LOW LEVEL TRANSMIT AMPLIFIER
LOW LEVEL AMPLIFIER
The low level amplifier is very similar
to the one used in the 80M Transceiver. 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.
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