ps.: if you have the opportunity, use the device from a current-limiting power supply so that it has a long life.
I had to replace the D27 and D28, and then managed to destroy the original IRFZ24Ns, because I used them from a battery, without current limitation.
Since I've been using it with current limitation (12.5V 6.00A), I've made more than a thousand ft8 QSOs on 7-14-21 MHz with a vertical Loop antenna.
I've been using it since mid-November.
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Gyula HA3HZ
HA3HZ