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RE: Initial A/B test between PP and SE 6bq5 amps

Posted by Tre' on June 23, 2017 at 19:42:27:
"Intellectually it has always bothered me that single ended amps are asymmetrical, that is they crop the negative half of the wave form, compress it relative to the positive half. "

Tubes want to turn on more than they like to turn off.

DHTs less so.

What you describe is the behavior of a tube with plate curves that have narrow spacing of the grid lines to the right and wide spacing of the grid lines to the left of the idle point.

Take a look at the plate curves of a 300b above (or 2a3 or 45 or 845 or 211). You don't see this un-even spacing between the grid lines.

The plate curves in the post below are that of a triode wired KT88 where you will get the affect you describe.

Tre'