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IRF530 RF amp tests

This video shows the adjustment of the bias voltage on an EBay MINIPA70 RF power amplifier. This is an RF broadband amplifier using a pair IRF530 MOSFETS as advertised on EBay. The video illustrates the effect of the bias voltage on 2 tone distortion products. The test was conducted on 7.098MHz at a power level of 50 watt.