PA300W amplifier PCB 10-300W with LPF (печатная плата с ФНЧ)
300W HF / 50 MHz VRF2933 / SD2933 power amplifier board with LPF and high speed protection triggers.
This single board HF/50MHz power amplifier contains all necessary modules for safe operation:
300W output power amplifier on 2 x MOSFET transistors, SD2933 or VRF2933;
7-band low pass filter to cover all HF amateur radio bands as well as 50MHs;
three level high speed protection : high SWR in antenna feeder, wrong or no LPF selected, output power overshoot and drain current excess.
The power amplifier has ATT on input, so different drive levels can be accepted, starting from about 3W (without ATT).