Fred Nachbaur wrote:

I stay with reasonable input capacitor values (usually around 100 uF)
and choose a transformer with 50% higher rating than the DC current I'll
be drawing, so far that rule of thumb has always worked out. However, if
I'm using Hammond transformers, I'll push them closer to the limit
because they are more conservatively rated.

As far as I remember the current ratings on Hammond transformers (at
least the plate winding) are DC ratings based on a cap input filter.

Best regards,

Mikkel C. Simonsen