The test setup, such as it was… Readings taken from the transformer output ( a Lundahl 1623, Connected as 5.6k -16 ohms). Into a 16 ohm non inductive dummy load.

I use this setup so I can connect to friends, 8 ohm speakers.

So, after you so kindly pointed out the gross errors. I see that I need a bit more voltage swing on the driver. I will work on raising Va next.

Thanks for your dB refresher course, I guess it’s "use it or lose it" …. Or what was the question again ? ...John