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When adjusting the power stage after replacing the FETs, it is important that your power supply has a current limit.

Otherwise, you can replace the FETs again after the replacement.

So set the power supply to 12V and the current limit to a maximum of 2.00A.

In this case, you do not have to replace the previously failed parts again, even if the setting is incorrect.

Oh, and the antenna connector should have a dummy load, because the radio frequency is displayed there.