Great! Leave them in. Now Ricardo will have a base. 3.3K sharp R1 load resistor for each channel. Its very important, because it reflects the output impedance of first stage. Now if you give it a listen, I expect it to be more focused. For the time being if you feel it is on the soft side too, take the extra caps out of C3's base value, it will pick up in the high mids and treble, until you will do your precise values and maybe resistor types fix with Ricardo. Let me know if it got better.
Removing C3 // will lift highs but IMO If you got 3k3 for R1 you can go back to post http://www.diyaudio.com/forums/analogue-source/129126-simplistic-njfet-riaa-328.html#post2120924
Let us know your final choice.
Let us know your final choice.
Ok now Left channel 10.97V Right channel 11.14V. Taked out the extra caps of C3's now only 1 cap 15n6. Changed R1 trimmers in both channels for fixed resistor Xicon carbon film 3K3. Let me tonight to hear, tomorrow I will let you know.
Ok I will go back to post for matching RIAA both channels with R1 3K3. Let me time see if I have combination of resistors & caps on hand to do the request values.
Thks for your kind help, I will let you when I can do the setup.
Mine LCR can be adjusted with a pot, so when connect togheter + & - I adjust to get exactly 0.00 ohms, other way is check a very good resistor of a tigh tolerance 0.025% or 0.0025% I remember that I have one Vishay like this but now I don't know where is, is not a S102K was another cheaper sell in England I don't remember the series but was also bulk metal foil.
Non matched is: R4 Left channel 6k80 - Right channel 6k79
Now you are really entering the fun part.
I started by fidling with C3 (16n) to get rid of some high freq proeminence, than I tampered with C2 (47n) to get more bass but found that I could easily loose "snap".
After that I found that lowering R4 (6k8) I could get loads of mid detail (around 1000kHz)
When I lowered R3, I discovered I could get much more overall body and presence.
After a very long period of trial and error experiments I put all the formulae in a spreadsheet and now I can really predict a good result based on the real values measured with a dependable LCR. (Math and spreadsheets are my core speciality)
With your actual values I would certainly bypass R3 with some 1Mx values ... That will bring loads of presence increasing bass and trebble a lot so I would keep C3 at 16n (under 16n the sound will become edgy).
But you need to increase C2 (between 450p 470p) so you do not loose "snap".
Let me know how it sounds after this.
I started by fidling with C3 (16n) to get rid of some high freq proeminence, than I tampered with C2 (47n) to get more bass but found that I could easily loose "snap".
After that I found that lowering R4 (6k8) I could get loads of mid detail (around 1000kHz)
When I lowered R3, I discovered I could get much more overall body and presence.
After a very long period of trial and error experiments I put all the formulae in a spreadsheet and now I can really predict a good result based on the real values measured with a dependable LCR. (Math and spreadsheets are my core speciality)
With your actual values I would certainly bypass R3 with some 1Mx values ... That will bring loads of presence increasing bass and trebble a lot so I would keep C3 at 16n (under 16n the sound will become edgy).
But you need to increase C2 (between 450p 470p) so you do not loose "snap".
Let me know how it sounds after this.
After a very long period of trial and error experiments I put all the formulae in a spreadsheet and now I can really predict a good result based on the real values measured with a dependable LCR. (Math and spreadsheets are my core speciality)
So you made a spreadsheet especially for the Simplistic based on subjective trimming of the Riaa values? Amazing.
That's a lot of work. And it works for all sensitivity ccts? What about when changing VTA or preamp? Does it still work better?
Forza Inter
Thank you! Very helpful!
Should we "fight" once again against Barca this year but in Madrid?
Well to be sure better send the LCR to Farnell or Applus or other company to calibrate or better to buy a real proffesional machine like this:
DIGIMESS|RLC300|MULTIMETER, DIGITAL, LCR, 0.1% | Farnell España
An externally hosted image should be here but it was not working when we last tested it.
Well as said my mother "dream don't cost money"
But for me the measurement is a 1st approach, I decided do the final tuning by hear like mine friend Ricardo do
So you made a spreadsheet especially for the Simplistic based on subjective trimming of the Riaa values? Amazing.
There is still room for improvement but now I can predict the effect of very slight changes in the riaa eq components without the need for long listening periods.
IMO the correct values are much more important than the quality of the components (A finetuned riaa with silmic sounds much more spacious than a poorly tuned one with fullon BG build). For example you can easily loose mid freq detail just by an error of 40ohm on R4(6k8r) and you can loose bass snap by an error of 50p on C2 (47n))
VTA changes are more effective now.... I did not have the oportunity to try another preamp but I have now the same degree of sumptuousness in all my three different gain builds.
Thank you! Very helpful!
Should we "fight" once again against Barca this year but in Madrid?
Will be a great final match