RWN NEUHAUS EF86 / 6267 – SINGLE PENTODE TUBE (1 PC)
Clear Glass Envelope
Top Ring Getter
Grey Plate Construction
Low-Noise Audio Pentode EF86 / 6267
New in White Box
Amplitrex AT1000 Tested
Up for sale is a single (1 pc) vintage NOS RWN Neuhaus EF86 / 6267 low-noise audio pentode vacuum tube, supplied in an individual white box[cite: 17]. Featuring a clear glass envelope, top ring getter, and robust grey internal plate construction[cite: 17], this German-made RWN Neuhaus valve is prized for its silent noise floor, detailed frequency extension, and excellent resistance to microphonics. An ideal upgrade or replacement tube for Vox AC15/AC30 V1 channels, high-end audio preamplifiers, and vintage condenser studio microphone preamps.
This tube has been fully tested on a precision Amplitrex AT1000 tube tester[cite: 17]. 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[cite: 17].
| Serial No. | Tube Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | ||
| SR.NO. 932001 | Single Pentode | 3.0 mA | 3.2 mA | 107% | 1800 | 2200 | 122% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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