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: 1-5mWOutput power: 45W (maximum)Input voltage: DC 13.8V 10A or higherMaximum output power: 57W (without heat sink)Output impedance: 50 ohms, adjustable between 10-200 ohms as neededInput frequency range: 3M-30MHz (HF channel)Input / output interface: standard SMA interface, external threaded holeFrequency input range output power:3.500MHz----54W7.050MHz----56W10.000MHz----57W14.270MHz----55W21.400MHz----41W24.000MHz----37W28.100MHz----25W29.600MHz----20WWeight: approx. 62gPackage list:1 * Power Amplifier DIY Kit