Rlacement of MOSfets alone can't not solve the case.
?However there is reasonable improvement,. Interestingly, there is a dip in gain at 21.2MHz and recovered at 28 MHz. Twe need to analyse this behaviour. I wonder what would happen if we can tweak C261 and C262? by lowering their values , say 68nF instead of 100nF !!? ??
If R97 and R98 could be increased to say 100 ohms, the gate loading would reduce, I agree that, we? need to ensure thast amplifier would not become unstable.
regards
?sarma
?vu3zmv
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