The Siemens EF86 / 6267 is a German-made vacuum tube commonly used in vintage audio equipment, guitar amplifiers, microphone preamps, and other hi-fi applications. It is well known among audio enthusiasts for its low-noise design and compatibility with a variety of classic audio equipment. This listing includes a pair of Siemens EF86 / 6267 tubes with their original boxes.
Both vacuum tubes have been inspected and tested for basic functionality, including filament illumination and electrical continuity. The glass bodies and pins are in good physical condition with no major visible damage. The original Siemens boxes are included and show signs of age, such as light wear, creases, and small tears from long-term storage, as shown in the photos. Please refer to the photos for the cosmetic condition and included items.
| Manufacturer | Siemens (Siemens-Röhre) |
| Tube Type | EF86 / 6267 (Low-Noise Pentode) |
| Quantity Included | 2 Tubes (Pair Setup) |
| Packaging | 2x Original Siemens Factory Boxes |
| Country of Manufacture | Germany (West Germany Era) |
| Base Type | Noval B9A (9-Pin) |
| Dimensions (Per Tube) | Approx. 0.87 inch diameter x 2.13 inches height (22 mm x 54 mm) |
| Weight (Per Tube) | Approx. 0.53 oz (15 g) |
| Archive Location | Tokyo, Japan |