Power Amplifier

This Design Idea presents a simplified ac high-voltage amplifier that uses complementary, cascaded NMOS and PMOS transistors (Figure 1). The OP07 op amp has low input-offset voltage, low input-bias current, and high open-loop gain.
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This is the ticket for boosting power up to a 1/2 watt over a frequency range of 100 KHz to over 1000 MHz! Although intended for use as a lab amplifier, many users in foreign countries use the LPA1C to boost their Ramsey FM stereo transmitters to a watt of power, capable of providing radio [...]

The amplifier can be assembled by a reasonably experienced hobbyist in about three hours. The metalwork will take somewhat longer, and this is especially true for the high continuous power variant. Even so, it is simple to build, compact, relatively inexpensive, and provides a level of performance that will satisfy most requirements.
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http://www.sound.westhost.com/project68.htm