irf 840 no good irf p460 best ,Instead of 1m, put 520k ohm, 100mf electrolytes replace 100mf tanatal, instead of 2.2mf put 6,8nf / 50v excellent stability, it can be put instead of lf357n .... lm709metal, lf351n, tl072cp, instead of bs170 put 2n7000,