Mullard ECC82 — Long Grey Plate Pair
BRITISH MADE | TOP RING GETTER | PRECISION MATCHED
Long Grey Plate
Top Ring Getter
Amplitrex Verified
Up for sale is a matched pair of vintage Mullard ECC82 (12AU7) tubes. These are the desirable Long Grey Plate versions, manufactured in Great Britain. Known for their expansive soundstage and smooth, musical midrange, these tubes are the perfect upgrade for any high-end audio preamplifier or driver stage.
This pair has been precision tested on the Amplitrex AT1000 digital laboratory tester. The results follow the Percentage Method against original factory design-center specifications (Ip = 10.5 mA / Gm = 2200 µMhos). Both tubes test with strong mutual conductance, ensuring reliable performance and a long service life.
| Sr. No. | Test Triode – T1/T2 | Parameter 1p mAdc | Result 1p mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| #787017 | Triode 1 | 10.5 | 8.0 | 76.1% | 2200 | 2000 | 90.9% |
| Triode 2 | 10.5 | 8.8 | 83.8% | 2200 | 2100 | 95.4% | |
| #787020 | Triode 1 | 10.5 | 8.4 | 80.0% | 2200 | 2000 | 90.9% |
| Triode 2 | 10.5 | 12.0 | 114.2% | 2200 | 2200 | 100.0% |
⚠️ Note: Custom duties and taxes are the responsibility of the buyer. Extended area surcharges may apply to remote locations—please confirm before checkout.
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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