Here are a couple of PS designs that Norris, Jef, and I have contemplated for the Darling amp I'm building. I have both of the chokes and some 25uF motor runs, but that's it for now. The first PSUD pic is using a Hammond 270DAZ trannie. The second choke loaded is using a 273X.

.. I'm looking to get around 270V on the B+. and will be running a 5965 driver. 25-26mA on the 1626 and 4mA per side on the 5965.

How about this. Use the 10H choke first with a 40uF cap, then branch off with individual 4H chokes and another 40uf cap per channel?

Also, I've seen where some have put a very small value cap between the rectifier and PT secondaries? But obviously no way to model this in PSUD.

The supply you propose will work well.

As to the cap across the secondary. If it is a very small value, .1uf or so it is there to shunt power line hash. Not a bad idea at all. A larger value is a "cheater cap" used to tune the output voltage.

A pure choke input filter will give you about 66% of your transformer secondary voltage. A cap input about 140%. As you increase the size of the cap you move from one mode to the other…John