MULLARD ECC81 – MATCHED PAIR 2 PCS
GRADE: GOLD SERIES | VINTAGE BRITISH HIGH-MU DUAL TRIODE
ECC81 / 12AT7 Dual Triode
3-Hole Plate
Top Square Getter
BVA Marked
New in White Box
Amplitrex AT1000 Tested
Up for sale is a strong pair (2 pieces) of authentic vintage Mullard ECC81 /12AT7 dual triode vacuum tubes, packed in protective white boxes. Made in Great Britain, these desirable early production tubes feature classic 3-hole plates, a top square getter, clear BVA glass branding, and legendary British manufacture. Revered by audiophiles worldwide for their musical warmth, rich midrange, low noise floor, and excellent dynamic headroom.As shown, both tubes have been precisely tested on an advanced Amplitrex AT1000 tube testing system operating in full fixed-bias mode. Plate current (Ip) and mutual conductance (Gm) measurements alongside percentage performance ratings relative to nominal factory specs are detailed in the table below.
| Serial No. | Triode Section | Plate Current (Ip) | Transconductance (Gm) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % Gm | ||
| SR.NO. 3517083 | T1 | 10.0 mA | 7.4 mA | 74% | 5500 µMhos | 4910 µMhos | 89% |
| T2 | 10.0 mA | 8.0 mA | 80% | 5500 µMhos | 5000 µMhos | 91% | |
| SR.NO. 3517064 | T1 | 10.0 mA | 7.6 mA | 76% | 5500 µMhos | 4920 µMhos | 89% |
| T2 | 10.0 mA | 8.2 mA | 82% | 5500 µMhos | 5120 µMhos | 93% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
Note: We have more than 100 Pcs
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