410-470MHz RF Power Amplifiers Board For Small Relay 450C 433MHz Range Extension

Features: 20W Small Power Amplifiers for 450C and DIY Small Manual Relay 433 Radio and 433 Model Range The potentiometer on the board can adjust the output power of the amplifiers and the smaller the smaller the clockwise direction the larger (multi-turn potentiometer) Installation method: The relay transmitter is connected to the power amplifiers input. The output of the power amplifiers is connected to a duplexer and a dual power device and the duplexer is connected to the antenna Specification: Input power: 0.5-5W transmit Frequency: 410-470MHZ Output power: 18-22W Power supply voltage: 10-13.8V Standby current: 0A Minimum size: 68*43mm Package Contents 1 x 4 amplifiers