Mullard ECC82 — Super-Spec Matched Pair
MADE IN GREAT BRITAIN | LONG GREY PLATE | TOP RING GETTER
Long Grey Plate
Top Ring Getter
Amplitrex Verified
Up for sale is an extraordinary matched pair of vintage Mullard ECC82 (12AU7) tubes. These feature the rare Long Grey Plate and Top Ring Getter construction, synonymous with the premium era of British valve manufacturing. This specific pair tests exceptionally strong, with transconductance levels reaching up to 109% of original factory specs.
Precision matched and screened 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). This is an investment-grade set ready for critical audio use.
| Sr. No. | Test Triode – T1/T2 | Parametre 1p mAdc | Result 1p mAdc | % Ip | Parameter 1p mAdc | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| #3433005 | Triode 1 | 10.5 | 10.4 | 99.0% | 2200 | 2300 | 104.5% |
| Triode 2 | 10.5 | 10.4 | 99.0% | 2200 | 2400 | 109.1% | |
| #3433009 | Triode 1 | 10.5 | 10.0 | 95.2% | 2200 | 2330 | 105.9% |
| Triode 2 | 10.5 | 10.6 | 100.9% | 2200 | 2400 | 109.1% |
⚠️ 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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