Wednesday, 9 March 2011

N4UY 40M RF Power amplifier



This 40 meter amplifier posted Is handy for boosting the power of rigs running a few hundred milliwatts, and can put out 2 or 3 watts.

The RF enters through a 0.1 uF cap and a small ferrite bead to the PA transistors. A 2 uH inductor provides a DC return for the bases. 12 volt is applied to the collectors through an 8 uH choke. A 47 pF electrolytic cap and 0.1 pF cap bypass unwanted signals from the V+ source to ground.

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