Ray Tubes - SELECT 12AU7 Dual Triode Vacuum Tubes

Ray Tubes - SELECT 12AU7 Dual Triode Vacuum Tubes
The Ray Tubes SELECT 12AU7 is a current-production vacuum tube for listeners replacing or rolling tubes in a compatible preamplifier or amplifier. Its dual triode design houses two triode sections in a single glass envelope, and its nine-pin base fits equipment specified for the 12AU7 family. Depending on the circuit, the tube can serve in a preamp, driver, or phase inverter stage.
Each SELECT 12AU7 is hand-selected and tested. Gold-plated pins resist corrosion at the socket contacts. Ray Tubes describes the sound as crisp and articulate, with smooth treble and clear separation between layers in a recording.
We offer SELECT 12AU7 in sets of two or four. Ray Tubes lists ECC82, 6189, and CV4003 as compatible designations. Check the tube designation in your equipment manual before ordering, especially if the amplifier uses several similar-looking nine-pin tubes.
Features:
- Current-production 12AU7 dual triode vacuum tube
- Hand selected and tested to Ray Tubes’ SELECT standards
- Gold-plated pins resist corrosion at the socket contacts
- Fits compatible nine-pin 12AU7 sockets
- Supports preamp, driver, or phase inverter use in compatible circuits
- Available individually or in sets of two or four
- Includes a handbook with burn-in guidance
Specifications:
| Tube Type | 12AU7 / ECC82 / 6189 / CV4003 |
| Tube Socket | 9-pin |
| Maximum Anode Dissipation | 2.75 W |
| Maximum Anode Voltage | 300 V |
| Maximum Grid Voltage | Approximately 50 V (as listed) |
| Heater Voltage | 6.3 V |
| Heater Current | 0.3 A |
| Transconductance | 2.2 mA/V |
| Amplification Factor | 17 |
| Internal Resistance | 7.7 kOhms |
| Warranty | 1-year manufacturer warranty against manufacturing defects |


