In article , Andy Evans
wrote:
I assume the following is copied from what I wrote - although it is not
quoted according to the standard usenet practice. Are you able to set your
news client to attribute quotes with article references? If so, it will
make discussions easier.
My vote tends to go for *informed* choice. Hence I'd like people to try
and understand the physical and engineering reasons why there may be
differences
I completely agree. I'm sure you know by now that I hold engineering in
the highest regard. I doubt whether this is practical, however, and this
raises a whole other raft of questions about what we are measuring etc
etc.
The concern I have is that - if the designer/developer feels it is 'not
practical' to fully test and try to understand their design - then they may
be making or using something that is inherently unsatisactory or unsafe in
some way. (see below.)
There are times when it is just a case of 'I prefer A to B' and I don't
think that is intrinsically wrong.
If you are just building for yourself, that choice is open to you. However
it does to me imply a surprising lack of 'intellectual curiousity' in
someone who has the curiousity to spend time seeing if they can develop a
'better' (in terms of preferring it) amp to those on sale. If you are
willing to spend time and effort carrying out experiments, why not also do
them in a more systematic way that might then give you more understanding
of the *reasons* as well?
In practical terms, the advantage of such understanding will be that it
helps you in future to progress more effectively as you have a wider basis
for knowing how to proceed.
If I had the equipment and knowledge and time I'd love to measure
things, but I'm an amateur builder and have limited time to spare. I am,
however, a professional musician and I do know exactly what I'm
listening for, so that's some help.
I agree you need to listen. However I assume you have the basic testgear
of some meters and a decent scope and wavegen. Given these and some test
loads, you can easily do things like check for the stability performance,
transformer saturation, etc, etc. None of this is 'rocket science' despite
what some magazine article may imply. If you doing this already, then
you are dealing with the points I was raising.
Given that you clearly have had the skill and patience and interest, I feel
you would find the above a beneficial approach and you would be pleased to
have expanded your methods in the way I have outlined. You would, I think,
get futher, and also have the good feeling of having a better undertanding.
Slainte,
Jim
--
Electronics
http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc
http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio
http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc.
http://www.st-and.demon.co.uk/JBSoc/JBSoc.html