MULLARD 7308 / CV4108 / E88CC – MATCHED PAIR (2 PCS)
Gold Pins
Top Solid Disc Getter
Grey Plate
Made in UK
Special Quality 7308 / CV4108 / E88CC / 6922
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of ultra-premium vintage NOS Mullard 7308 / CV4108 dual triode vacuum tubes, manufactured in UK and supplied in individual white boxes. Featuring genuine gold pins, sturdy grey plates, and top solid disc getters, the 7308 / CV4108 is the highest military-grade, long-life, low-noise reference standard in the 6922 / E88CC / 6DJ8 tube family. Renowned by world-class audiophiles for its incredible micro-detail retrieval, warm British midrange, extended high end, and whisper-quiet performance. An elite upgrade pair for reference high-end preamplifiers, DAC buffer stages, and headphone amplifiers.
Both tubes have been fully tested on a precision Amplitrex AT1000 tube tester. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs (Reference: 15.0 mA / 12,500 uMhos) are detailed in the table below.
| Serial No. | Triode Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO. 221152 | Triode 1 | 15.0 mA | 12.2 mA | 81% | 12500 | 12330 | 99% |
| Triode 2 | 15.0 mA | 12.4 mA | 83% | 12500 | 12200 | 98% | |
| SR.NO. 221076 | Triode 1 | 15.0 mA | 12.0 mA | 80% | 12500 | 12200 | 98% |
| Triode 2 | 15.0 mA | 12.4 mA | 83% | 12500 | 12530 | 100% | |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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