Mullard ECC81 (12AT7) NOS Matched Pair
NOS Matched Pair
New In White Box
Double Mica
Short Grey Plate
New In White Box
Double Mica
Short Grey Plate
Offering a laboratory-matched pair of 2 pcs Mullard ECC81 (12AT7) dual triodes, Serial Nos. 1983015 and 1983001. These premium Made in Great Britain (BVA) valves feature the highly sought-after Short Grey Plate construction, Double Mica spacers for reduced microphonics, and a “D” Getter. Both tubes are New Old Stock (NOS) in clean white boxes and have been fully tested on the Amplitrex AT1000 Digital Tube Tester.
- Type: ECC81 / 12AT7 Brand: Mullard
- Condition: NOS in White Boxes Construction: Double Mica / “D” Getter
- Origin: Made in Great Britain Testing: Amplitrex AT1000
High Performance Screening: Tested against reference parameters (Ip=10.0, Gm=5500) for the ECC81 series.
Amplitrex Characterized: These tubes exhibit balanced transconductance and gain across both triode sections, ideal for phase inverter or preamp stages.
Amplitrex Characterized: These tubes exhibit balanced transconductance and gain across both triode sections, ideal for phase inverter or preamp stages.
⚠️ International Buyers: Custom duties and taxes are the responsibility of the buyer in their country.
| Sr. No. | Test Triode | Parameter Ip (mA) | Result Ip (mA) | Percentage Ip | Parameter Gm (uMhos) | Result Gm (uMhos) | Percentage Gm |
|---|---|---|---|---|---|---|---|
| 1983015 | T1 | 10.0 | 8.1 | 81% | 5500 | 4200 | 76% |
| T2 | 10.0 | 7.8 | 78% | 5500 | 4070 | 74% | |
| 1983001 | T1 | 10.0 | 7.0 | 70% | 5500 | 4100 | 75% |
| T2 | 10.0 | 8.8 | 88% | 5500 | 4500 | 82% |
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