TELEFUNKEN EF86 / 6267 – MATCHED PENTODE PAIR (2 PCS)
Authentic Diamond Logo Bottom
Made in Germany
Silver Cage Internal Shielding
Top Ring Getter
Low-Noise Audio Pentode EF86 / 6267
New in White Box
Amplitrex AT1000 Tested
Up for sale is a matched pair (2 pcs) of premier authentic vintage NOS Telefunken EF86 / 6267 low-noise audio pentode vacuum tubes, supplied in individual white boxes. Made in Germany, these iconic German audio valves feature the legendary molded diamond logo in the glass base, precision silver cage internal shielding construction, and top ring getters. Universally acclaimed by audiophiles, recording engineers, and tone purists for ultra-quiet background operation, supreme clarity, linear response, and non-microphonic performance. An elite-tier matched pair upgrade for Vox AC15/AC30 V1 channels, high-end tube preamplifiers, and vintage condenser studio microphone circuits.
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: 3.0 mA / 1,800 uMhos) are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO.101001 | Single Pentode | 3.0 mA | 2.1 mA | 70% | 1800 | 1600 | 89% |
| SR.NO.101037 | Single Pentode | 3.0 mA | 2.2 mA | 73% | 1800 | 1700 | 94% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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