On 12/11/2014 09:39 AM, Jim Lesurf wrote:

I can understand that approach with a valve amp where there is an
output transformer involved, but matching with a transistor amp? Eh?

I'm not clear what "matching" means above. An engineer would probably
assume "arrange for the two impedances to be equal". However it may have
been used more vaguely, akin to "suit one another" in some other way.

I used 'matching' in the more general form not the specific electrical
engineering way. In the circumstances I was describing the book was
recommending measuring the output resistance of the amp (and presumably
cables) so that the exact figure for electrical damping could be used.

Now - say I was to build a transmission line...


Pete