811A HI MU POWER TRIODE Matched Pair

The Penta Laboratories 811A Matched Pair

is a versatile high mu power triode, engineered for demanding applications in audio and RF amplification, as well as modulation and oscillation. This robust tube delivers up to 160 watts of output power, with a frequency response extending up to 30 MHz, making it ideal for a wide range of communication and audio systems.

Proven Performance: Extensive testing validates its equivalence to the legendary RCA and Svetlana 811As.

Compatible with a Variety of Ham Radio Equipment: Including but not limited to:

• Collins 30L-1 Linear Amplifier
• Hy-Gain DB-101 Linear Amplifier
• Linear Systems LK-800 Linear Amplifier
• Ameritron AL-811 Amplifier
• Kenwood TL-922 Amplifier

Product Highlights:

• High Mu Power Triode: Designed for superior performance in audio and RF amplification, modulation, and oscillation.
• High Power Output: Capable of outputting up to 160 watts, ensuring ample power for your applications.
• Wide Frequency Response: Operates effectively up to 30 MHz, suitable for various communication and audio frequency needs.
• Thoriated Tungsten Filament: Provides reliable and efficient electron emission for optimal performance.
• Vertical or Horizontal Mounting: Offers flexibility in installation to accommodate your system design.

Product Specifications:

• Electrical Characteristics
• Filament Type: Thoriated Tungsten
• Filament Voltage: 6.3 Volts
• Filament Current: 4 Amperes
• Amplification Factor (Ib = 20mA): 160
• Direct Interelectrode Capacitances
• Grid to Plate: 5.5 pf
• Grid to Filament: 5.9 pf
• Plate to Filament: 0.7 pf
• Mechanical Characteristics
• Mounting Position: Vertical (Base Down) or Horizontal (Pins 1 and 4 in Vertical Plane)
• Overall Length: 167 mm
• Overall Diameter: 62 mm
• Maximum Ratings (AF Power Amplifier and Modulator)
• DC Plate Voltage: 1250 Volts
• Maximum Signal DC Plate Current: 175 mA
• Maximum Signal Plate Input: 165 Watts
• Plate Dissipation: 45 Watts