SELECT 12AT7

Unlock New Layers of Sound

The SELECT 12AT7 is the best 12AT7 vacuum tube you’ll ever need. It goes above and beyond the baseline with more involved production and stricter selection, all in pursuit of superior sound. The SELECT Collection brings out the best in all your favorites.

Hand selected and tested, the Ray Tubes SELECT 12AT7 features gold pins for corrosion resistance and improved conduction. The SELECT Collection is a substantial upgrade from both New Old Stock and other new production tubes. Fewer than 5% of production meets our standards.

The 12AT7 vacuum tube is part of a family of dual triodes that also includes the 12AX7 and 12AU7. Its higher gain and transconductance made it suitable for high frequency applications in devices like TVs and FM radios. In the world of audio, it’s commonly used as a driver or phase inverter in push-pull audio circuits.

Sound Characteristics

The SELECT 12AT7 offers a balanced and natural sound, perfect for users seeking fine detail and mid-to-high frequency performance, especially suited for complex compositions and systems that require high resolution.

1. Bass Performance
   Tight with moderate quantity and good control. Provides clarity and definition without emphasizing deep bass, making it suitable for detailed music genres like jazz and light classical.
2. Midrange Performance
   Well-balanced and natural, offering both warmth and clarity. It excels in vocal and acoustic instrument reproduction, delivering a rich and realistic sound with precise detail in note articulation.
3. Treble Performance
   Clear and transparent with moderate extension, providing rich detail in the high frequencies.The high end is smooth, offering a gentle brightness without harshness. Well-balanced overall.
4. Dynamics and Soundstage
   The dynamics are rich and nuanced, accurately presenting subtle changes in volume. The soundstage is wide, with precise imaging, making it ideal for large-scale music and complex audio arrangements, delivering a strong sense of space and depth.

Technical Specifications

• Tube Type: 12AT7 / ECC81 / 6201 / CV4024
• Tube Socket: 9-pin

Heater

• Heater Voltage: 6.3 V (parallel) / 12.6 V (series)
• Heater Current: 0.30 A / 0.15 A

Maximum Ratings in Class A Amplification (Per Section)

• Anode Voltage: 300 V
• Grid Voltage: –50 V
• Anode Dissipation Power: 2.5 W
• Heater-to-Cathode Voltage: ±90 V
  

Grid Circuit Resistance

• Self Bias: 1 MΩ
• Fixed Bias: 0.25 MΩ
  

Interelectrode Capacitance

• Grid-to-Grid: 0.005 pF
• Plate-to-Plate: 0.4 pF
• Grid-to-Plate (per section): 1.5 pF
• Grid-to-Cathode/Heater (per section): 2.2 pF
• Plate-to-Cathode/Heater (per section): 0.5 pF
• Heater-to-Cathode (per section): 2.4 pF
• Plate-to-Cathode (per section): 0.2 pF
• Cathode-to-Heater/Grid (per section): 4.6 pF
• Plate-to-Heater/Grid (per section): 1.8 pF
  

Static Parameters

• Anode Voltage: 100 V / 250 V
• Anode Current: 3.7 mA / 10 mA
• Transconductance: 4 mA/V / 5.5 mA/V
• Cathode Resistor: 270 Ω / 200 Ω
• Amplification Factor: 60 / 60
• Approx. Internal Resistance: 15 kΩ / 10.9 kΩ
• Approx. Grid Voltage: –5 V / –12 V

Package Contents

• Set of four, two, or single vacuum tube
• User handbook featuring burn-in guidelines
• Certificate of authenticity and warranty

The Ray Tubes One Year Warranty

Most vacuum tubes are notoriously fickle. That’s why warranties are rare. But we trust our products and we’re proud to offer our One Year Warranty against manufacturing defects. For more details, check out our warranty page.