Thedesignofpoweramplifiersexertsadeepfascinationallofitsowninbothamateurandprofessionalcircles.Thejobtheydoisessentiallysimple,butmakingareliablehigh-performancecircuittodoitwellissurprisinglydifficult,andinvolvesdelvingintoallkindsofbywaysofelectronics.Perhapsthisparadoxisatthe