Jim Lesurf wrote:
In article ,
bcoombes
bcoombes@orangedotnet wrote:
Ian Iveson wrote:
Jim Lesurf wrote:

I've just put up a new web page at

http://www.audiomisc.co.uk/HFN/Squar...quareDeal.html

that looks at the use of squarewaves for assessing amplifiers, etc.
You conclude that reviewers have abandoned the square wave, but did
they ever use it much anyway?

Without in anyway claiming to be an expert on these things I vaguely
seem to remember that most amp tests in the HI-Fi mags of the 1970's
and 80's had a square wave read out printed somewhere in the test. I
also *seem* to remember these were at 1k ...but of course these are
distant and increasingly dim memories.

I can confirm they did. Partly because I have a bookcase full of old issues
of HFN just beside me as I type. Also because I was working on developing
power amps at the time 'TIM' appeared on the scene and there was a brief
flurry of panic until people realised it was a 'problem' that decent design
solved with trivial ease.

Ah yes bit's all coming back to me now, there were a bunch of us at work who
were 'into hi-fi' and we'd spend much time studying the slew rate figures from
various amp tests and then deciding which one we'd like to own. ISTR that
Radford amps were the ones to die for back then.