Simply replacing the stock final and repeaking the output coil is all there is to it. You won't see anywhere near double the power. More like one-third to one-half again higher reading. but folks who worship small boosts in the wattmeter reading will love it. Just be sure to apply fresh heat-sink compound. Consider also that the audio-power amp chip is supplying some of that new, additional power. Make sure that it's bolted to the heat sink securely and also has that all-important thin, thin flm of compound on both faces of the mica insulating washer.
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