PHILIPS-MINIWATT ECC81 — Matched Pair
Laboratory Verified
Made in Holland
Black Plate
NOS
Amplitrex AT1000 Verified
Up for Sale is a matched pair of 2 pieces of premium Philips-Miniwatt ECC81 dual triode tubes, masterfully crafted in Holland. These tubes feature the iconic Top Ring Getter & Black Plate and are highly sought after for their lush, detailed European sonic profile.
Each tube has been professionally analyzed on the Amplitrex AT1000. These specimens exhibit high emission and strong transconductance across all triode sections, making them a perfect upgrade for high-end preamplifiers and phase-inverter stages.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 2445003 | (T1) | 10.0 | 11.6 | 116% | 5500 | 6100 | 111% |
| (T2) | 10.0 | 12.4 | 124% | 5500 | 6500 | 118% | |
| 2445004 | (T1) | 10.0 | 11.2 | 112% | 5500 | 6020 | 109% |
| (T2) | 10.0 | 12.2 | 122% | 5500 | 6300 | 115% |
Technical Note: Percentage calculations are based on standard NOS factory specifications for the ECC81/12AT7 (10.0mA for Ip and 5,500 uMhos for Gm). This pair represents high-performance vintage NOS stock.
⚠️ Note: Custom duties and taxes are the responsibility of the buyer in their country.
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