Thanks for the link.
I installed a 4 AMP full wave bridge rectifier in a 2343 Santa Fe F3, following the diagram. Very easy.
Wow, there is no buzzing at all! Its sounds as quiet as an electronic E-unit. However, it still has the pleasant clicking when the pawl goes up and down, and, of course the ozone smell. To me, its the best of old and new.
I now will install an Electric Railroad Railsouds board, and it will not be drowned out by the buzzing E-unit.