Hi Paul
Thanks for the info. Not being into Naim ( I prefer valves to solid state) I must confess to having poor knowledge of the product or its history. However my first thought was that the early Naim players used TDA 1541 but I then doubted myself. Had a hunt and couldn't find info to confirm this, but only to put doubt on it. Sometimes ones first thought is the right one...though not always.
Bottom line, glad your players back fixed....
Regards D S D L---Neil