There's no doubt you can get parasitics. In my experience, they don't just
'appear' in an equipment that's operating satisfactorily, unless the resistors
burn up - and if the parasitic is suppressed, then the only thing to heats the
resistors is the signal current. Of course, the harmonic currents will provide
heating, too - don't forget that in Class B stage, the second harmonic plate
current is only 6dB down on the fundamental.
But a lot of the suggestions we've seen here over the years strike me as being
similar to the beliefs held in Salem some 300 years ago! I go along with Tom
and John in this.
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