MULLARD ECC81 / 12AT7 — Vintage Made in Great Britain
Laboratory Verified
Made in Great Britain
Made in Great Britain
Top Square Getter
Grey Plates
Dual Mica Support
Amplitrex AT1000 Tested
Grey Plates
Dual Mica Support
Amplitrex AT1000 Tested
Presenting a premium matched pair of Mullard ECC81 / 12AT7 vacuum tubes, professionally manufactured in Great Britain. These highly desirable specimens feature the iconic Top Square Getter and Gray Plate construction.
Both tubes have been tested on the Amplitrex AT1000 digital laboratory tester.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 3417123 | Section 1 (T1) | 10.0 | 4.4 | 4.4% | 5500 | 2900 | 52.7% |
| Section 2 (T2) | 10.0 | 7.0 | 70% | 5500 | 4190 | 96.3% | |
| 3417122 | Section 1 (T1) | 10.0 | 5.1 | 51% | 5500 | 2970 | 76% |
| Section 2 (T2) | 10.0 | 6.6 | 66% | 5500 | 4100 | 74.5% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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Precision Verified — NOS Audio Tubes
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