my bad. as guru stated, i modified the circuit using s8050 transistor and got over 2Km of range, but i have to supply 9V for the 2Km goal and that's why i need a boost converter, @guru,
i changed the 2nd transistor with s8050 and removed the final amp transistor, and replaced the v.cap with a fixed "15pf" cap, finally the emitter resistor of 2nd transistor replaced with 100ohm, that is all i modified, @collin, you still didn't mention that the boost conv. Is possible to use with the TX or not.