Features: INCLUDES at no extra charge a brand new aluminium Heatsink
Includes RF Transistor MRF186 on a seperate PC board.
All parts are included in this DIY Kit including a free heat sink and a free cooling fan at no extra charge with your kit.
Amplifier output: 80--100 Watts
Frequency range 80--120Mhz ( input 1--1.5W) 140--170Mhz (3--4W) ( Can used FM Radio Band ( 88-108Mhz) Broadcasting Also!!!) Add an extra $20 for spare parts and mod schematic.
Power : DC 24--26v current: 5-7Amps
1: Installation steps
According to the picture data according to welding, installation drawings.
2: Tuning steps: Welding completed with installed Heat Sink!
First, do not install MRF186 (XRF186) RF Transistor yet!
Connect the power supply 24V adjust the bias voltage of 3.5V and then disconnect the power supply
Install the transistor MRF186 (XRF186), pay attention to unplug the electric soldering iron, soldering iron welding using waste heat, preventing electrostatic breakdown of MOS power transistor
3: connect the power meter, dummy load, first turn on the power, adjust the quiescent current, 200--800MA, 400MA is the best
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
Warning: input maximum FM VHF 1.5W, maximum 4W, maximum 7W-8W output UHF, maximum 100W, Output Disable open circuit, short circuit
100% Brand New
1 x 100W FM VHF 80Mhz-170Mhz RF Power Amplifier Board For Ham Radio DIY kits DC 24v
We also carry an excellent high current 24 Volts DC power supply in stock to drive this linear amplifier to it's full potential output for sale..