On Sun, 14 Mar 2004 09:31:23 -0800, John Larkin
wrote:


A square wave has lots of 5th and - ideally - no 4th or 6th harmonics.
Going through a class-C stage *adds* in the 4-6 guys, and then you
have to work harder to filter them out. Why do that?

For the simple reason that it's dead easy to re-wire the original
board to this new config and see straight away if there's any
indication of 5th. If that should be the case, and having already
built a BPF for the 5th, the problem would be solved for very minimal
effort indeed.
--

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