BRIMAR CV4003 / 6189 — Premium Matched Pair
New in white box
Made in England
Top Ring Getter
Military Specification (KB/AD)
Amplitrex AT1000 Tested
Offered for sale is a superb matched pair of Brimar CV4003 / 6189 dual triodes, a ruggedized, high-reliability military version of the 12AU7WA. These valves feature the desirable grey plates and top ring getters, widely regarded for their exceptional detail and warm tonal character in high-end audio applications.
Both tubes are in NOS (New Old Stock) condition and were manufactured in England. This pair has been meticulously verified on the Amplitrex AT1000 digital tube tester to ensure strong emission and balanced triode sections.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 1058005 | Triode 1 | 10.5 | 9.2 | 87.6% | 2200 | 2100 | 95.4% |
| Triode 2 | 10.5 | 9.5 | 90.4% | 2200 | 2100 | 95.4% | |
| 1058009 | Triode 1 | 10.5 | 9.6 | 91.4% | 2200 | 2100 | 95.4% |
| Triode 2 | 10.5 | 9.8 | 93.3% | 2200 | 2100 | 95.4% |
About NOS Audio Tubes
Based in Mumbai, India, we are specialist suppliers of high-quality vintage vacuum tubes. With an inventory of approximately 300,000 valves, we serve the global audiophile and professional restoration community with laboratory-tested components.
Note: Custom Duties and Taxes are the Responsibility of the Buyer in their Country
Whatsapp: +1 (630) 597-3966
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