[sdiy] The sound of various Op-Amps

[fmg]

harrybissell wrote:
> 
> 
> Just to mention a funny (true) story... many years ago I took apart my
> 360 Systems "Slavedriver" (guitar interface) and decided to replace the
> 4558 opamps (which I somehow associated with being a cheap part
> like the 1458)... with "something better".  After unsoldering all six preamp
> chips... I got the data book out and found that I didn't HAVE any better
> chip to replace them with. So I put in sockets and stuck the same chips back
> in where they live to this day.  :^P
> 
> Now I replace a chip only when I'm certain that it is the WRONG chip for
> the circuit.  Usually, most designers of commercial products use the right chips
> 
> so its very seldom that I can make any improvements
> 

Aha... I fell in a similar situation some (not too many) years ago when tried to
*improve* a 4558 based mixer. I never trusted in datasheets noise specs then
decided to use a solder sucker and my ears to see what happens...

After several tries the "improvement" finished with a socketed 4558 based mixer.

(No matter the age, there is always enough room to feel oneself stupid)

Fabio