Reply To: Universal PreAmp grounding of signal circuits

[Dinx]

Thank you Charles. Latest update: Brought it Friday to have the preamp looked at and worked on by some one that was recommended on canuckaudiomart, an older gentleman who has been in tube radio repair since 1960. He redid all of the signal wiring with bigger shielded cable (nice looking job actually) went over grounding etc, and ‘tested’ before giving it back to me $300+ later… Got home. Plugged unit in. After 3-5 minutes low volume hum started. Same as before. Called, him and asked it he put it on a scope. Not not necessary he said. FYI: This most recent (third) SMPS was shipped from your store to me. I have decided to ‘Throw in the towel’ for now. Frustrating because it sounds just marvellous, except on near silent passages. Time for me to move on… for now anyway. Thanks again. Wish the best to you and your dad.