BRIMAR CV4003 / 12AU7 — Matched Pair
GRADE: GOLD SERIES | LABORATORY VERIFIED | NOS/VINTAGE STOCK
Top Ring Getter
Amplitrex AT1000 Digital Testing
This listing features a high-reliability matched pair of vintage Brimar CV4003 dual triodes. These military-grade valves utilize a Grey Plate and Top Ring Getter construction, providing the superior mechanical stability and tonal balance required for critical audio applications.
Both tubes have been laboratory-verified on the Amplitrex AT1000 digital tester. Using our Percentage Method, the test results below show the performance of each triode section against the 100% factory design-center specifications (Ip = 10.5mA / Gm = 2200 µMhos).
| Serial No. | Side | Param Ip | Result Ip | % Ip | Param Gm | Result Gm | % Gm |
|---|---|---|---|---|---|---|---|
| #807169 | T1 | 10.5 | 12.0 | 114% | 2200 | 2300 | 105% |
| T2 | 10.5 | 10.0 | 95% | 2200 | 2100 | 95% | |
| #807107 | T1 | 10.5 | 11.4 | 109% | 2200 | 2300 | 105% |
| T2 | 10.5 | 10.2 | 97% | 2200 | 2100 | 95% |
NOTE : WE HAVE MORE THAN 100 PCS
Note: Custom Duties and Taxes are the Responsibility of the Buyer in their Country
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