• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Usefullness of tubes

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OPTs are going to play a part in the "look" of clipping behavior as well, but that is beyond the subject of this thread. Rather than trying to measure the sharpness of clipped wave forms with a carpenter's square in the time domain, would it be more telling to compare behaviors in the frequency domain?

Probably so. I find it useful to view both. BTW the OTL circuit we have been discussing has a soft clipping quality- despite being push pull (BTW I've not seen a P-P amp that has hard clipping either).
 
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