When BOTH tubes are conducting then each tube sees a load of Raa/2 but when one tube cuts off the other sees a load of Raa/4
Wow. Thats's news to me. Care to explain why one tube in cutoff halves the load impedance seen by the plates? No sarcasm, this is something I've never heard before and I am an information hound.
One of the benefits of Ultralinear is that it gives a smooth transition from Class A to Class B
Again: news to me. Somehow in all my reading on ultralinear I missed that one too.
Don