Mullard ECC83 — Matched Pair
VINTAGE Gt. BRITAIN | BLACK PLATE | TOP RING GETTER
Rare Black Plate
Matched Pair
Amplitrex Verified
Available for purchase is a premium matched pair of vintage Mullard ECC83 (12AX7) tubes. Manufactured in Great Britain, these feature the highly coveted Black Plate construction and Top Ring Getters, delivering the legendary “Mullard sound” characterized by harmonic depth and absolute clarity.
These tubes have been precision tested on the Amplitrex AT1000. The results below are provided via the Percentage Method against factory design-center specs (Ip = 1.2 mA / Gm = 1600 µMhos). Both units are supplied in clean white boxes.
| Serial No. | Test Triode – T1/T2 | Parameter 1p mAdc | Result 1p mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| #233794 | Triode 1 | 1.2 | 0.9 | 75.0% | 1600 | 1500 | 93.7% |
| Triode 2 | 1.2 | 0.8 | 66.6% | 1600 | 1400 | 87.5% | |
| #1667066 | Triode 1 | 1.2 | 1.1 | 91.6% | 1600 | 1500 | 93.7% |
| Triode 2 | 1.2 | 0.9 | 75.0% | 1600 | 1430 | 89.3% |
⚠️ Note: Custom duties and taxes are the responsibility of the buyer in their country.
Support: [email protected] Precision Verified — NOS Audio Tubes
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