150W RF PA 0.4MHz - 3MHz

[spacecase0]

one last thing,
if you have not powered up a new amplifier before,
make sure to set your gate bias to zero volts before powering up the circuit for the first time.
then watch your power supply current as you up the voltage on the gate to the required idle current.
this is because on the max bias setting you potentially damage your amplifier with over current.
A fuse on your power in can also make sure that error does not break things.

[Buddhafollower]

Yes. Thank you for your advice
In the recent past i burned up two IRFP250 because of over current.
The quiescent current was set at about 1,5A which was enough to light up a 60W 24V incandescent light bulb at 1MHz. And the two MOSFETs were destroyed. I remembered to set the q current and then everything was well.