RCA 7587 Nuvistor Vacuum Tube: Sharp-Cutoff Tetrode The RCA 7587 Nuvistor is a compact, sharp-cutoff tetrode vacuum tube engineered for high-frequency applications. Its design emphasizes durability, efficiency, and consistent performance across various operating conditions. Key Features Compact Design: Measuring approximately 1 inch in length and less than 0.5 inches in diameter, the 7587 is ideal for space-constrained applications. High Transconductance: Offers a transconductance of 10,600 micromhos at a plate current of 10 milliamperes, ensuring efficient signal amplification. Low Heater Current: Operates with a heater current of 150 milliamperes, contributing to energy efficiency. Rugged Construction: Features an all-metal-and-ceramic build, providing high resistance to shock and vibration, suitable for demanding environments. Temperature Resilience: Capable of operating at metal shell temperatures up to 150°C, ensuring reliability under high-temperature conditions. Sharp-Cutoff Characteristics: Designed for precise signal control, making it suitable for applications requiring sharp cutoff behavior. Applications The RCA 7587 is versatile and can be utilized in various applications, including: Radio frequency (RF) amplifiers Intermediate frequency (IF) amplifiers Video amplifiers Signal mixers On-off control circuits Technical Specifications Filament Voltage: 6.3 volts Filament Current: 150 milliamperes Plate Dissipation: 2.2 watts Input Capacitance (Cold): 6.5 pF Output Capacitance (Cold): 1.4 pF Grid No. 1 to Plate Capacitance: 0.015 pF (maximum) The RCA 7587 Nuvistor stands out for its compact size, high performance, and robust construction, making it a reliable choice for various industrial and military applications requiring sharp-cutoff tetrode characteristics.