hexferds, or schottkys?

i have an adcom GFP750 preamp......it has 1n4007's , in the bridges, what wud be the best upgrade? part #'s and where to get 'em...........tnx, clawed
You might read this article:


Shottky's are generally considered to be quieter than Hexfreds (note spelling) but I did not find so much difference between them as the (obvious) upgrade from the stock rectifier bridge was.

My experiments were with tube gear, specifically the Atma-Sphere M-60 and Tube Research GT 400. In my opinion, either is a huge step up from stock. Available from Michael Percy at his web site: