Asymmetric compression. The same effect as a "cold clipper" - on a smaller scale. Yes, I see that now - I hadn't thought of that effect before! Another reason to finally tackle that EL34 SE project!martin manning wrote: ↑Thu Nov 18, 2021 6:01 pm In Class A the grid curves and therefore the plate current vs. grid voltage expands on the positive swing and compresses on the negative swing...
And the further left to the knee you set your load line - i.e. the flatter the load line becomes, the higher your OT impedance is at the same HT, the more screen current you incur, squashing the grid curves together too. Compression at both ends. Would that have an influence that would suggest different OT loads for P/P vs. single tube SE (apart from the obvious factor 2 for P/P) ? Could that be a reason to favor a flatter load line for SE?