Mullard ECC81/12AT7 NOS Matched Quad – Grey Ribbed Plate British Made
NOS Matched Quad
New In White Box
Ring Getter
Grey Ribbed Plate
New In White Box
Ring Getter
Grey Ribbed Plate
Available for purchase is a premium matched quad of 4 pcs Mullard ECC81 / 12AT7 dual triodes. These authentic British Made valves feature the desirable Grey Ribbed Plate construction and Ring Getter design. Each unit is in New Old Stock (NOS) condition and is supplied in a white box with detailed Amplitrex AT1000 laboratory test results.
- Type: ECC81 / 12AT7 Brand: Mullard
- Condition: New in White Boxes Construction: Grey Ribbed Plate / Ring Getter
- Origin: Made in Great Britain Testing: Amplitrex AT1000
Collector Quality: Tubes feature the iconic BVA (British Valve Association) logo, representing high industrial screening standards.
Amplitrex Screened: Meticulously tested for plate current (Ip) and transconductance (Gm) against factory targets.
Amplitrex Screened: Meticulously tested for plate current (Ip) and transconductance (Gm) against factory targets.
⚠️ 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 |
|---|---|---|---|---|---|---|---|
| 3675017 | T1 | 10.0 | 9.4 | 94% | 5500 | 5400 | 98% |
| T2 | 10.0 | 9.4 | 94% | 5500 | 5290 | 96% | |
| 3675019 | T1 | 10.0 | 9.0 | 90% | 5500 | 5260 | 95% |
| T2 | 10.0 | 7.7 | 77% | 5500 | 5020 | 91% | |
| 3675015 | T1 | 10.0 | 7.2 | 72% | 5500 | 5000 | 90% |
| T2 | 10.0 | 8.8 | 88% | 5500 | 5420 | 98% | |
| 3675031 | T1 | 10.0 | 10.1 | 101% | 5500 | 5010 | 91% |
| T2 | 10.0 | 8.2 | 82% | 5500 | 5200 | 94% |
✉️ For technical inquiries, please Email us
Whatsapp: +1 (630) 597-3966
![Lot 100pcs.NOS NIB 7193 [2C22] RCA Made In U.S.A. Black Rods Support](https://i0.wp.com/www.nosaudiotubes.com/wp-content/uploads/2023/01/7193-03.jpg?resize=250%2C188&ssl=1)
Reviews
There are no reviews yet