I didn't bypass the IC's 3&4.
Yes, there was a significant lowering of the noise floor. After all, the power supply quality is one of the most important parts.
... which will stay there until I can get a 'better' one working in that position. I tried the 'better' ones, which sounded pants. Once I feel up to it (poor health) I will try them with various bypass caps in various positions and see.
Also I think you are wrong. The power supply is the one part that can make or break an amplifier. If it was as easy as having the best amplifier chips powered by a rubbish PS, then everyone would be doing it that way.
You think or you know?!
Have you checked anything of what you repeat?
The argument that majority not doing so is absurd..
They all do the same thing. That does not mean they do it the same way...
I have not checked different opamps (on their way now), but for capacitors I can wholeheartedly say that they do make a difference and not a subtle one...
I disagree, HI-FI is like any other electronics, there is physical laws applicable to all.. there should not exist more correct opinions..
As long as the taste argument in the evaluation of a device, there is no room for any improvement..
Electronics is progressing, only Hi-Fi industry used some components abandoned half century ago..
In that case there would only be one way of making an amplifier. As that is clearly not the case, taset MUST come into the equation
I disagree.. there are countless ways to make amplifier, each will be different, better or worse..
Precisely, we find the problem.. instead there are some standards, everything is left to the subjective impression.. so often we are convinced that something bad is great..
If we want serious approach the issue, we must know what we listen.. than you realize that generally what you thought was good, in fact distortion and harmonics..
And
Perhaps I'm misunderstanding you but...
So glad someone can finally tell me what it is I like. If I'd only known! All I had to do was ask the "experts" like you...
And the primary motivation of any industry is the highest quality product instead of the bottom line? No doubt that was the reason the HiFi industry started moving toward solid state. I see, I see.
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I did not wrote about quality of parts..
I wonder would you buy a laptop or a TV with tubes, output transformers or paper in oil half century old capacitors.. only in HI-FI someone use such nonsense.. of course, with argument of subjective experience, that is totally worthless..
Here man did not know how to implement a fast chip, then immediately rushed to declare OPA27 better than AD797..
Do you believe his subjective experience or measurements and datasheet?
Did you say
No you didn't. I posted my findings as I found them, vis:-
Guys what would be better for bypassing the VSPS for AD797?
Get one 100nF cap between pins 4-7 in the socket with really short leads?
Or stick two caps, one on each pin 4 and 7 and send a longer lead to the ground?
Oh and does it make sense to replace one of the 100uF electrolytics with a 1uF tandalum? Again as per the datasheet bypassing instructions
Get one 100nF cap between pins 4-7 in the socket with really short leads?
Or stick two caps, one on each pin 4 and 7 and send a longer lead to the ground?
Oh and does it make sense to replace one of the 100uF electrolytics with a 1uF tandalum? Again as per the datasheet bypassing instructions
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I have NEVER claimed that I know best. I just posted my findings. You said that the AD797 would work as IC1. Clearly is doesn't, as my findings show. However, you say it will work if a cap is added across R1.
If you had mentioned that at an earlier stage than you did all of this would have been avoided.
WHEN I feel up to the task, I will add a cap across R1 and try again.
As previous I will post my findings. They may agree with yours, they may not. It does not mean that one of us is wrong, it simply means that we are looking for different things. I am open minded enough to try different things, but if they do not work FOR ME I will not hesitate to say so.
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