Mullard ECC83 / 12AX7
MATCHED PAIR | BLACKBURN, GREAT BRITAIN | “D” GETTER
BLACKBURN PLANT (B)
COPPER POSTS
“D” GETTER
AMPLITREX AT1000
COPPER POSTS
“D” GETTER
AMPLITREX AT1000
Up for sale is a premium matched pair of vintage Mullard ECC83 preamp tubes. These are highly desirable units from the legendary Blackburn plant in England, featuring Copper Posts and the early “D” Getter construction. Mullard tubes are world-famous for their lush, warm midrange and smooth harmonic response.
Precision screened on our Amplitrex AT1000 digital laboratory tester, the results below utilize the Percentage Method against original factory design-center specifications (Ip = 1.2 mA / Gm = 1600 µMhos).
| Serial No. | Section | Parameter Ip | Result Ip | % Ip | Parameter Gm | Result Gm | % Gm |
|---|---|---|---|---|---|---|---|
| #1073001 | Triode 1 | 1.2 | 1.2 | 100.0% | 1600 | 970 | 60.6% |
| Triode 2 | 1.2 | 0.9 | 75.0% | 1600 | 1200 | 75.0% | |
| #1192002 | Triode 1 | 1.2 | 0.9 | 75.0% | 1600 | 1000 | 62.5% |
| Triode 2 | 1.2 | 1.1 | 91.7% | 1600 | 1300 | 81.3% |
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
NOS Audio Tubes — Precision Quality Since 1970
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