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Ray Tubes - SELECT 2A3 Direct Heated Triode Power Tube
SKU
RT-SL-2A3
Ray Tubes - SELECT 2A3 Direct Heated Triode Power Tube is available to buy in increments of 1
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Ray Tubes - SELECT 2A3 Direct Heated Triode Power Tube
The Ray Tubes SELECT 2A3 is a directly heated power triode for the output stage of compatible 2A3 amplifiers. It uses a four-pin base and a 2.5 V filament. Ray Tubes lists 3.5 W of output under its published typical operating conditions.
Ray Tubes selects and tests each tube by hand. Gold-plated pins help resist corrosion at the socket contacts. The manufacturer describes the sound as having articulate bass, a gently warm midrange, and open treble. That balance may appeal to listeners who pay close attention to vocal phrasing and the texture of acoustic instruments.
The SELECT 2A3 comes as a matched pair, or matched quad, so you can choose the set that fits your amplifier. Each package includes a handbook with burn-in guidance and a certificate of authenticity.
Features:
- Directly heated power triode for compatible 2A3 amplifiers
- Hand selected and tested to Ray Tubes’ SELECT standards
- Gold-plated pins help resist corrosion at socket contacts
- Four-pin base with a 2.5 V filament
- Available as a single tube, matched pair, or matched quad
- Includes a handbook with burn-in guidance
Specifications:
| Tube Type | 2A3 |
| Tube Socket | 4-pin |
| Filament Voltage | 2.5 V |
| Filament Current | 2.5 A |
| Maximum Plate Voltage | 300 V |
| Maximum Plate Dissipation | 25 W |
| Input Capacitance (Zero Bias) | 7.5 pF |
| Output Capacitance (Zero Bias) | 5.5 pF |
| Grid-to-Plate Capacitance (Zero Bias) | 16.5 pF |
| Typical Plate Voltage | 250 V |
| Typical Grid Voltage | −45 V |
| Typical Plate Current | 60 mA |
| Typical Transconductance | 5.25 mA/V |
| Typical Plate Resistance | 800 Ohms |
| Typical Amplification Factor | 4.2 |
| Typical Output Power | 3.5 W |
| Warranty | 1-year manufacturer warranty |
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