Silent Fly wrote:I try to be Devil’s advocatehere but why build an op-amp using discrete components when there are so many IC versions that are already built with matched components, temperature compensation, frequency compensation and everything they needs to work. This without considering that the IC versions are probably cheaper, smaller, more reliable and easier to replace/debug if something goes wrong.
I understand in the old days where the best the industry could offer was the 741. It can make some sense today if there is a high current requirement but for low-power audio devices, what’s the point?![]()
Moreover, there are so may types/brands/models of op-amp that I can’t think to an application or requirement that it is not covered. The problem is that probably there is too much choice.
Silent Fly wrote:why build an op-amp using discrete components when there are so many IC versions that are already built with matched components, temperature compensation, frequency compensation and everything they needs to work. This without considering that the IC versions are probably cheaper, smaller, more reliable and easier to replace/debug if something goes wrong.
UZILSD wrote:that the interesting thing is the capability of building a "worst" opamp, from an hifi viewpoint. I'm thinking of putting germanium transistors in it for example, ot tweaking things in a non canonical way.
Jarno wrote: but these use 2SK389, now obsolete/ even when not obsolete hard to get/ expensive, double fets.
UZILSD wrote:Silent Fly wrote:I try to be Devil’s advocatehere but why build an op-amp using discrete components when there are so many IC versions that are already built with matched components, temperature compensation, frequency compensation and everything they needs to work. This without considering that the IC versions are probably cheaper, smaller, more reliable and easier to replace/debug if something goes wrong.
I understand in the old days where the best the industry could offer was the 741. It can make some sense today if there is a high current requirement but for low-power audio devices, what’s the point?![]()
Moreover, there are so may types/brands/models of op-amp that I can’t think to an application or requirement that it is not covered. The problem is that probably there is too much choice.
I agree.
But I think that the interesting thing is the capability of building a "worst" opamp, from an hifi viewpoint. I'm thinking of putting germanium transistors in it for example, ot tweaking things in a non canonical way.![]()
Hifi world and guitar gears world are antithetical. In a guitar amp even a clean sound is unacceptable distorted for hifi standards. What made and makes the electric guitar sound is imperfection.
Anyway, experimenting a little bit with discrete opamps is higly instructive I think, it would make one more aware of what there is in those little black boxes.
briggs wrote:I put a Ge tranny in the boss discrete opamp. Sounds great.
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