In article ,
Iain Churches wrote:

[snip amp details]

The IM and THD charts that come with the manual are blank
and marked "Disclosure prohibited 4.11.1974"

I must confess I burst out laughing when I read that! Did they think the
detailed distortion performance of their amp was a 'trade secret' and that
no-one should be allowed either to know the spec or measure it for
themselves?!

8-]

Jim

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