplitrex AT1000 digital laboratory tester. The data below is presented using the Percentage Method against original factory design-center specifications (Ip = 1.2 mA / Gm = 1600 µMhos).
| Serial No. | Section | Param Ip | Result Ip | % Ip (Emission) | Param Gm | Result Gm | % Gm (Transc.) |
|---|---|---|---|---|---|---|---|
| #852011 | Triode 1 | 1.2 | 0.9 | 75.0% | 1600 | 1500 | 93.8% |
| Triode 2 | 1.2 | 1.4 | 116.7% | 1600 | 1800 | 112.5% | |
| #1448014 | Triode 1 | 1.2 | 0.8 | 66.7% | 1600 | 1500 | 93.8% |
| Triode 2 | 1.2 | 1.4 | 116.7% | 1600 | 1800 | 112.5% |
Note: Custom duties and taxes are the buyer’s responsibility
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