OK, one another thread I came up with this... to which eblc1388 wrote... I like learning about this kind of stuff. It is said you learn more from failures than successes. So why would this circuit fail to feed 50Ω with unity gain? The transistor power dissipation is a problem, but that would be a failure mode (as in letting the smoke out). Gain is the possible answer. I figure a β would be around 100 or so, but is the software showing less, or am I missing something obvious? I wonder if they were Darlingtons and the bias adjusted accordingly whether it would make a difference? I think the output for 50Ω is pretty decent overall. BTW, thanks EB.