what determines the ring output?

Now the question is "what's going on in the ring and how to 'match' it?".  When I made the secondary half what it was the output responded so the next step was to reduce it more. It seems the diodes need more current.

 In spice you can open the window menu and select set reference to set the negative probe. Here I set the probe at the center tap on the secondary. I measured the top of L2 and ground and that equals the output so whatever is on L2 - l3 is equal the output.