>Not when they approve the operating conditions.<
You have a better opinion of component manufacturers than I have!!!!
>> There is another reason, however, and that is that a
> manufacturer can have a subtle (or sometimes not so
> subtle!) change in manufacturing technique that produces a
> major performance change.
I think the problem here is this thread, like many on this
reflector, has had a major performance change.<
You are quite right, of course: a lot of exactly what one does is dependent, as
so often in engineering, on the actual circumstances. I quoted the video amp as
an example of the problems of relying on uncharacterised parameters. Plus the
fact that instructions in an operator's manual are just that: if you add the
engineering justification, you'll most likely find that people ignore it as
'too complicated' and 'can't understand it'
Peter G3RZP (portable I3 this week - and +35 deg C!)
Amps mailing list