FM Amplifier KFG Series Overview

FM amplifiers KFG series are designed to operate across the full 87.5 – 108 MHz frequency range for FM radio broadcasting, with power ranging from 100W to 40kW.

Main Characteristics

• GREEN RF™ technology: High RF efficiency (>70%), higher safety and reliability, lower heating, and lower AC power consumption.
• Hot-Plug Solution (optional): Available for amplifiers over 5kW, allowing full-power on-air maintenance without interruption.
• Uninterrupted service: Intelligent protection system reduces power without interrupting transmission in case of load mismatching, over-temperature, or module failure.

High Efficiency Cooling System

The air-cooling system limits the heat-sink temperature rise to only about 10°C above ambient, ensuring reliable performance even in extreme climates.

Liquid Cooling

Our oversized liquid cooling system provides efficient temperature management, reducing the need for air conditioning and ensuring quiet, low-heat operation.

Advantages of Liquid Cooling

• Efficient in hard climate conditions
• Reduced air conditioning needs
• Longer lifespan for transistors and active elements
• Low acoustic noise

AAD Technology

Prevents corrosion from moisture and increases reliability by using anticorodal aluminum components and tropicalized circuit boards.

Model Specifications

General Information

• Frequency range: 87.5 to 108 MHz adjustable with 10kHz step
• Output impedance: 50 Ω
• Spurious and harmonic suppression: Exceeds CCIR/FCC requirements
• Power stability: < 2% (ALC)
• DC to RF efficiency: 83% typ.

AC Power Requirements

• AC supply voltage: 115 / 230 VAC ± 15%, single-phase or 230/380 VAC ± 15%, three-phase
• AC supply frequency: 50 Hz or 60 Hz, ±5%
• Power factor: > 0.9

Environment

• Cooling: Forced air with built-in axial fans / Liquid cooling (optional)
• Service: Continuous 24/24h
• Operating temperature: -5°C to +45°C
• Relative humidity: Up to 95%