[stevehertz]

Thanks guys. I'm getting the drift. These stats are probably less than meaningful then. I'm not in a position to, neither do I have the technical know-how, diagrams or desire to start comparing circuit diagrams though. So I'll probably use a bit of electronic engineers' common sense re what else I know about the set; era, cost, pedigree, market aimed at, etc etc to give me an idea of tuning 'goodness'.