Brimar CV4035 / ECC83 — Matched Pair
MILITARY GRADE | GOLD PINS | MADE IN ENGLAND
Gold Pins
Ring Getter
Amplitrex Verified
Up for sale is a laboratory-verified matched pair of vintage Brimar CV4035 vacuum tubes. This is the premium, high-reliability military version of the ECC83 (12AX7), featuring Gold Pins and a Ring Getter. These units are New Old Stock (NOS) in their original vintage Government (GVT) boxes.
Tested on the Amplitrex AT1000, the results below follow the Percentage Method relative to original factory specifications (Ip = 1.2 mA / Gm = 1600 µMhos). Both tubes show extremely high emission and transconductance.
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 1520001 | T1 | 1.2 | 1.4 | 116.7% | 1600 | 1600 | 100.0% |
| T2 | 1.2 | 1.3 | 108.3% | 1600 | 1500 | 93.8% | |
| 1520002 | T1 | 1.2 | 1.6 | 133.3% | 1600 | 1700 | 106.3% |
| T2 | 1.2 | 1.3 | 108.3% | 1600 | 1600 | 100.0% |
⚠️ Note: Custom duties and taxes are the responsibility of the buyer in their country.
Support: [email protected] Precision Verified — NOS Audio Tubes
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