Ray Tubes Vacuum Tube - 300B RESERVE

Ray Tubes Vacuum Tube - 300B RESERVE

Product Highlights * Hand-selected and tested * Gold pins for corrosion resistance and excellent conduction * A substantial upgrade from standard NOS tubes * Magic Coating: Monocrystalline carbon coating enhances sound by cooling, blocking noise, and allowing for quicker electron transmission * Low noise and microphonics * Matched quad (4 tubes) or pair (2 tubes) or single tube (1 tube) * Only 5% of the tubes commissioned for production meet our standards for gain and conductance matching * 12-month warranty against manufacturing defects Magic Coating Some things are better left unseen. You canʼt see inside the RESERVE tube because itʼs coated with something called monocrystalline carbon. This layer keeps the electrons on their toes, cools things down, and blocks out noise. If youʼre into engineering, you might find the science fascinating. For the rest of us, itʼs basically magic. The coating is delicate and tough to apply, which complicates production. Thatʼs why we only use it for our RESERVE tubes. Ray Tubes Quality Control Step 1 - Microscopic Soldering Inspection To ensure a perfect vacuum seal, we solder the tip of each pin in the final assembly step. Using microscopes, we analyze the integrity of the soldering, as any compromise can affect the tube's performance Step 2 - Extensive Burn-In Each tube undergoes a 24 hours burn-in period to stabilize components and identify early signs that might lead to premature failures later on. Step 3 - Comprehensive Parameter Testing Tubes are tested against more than a dozen critical parameters like amplification factor and internal resistance. Step 4 - Individual Measurement Recording Measurements are logged under each setʼs unique serial number for traceability. Step 5 - Current Draw Analysis Industrial-grade instruments measures current draw to ensure fully-accurate matching. Step 6 - Functional Testing Tubes are installed in amplifiers to assess real-world performance. Step 7 - Microphonics Testing Tubes are subjected to physical stressors to reveal any buzzing or defects. Step 8 - Expert Listening Sessions Audio specialists randomly select certain tubes that have passed all previous tests and evaluate the sound quality of tubes. 300B RESERVE - Pinout and Dimensions

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Technical Specifications Tube Type: 300B * Tube Socket: 4-pin * Output Power - Power Output (Pout): 6.6 W * Filament Specification - Filament Voltage (Uf): 5 V - Filament Current (If): 1.2 A Maximum Rating * Anode Voltage (Ua): 480 V * Anode Dissipation Power (Pa): 40 W * Cathode Current (Ik): - Self Bias: 100 mA | Fixed Bias: 70 mA * Interelectrode Capacitance - Input Capacitance (Cin): 9 pF - Output Capacitance: 4.3 pF - Transfer Capacitance: 15 pF Static Parameters * Anode Voltage (Ua): 300 V * Grid Voltage (Ug): -60 V * Anode Current (Ia): 60 mA * Transconductance (Gm): 5.5 mA/V * Internal Resistance (Ri): 0.7 kΩ * Amplification Factor (