Brimar CV4068 / 13D3 — NOS Matched Pair (Made in England)
Long Black Plate
Big Ring Getter
NOS in Box
Special Quality
Big Ring Getter
NOS in Box
Special Quality
Available for sale is a laboratory-matched pair of Brimar CV4068 / 13D3 dual triodes, Made in England. These are high-reliability “Special Quality” versions of the 12AU7 family, featuring the desirable Long Black Plate structure and a Big Ring Getter. These New Old Stock (NOS) units have been precision tested on the Amplitrex AT1000 for balanced performance.
- Type: CV4068 / 13D3
- Brand: Brimar
- Condition: New in Original Box
- Construction: Long Black Plate / Big Ring
- Origin: England
- Testing: Amplitrex AT1000
Audiophile Note: The CV4068 is prized for its low microphonics and exceptional detail, making it a favorite upgrade for high-end preamplifiers.
Matching Grade: These tubes are matched across all four triode sections to ensure perfect stereo symmetry.
Performance: Strong emission and transconductance levels, testing well within NOS range.
⚠️ Custom duties & taxes are the buyer’s responsibility.
| Serial No. | Section | Parameter Ip (mA) | Result Ia (mA) | % Ip | Parameter Gm (uMhos) | Result Gm (uMhos) | % Gm |
|---|---|---|---|---|---|---|---|
| 1225001 | Triode 1 | 5.5 | 6.3 | 114% | 2100 | 2400 | 114% |
| Triode 2 | 5.5 | 6.1 | 110% | 2100 | 2400 | 114% | |
| 1225004 | Triode 1 | 5.5 | 5.9 | 107% | 2100 | 2400 | 114% |
| Triode 2 | 5.5 | 5.9 | 107% | 2100 | 2400 | 114% |
✉️ For bulk or quantity requirements, feel free to Email us at
[email protected]
Up for Sale: Matched Pair (2 Pcs) — Brimar CV4068 / 13D3
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