If you haven’t already, try some ultrafast/soft recovery HEXFREDs first. Much simpler, and may satisfy your desire for improved sound. ie: (http://www.partsconnexion.com/rectifier_diode_fred.html) &(http://www.partsconnexion.com/rectifier_bridge_hex.html) There’s a blurb on potential benefits, on this page: (https://www.caryaudio.com/upgrades-and-modifications/)
Converting Solid State to Tube Rectification on a Preamp
I am looking to convert my Preamp from a Bridge Rectifier to a Tube Rectifier. Any members have done or knows how to do this. Your help are much appreciated!