7T85RB / AX7T85RB Triode Tube

The 7T85RB / AX7T85RB Triode Tube, also known under the Amperex designation AX7T85RB, is a high-quality, forced-air cooled ceramic-metal triode specifically designed as an OEM replacement for a wide range of Radio Frequency (RF) welding systems.

Engineered for robust and reliable performance in demanding industrial environments, this triode ensures consistent power output for efficient and precise welding of various thermoplastic materials.

Key Performance Specifications:

• Filament Voltage: 6.3V
• Filament Current: 35A
• Brand: Amperex for Penta Labs 
  
• Maximum Plate Dissipation: 2.5 kW (conservatively rated for compatibility with 7T85RB, can dissipate up to 3.5kW as AX7T85RB)
• Maximum Frequency: 110 MHz
• Amplification Factor (μ): 21
• Transconductance: ≥ 5 mA/V
• Interelectrode Capacitances (Grounded Cathode):
• Grid-Filament: 15 pF
• Plate-Grid: 13 pF
• Plate-Filament: 0.5 pF
• Cooling: Forced Air (Minimum Air Flow Rate: 3.3 m³/min, Minimum Static Pressure: 17 mm of water)
• Operating Position: Vertical, Anode down or up
• Maximum Inlet Air Temperature: 45°C
• Maximum Radiator Temperature (on anode core): 250°C
• Weight: Approximately 1.5 kg (7T85RB) / 2.8 kg (AX7T85RB)

Features and Benefits:

• Direct OEM Replacement: Designed to seamlessly replace 7T85RB, TT85RB, and 7T85RA tubes in existing RF welding equipment.
• Enhanced Durability: Robust ceramic-to-metal construction ensures long-lasting performance in industrial settings.
• Improved Thermal Characteristics (AX7T85RB): The AX7T85RB variant features a copper radiator for superior cooling, allowing for cooler operation under high load conditions and potentially higher power dissipation.
• Consistent RF Power Output: Provides the stable and reliable power necessary for high-quality RF welding of materials like PVC, EVA, TPU, and various other thermoplastics used in industries such as:
• Automotive (e.g., car seat covers)
• Medical (e.g., IV bags, drainage bags)
• Packaging (e.g., PVC packing bags, blister packs)
• Textiles and Apparel (e.g., waterproof clothing, emblems)
• Inflatable Products (e.g., airbeds, rafts)
• Stationery (e.g., PVC book covers, file folders)
• Advertising and Signage (e.g., vinyl banners)
• High Frequency Performance: Optimized for efficient operation at frequencies up to 110 MHz, ideal for a wide range of RF welding applications.

Note: Always refer to your equipment's manual for specific tube requirements and installation procedures.

Upgrade or Maintain Your RF Welding System with Confidence. Order your 7T85RB / AX7T85RB Triode today!