LOW LEVEL TRANSMIT AMPLIFIER



TX Amp
LOW LEVEL AMPLIFIER


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.

Amp top view
TOP VIEW


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