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Ray Tubes - SELECT 12AT7 Dual Triode Vacuum Tubes
SKU
RT-SL-12AT7
Ray Tubes - SELECT 12AT7 Dual Triode Vacuum Tubes is available to buy in increments of 1
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Ray Tubes - SELECT 12AT7 Dual Triode Vacuum Tubes
The Ray Tubes SELECT is a dual triode vacuum tube for equipment that calls for a 12AT7 or compatible equivalent. In a push-pull amplifier, it can serve as a driver or phase inverter, depending on the circuit. Its nine-pin base and amplification factor of 60 make it a practical replacement for listeners who want to keep their equipment’s intended tube type while trying a different voicing.
Ray Tubes hand-selects and tests each SELECT 12AT7. Gold-plated pins help resist corrosion at the socket contacts. Ray Tubes describes its presentation as balanced, with controlled bass, a natural midrange, and smooth treble. Listeners who pay close attention to vocal phrasing or the decay of acoustic instruments may find that presentation appealing.
Ray Tubes offers the SELECT 12AT7 in sets of two or four, so you can choose the quantity your equipment calls for. The manufacturer lists ECC81, 6201, and CV4024 as compatible designations. Each package includes a handbook with burn-in guidance and a certificate of authenticity and warranty.
Features:
- Dual triode for compatible driver and phase inverter stages
- Hand selected and tested to Ray Tubes’ SELECT standards
- Gold-plated pins help resist corrosion at socket contacts
- 9-pin base for compatible 12AT7, ECC81, 6201, and CV4024 applications
- Available individually or in sets of two or four
- Includes a handbook with burn-in guidance
Specifications:
| Model | SELECT 12AT7 |
| Tube Type | Dual triode vacuum tube |
| Compatible Designations | 12AT7 / ECC81 / 6201 / CV4024 |
| Tube Socket | 9-pin |
| Pin Finish | Gold-plated |
| Heater Voltage and Current | 6.3 V at 0.30 A (parallel) or 12.6 V at 0.15 A (series) |
| Class A Maximum Ratings (Per Section) | Anode voltage: 300 V Grid voltage: −50 V Anode dissipation: 2.5 W Heater-to-cathode voltage: ±90 V |
| Grid Circuit Resistance | 1 megohm (self bias) or 0.25 megohm (fixed bias) |
| Interelectrode Capacitance | Grid-to-grid: 0.005 pF Plate-to-plate: 0.4 pF |
| Interelectrode Capacitance (Per Section) | Grid-to-plate: 1.5 pF Grid-to-cathode/heater: 2.2 pF Plate-to-cathode/heater: 0.5 pF Heater-to-cathode: 2.4 pF Plate-to-cathode: 0.2 pF Cathode-to-heater/grid: 4.6 pF Plate-to-heater/grid: 1.8 pF |
| Static Characteristics at 100 V Anode Voltage | Anode current: 3.7 mA Transconductance: 4 mA/V Cathode resistor: 270 Ohms Amplification factor: 60 Approximate internal plate resistance: 15 kOhms Approximate grid voltage: −5 V |
| Static Characteristics at 250 V Anode Voltage | Anode current: 10 mA Transconductance: 5.5 mA/V Cathode resistor: 200 Ohms Amplification factor: 60 Approximate internal plate resistance: 10.9 kOhms Approximate grid voltage: −12 V |
| Included Documentation | User handbook with burn-in guidance and certificate of authenticity and warranty |
| Warranty | 1-year manufacturer warranty |
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