Mullard ECC81/12AT7 – Matched Pair
Matched Pair
New In White Box
Short Grey Plate
Top Ring Getter
New In White Box
Short Grey Plate
Top Ring Getter
Offering a laboratory-matched pair of 2 pcs Mullard ECC81 (12AT7) dual triodes, Serial Nos. 1979007 and 1979005. These Made in Great Britain valves feature Short Grey Plates, Double Mica construction, and Top Ring Getters. Both units carry the 1967 Blackburn factory production codes KT3 B7C3 and are New in white boxes.
- Type: ECC81 / 12AT7 Brand: Mullard
- Condition: New in White Boxes Date Code: KT3 B7C3 (Blackburn)
- Origin: Made in Great Britain Testing: Amplitrex AT1000
Laboratory Characterization: Tested against reference parameters (Ip=10.0, Gm=5500) for the ECC81 series.
Performance: Both valves exhibit exceptionally strong and balanced results across all triode sections.
Performance: Both valves exhibit exceptionally strong and balanced results across all triode sections.
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
| Sr. No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | Percentage Ip | Parameter Gm uMhos | Result Gm uMhos | Percentage Gm |
|---|---|---|---|---|---|---|---|
| 1979007 | T1 | 10.0 | 9.4 | 94% | 5500 | 5300 | 96% |
| T2 | 10.0 | 9.4 | 94% | 5500 | 5270 | 96% | |
| 1979005 | T1 | 10.0 | 8.8 | 88% | 5500 | 5230 | 95% |
| T2 | 10.0 | 8.9 | 89% | 5500 | 5160 | 94% |
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