1250W FM Pallet Amplifier – High Power & Efficiency

This 1250W FM Pallet Amplifier delivers reliable performance for high-power RF applications using a single rugged LDMOS push-pull transistor. Optimized for the 87.5–108 MHz FM broadcast band, it provides up to 1250W peak output power with excellent efficiency. Designed for long-term stability, it integrates seamlessly with proper heatsink and fan cooling solutions.

Technical Specifications:

• Frequency Range: 87.5 – 108.0 MHz
• Supply Voltage / Current: 50 V @ 31.5 A
• Efficiency: Up to 80%
• Impedance: Input/Output 50 Ω
• Output Power: ~1250 W with ~4-6 W drive
• Power Gain: ~22.5 dB
• Amplifier Class: B push-pull
• Operating Modes: CW and FM default; adjustable bias for SSB and linear modes
• Dimensions (L × W × H): 101 × 57 × 38 mm
• Baseplate: Standard 6 mm copper
• Weight: 0.9 kg
• Transistor: MRFE6VP61K25H

Key Advantages:

• High Power: 1250W output with a single transistor
• Energy Efficiency: Up to 80% efficiency for reduced heat and power consumption
• Compact Design: Small footprint with high performance
• Easy Integration: Ready solution for FM transmitter modernization
• Durability: Rugged LDMOS technology ensures long service life

Applications:

• FM Broadcast Transmitters
• High-Power RF Amplification Systems (particle accelerators, plasma generators, cyclotrons)
• Modernization of legacy FM transmitters

Important Notes & Warnings:

• Ensure proper RF protection between exciter and final stage.
• Use feed-through capacitors on +50 V supply to prevent RF interference.
• Adjust supply voltage according to output power for maximum efficiency (typical 1–3 dB gain compression).
• Cooling is mandatory: adequate heatsink and fan airflow are required to prevent overheating.
• Use PTFE coaxial cable (RG178) for RF input and RG142 for output; keep cables short.

Caution: Pallet amplifiers are precision devices. If you lack sufficient experience, consider a finished product instead. The amplifier may fail under the following conditions:

• Excessive drive power
• Over-voltage supply
• Insufficient cooling or airflow
• Operation without proper load

No warranty is provided for pallets. However, each unit is fully tested and delivered 100% operational.