100W FM VHF 80Mhz-170Mhz RF Power Amplifier Board AMP DIY KITS For Ham Radio

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NOTE:<br>MRF186<br>old<br>used<br>These are all the parts, it need you diy welding，Not exactly the same as the picture<br>PCB SIZE :13.5CM x5cm<br>Amplifier output: 80--100W<br>Frequency range 80--120Mhz ( input 1--1.5W) 140--170Mhz (3--4W)<br>Power : DC 24--26v current: 5-7A<br>1: installation steps<br>According to the picture data according to welding, installation drawings.<br>2: debugging steps: Welding completed, installed radiator<br>First, do not install MRF186 (XRF186)<br>Connect the power supply 24V adjust the bias voltage of 3.5V and then disconnect the power supply<br>Install the MOS power tube MRF186 (XRF186), pay attention to unplug the electric soldering iron, soldering iron welding using waste heat, preventing electrostatic breakdown of MOS power transistor<br>3: connect the power meter, dummy load, first turn on the power, adjust the quiescent current, 200--800MA, 400MA is the best<br>4: the test power connected to push, push, push FM maximum 1.5W, maximum VHF 4W FM and VHF, the basic do not adjust, promote the UHF Max 7W-8W, UHF adjusts the variable capacitor to obtain optimum output power<br>Warning: input maximum FM VHF 1.5W, maximum 4W, maximum 7W-8W output UHF, maximum 100W, Output Disable open circuit, short circuit<br>Prohibition of illegal use of power amplifier, illegal use has nothing to do with others<br>Package Contents<br>1 x 100W FM VHF 80Mhz-170Mhz RF Power Amplifier Board For Ham Radio DIY kits DC 24v<br>