Quad 303 mods question
Posted Monday, October 29, 2007 at 6:32 PM

I have 3 Quad 303s two of which I did some mods on about 4 years ago. The other one I left as a reference for comparison.

One of the Quad mod articles I read back then suggested replacing the Rectifier diodes with Schottkys. I did this and it seems OK.
It has been suggested to me that I should have replaced the old ceramic plate capacitor which Quad put across the transformer outputs and there may be some other components I should have added into circuit, to cope with the special characteristics of Schottkys as opposed to the original Quad diodes but I don't know what these should be.

Anyone have any suggestions?