Welcome to our shop! Features: 1. Commonly used in SSB, AM linear power amplifier, CW, FM, power amplifier, and the most basic signal amplification. 2. Easy to install and operate. 3. Low noise, high cost performance, very suitable for DIY enthusiasts. 4. The overall gain exceeds 40db, which is 10,000 times. Input 10W will output 1mW, and input 45W will output 5mW. 5. Our products are shipped as parts, not including radiators, please assemble them yourself. Specification: - Input power: 1-5mW - Output power: 45W (maximum) - Input voltage: DC 13.8V 10A or higher - Maximum output power: 57W (without heat sink) - Output impedance: 50 ohms, adjustable between 10-200 ohms as needed - Input frequency range: 3M-30MHz (HF channel) - Input/output interface: standard SMA interface, external threaded hole - Frequency input range output power: - 3.500MHz----54W - 7.050MHz----56W - 10.000MHz----57W - 14.270MHz----55W - 21.400MHz----41W - 24.000MHz----37W - 28.100MHz----25W - 29.600MHz----20W - Weight: approx. 62g Package list: 1 * Power Amplifier DIY Kit 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.