Related to Step 22: Building a linear PSU
The new PSU had - depending on week day and weather :-) - some small noise issues... it was never really bad... but perceptible... like a 50hz hum and some infrequent "crackles"... I really wanted to solve the problem and was wondering why the new PSU wasn´t better in terms of noise than the old PSU... it has quality components all over... so... back to the assembly table :-)
I'm thinking of building my own PSU using the RetroDonald schematic. Could you be more precise about the improvements you made to it ?