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<p>[QUOTE=&quot;WA4GCH, post: 1859691, member: 32196&quot;]IN SHORT ....</p><p>&nbsp;</p><p>Class &quot;A&quot; lowest distorion only about 30% efficent GREAT if you don&#039;t mind </p><p>a lot of heat since 70% of the power is lost .... The final is ON 100% of the time</p><p>&nbsp;</p><p>Class &quot;B&quot; more efficent about 50% higher distortion but good enough for any mode AM/FM/SSB/CW . The final os ON 50% of the time</p><p>&nbsp;</p><p>AB is in between them .....</p><p>&nbsp;</p><p>Class &quot;C&quot; high distortion up to 70% efficent Good for FM/CW NOT good for AM. The final is ON LESS than 50% of the time.</p><p>&nbsp;</p><p>When the final is ON it is burning up power ....[/QUOTE]</p><p><br /></p>

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