Many of the components were chosen because of their availability rather than their
suitability. I used a 2SC1166 transistor for the first stage and a 2N4427 for
the second stage. Any VHF/UHF transistor with a maximum power rating of about
one Watt should work work well in this circuit. I can recommend The 2N4427, 2N3866
and 2N5109. Both transistors need a clip on heatsink. The interstage transformer
is 6 turns on a medium to high permeability ferrite toroid. The 470 microHenry
inductor can be replaced with a much smaller one, 22 microHenries should be about
right.
