Thanks - I hadn't seen it before. Jim was discussing this on another thread,
i.e. the relevance of harmonics to the overall sound, with reference to the
article by Hiraga in HiFi News which was quite a while ago (?70s). Typical
harmonic profiles of several common valves can be seen he
http://www.enteract.com/~joepage/tubelist.htm
Look, for instance, at the harmonic spectrum of the 6P5GT - nice!
http://users.rcn.com/joepage/6P5GT.jpg

=== Andy Evans ===
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