Salas sugestion was made before we knew about your true riaa values.
The three resistors R1 R3 and R5 interact so when you // 1M4 on the Left, you do not get only 45k473.... the riaa circuit "sees" 46k755.
If you input this value on the calculator http://www.kabusa.com/riaa.htm
you will get caps values that will sound acording to Lipshitz
For the right channel, my best bet would be // 1M9 so the final R would be 46k684.
Experiment with 2M as suggested by Salas, than finetune using lower values until you get the best results and let me know your findings.
After we set the correct values we can think about replacing with good resistors.
This is an aproximation based on my listening experiences and following closely all of Salas sugestions.
IMO The calculator kabusa can only be correctly used if the input resistor value is calculated acording to this formulae: R equals (R1 + R3) paralleled with R5
R =1/((1/(R1 + R3)+(1/R5))
IMO The calculator kabusa can only be correctly used if the input resistor value is calculated acording to this formulae: R equals (R1 + R3) paralleled with R5
R =1/((1/(R1 + R3)+(1/R5))
George cooks, Merlin cooks, Massimo cooks: should we open a Mediterranean Restaurant?
The very best from Greek, Spanish (OR Catalan if you prefer) and Italian cusine!
Well the real problem now is not the cook, is where open our famous Mediterranean Restaurant
George cooks, Merlin cooks, Massimo cooks: should we open a Mediterranean Restaurant?
The very best from Greek, Spanish (OR Catalan if you prefer
You forget Rcruz (cooks mathematics) & Salas(cooks electronics)
As per Salas design will be?
R = 3.300+47.000 // 1.000.000 = 47.891 R1 input Kabusa calculator
Kabusa R1 47.891 - R4 6.963 - C2 45nF664 - C3 15nF661
R4-C2-C3 are Salas schematic
So I suppose that in the design select closest standard values.
Mine real situation without changing nothing is?
Left
R = 3.300+47.000 // 1.130.000 = 48.156 input Kabusa R1
Kabusa R1 48.156 - R4 7.002 - C2 45nF412 - C3 15nF574
Right
R = 3.300+46.800 // 998.000 = 47.705
Kabusa R1 47.705 - R4 6.936 - C2 45nF842 - C3 15nF722
I am really enjoying.
Last edited:
George cooks, Merlin cooks, Massimo cooks: should we open a Mediterranean Restaurant?
The very best from Greek, Spanish (OR Catalan if you prefer
Well, I already have a restaurant with greek food in my hotel!
If any of you comes here, I' m offering a free lunch or dinner.
Attachments
Nearly..... in a Golden hotel, with a Golden restaurant over the Saronic Gulf
Ricardo can bring his Grandma's recipies for Bacahlau
and Salas, the Master, will be our maître....
As you can see, with your actual setup R4 should be 7k
With your actual values the sound will be recessed.... You can either increase R4 or reduce R3 as I sugested before. (IMO The easier way)
Nearly..... in a Golden hotel, with a Golden restaurant over the Saronic Gulf
Ricardo can bring his Grandma's recipies for Bacahlau
Will be the perfect meeting.
I'm living here:
An externally hosted image should be here but it was not working when we last tested it.
Thks for the offer
, I haven't a Restaurant but also can offer a free lunch or dinner not as selected than yours but I will do mine best.
IMO will be easy to parallel 91k (Shinkohs, Takman carbon film, Kiwame 2W & Vishay VTA55 all availables at Pcx) or 91k1 (Vishay VTA55 available at Pcx) to get 45k5 or 45k5 near the values neededs for R3 with good quality resistors, also don't mix different kind of resistors. 1M & over I usually look for at Caddock MK132 or TF-USF series but can't have these values.
Hard to find some 1M9, I get 1M4 at Mouser Xicon metal film 1% 50ppm:
270-1.4M-RC Xicon Metal Film Resistors
Last edited:
He will surelly have to review if he changes the 47k a bit. In general, tuning steps start after final configuration of build AND TT settings, loading. Riaa values resistor trims are initially tried with cheap components, system sensitive stuff you never know your own best before hand. In my experience most builders end up around 16n C3 indeed.