Finally I reached my target. The enhanced simplistic is a true stepup from the "regular" design.
I am allready used to the inherent wide soundstage, fluid mids and highs and total integrity of the simplistic sound and now I got a powerfull detailed bass due certainly to the increased detail provided by the new input stage.
There are no drawbacks... nothing is lost, I only notice an overall improvement in the allready outstanding performance.
Care must be taken to build a good electromagnetic screen over the amp but that is all.
Reaching nearer Nirvana all the time 🙂
I am allready used to the inherent wide soundstage, fluid mids and highs and total integrity of the simplistic sound and now I got a powerfull detailed bass due certainly to the increased detail provided by the new input stage.
There are no drawbacks... nothing is lost, I only notice an overall improvement in the allready outstanding performance.
Care must be taken to build a good electromagnetic screen over the amp but that is all.
Reaching nearer Nirvana all the time 🙂
A fresh round apple in your fruits collection. Congrats.🙂
After I will examine it thoroughly myself too, I will put a couple of final instructions about.
After I will examine it thoroughly myself too, I will put a couple of final instructions about.
Hi Ricardo
I think you have a realy valid point here IMO.
I have been in the last few weeks, collecting & matching, large quantitys of WIRE-WOUND resistors for a build.
It seems to me the only 'logical' way forward ( Captain ).
There seems to be endless 'rattling on' about noise-performance, of relative Op-Amps & trannys in this forum...
...But when have you ever seen anyone build with WIRE-WOUNDS ?...
...I never have.
You build valve-gear with WW's ( particularly the high-values ), BOOM !!!!
INSTANT better performance...
...I am thinking mostly, microphones & mic-pre's here.
Not so much power-amps; but why not as well...
...particularly again, the 'high-values' that are always needed in valve circuits.
People seem to want to use carbon all the time...
...OK better stability for HT stuff...
...why not just use 'wire' though.
Been looking at resistors a lot this week.
Found in my stock a bunch of 'brand new' carbons...
...ALL drifted UP by as much as 20%; never even been in a circuit.
I also found a large number that were 'open circuit' or of MegOhm type values.
I'm sure people have done this, of course...
...just 'disected' a bunch of WW, carbon & Hi-Stab. glass resistors to see how they are made...
...well...
...it makes any use of 'oxygen-free' & 'silver-wire' seem slightly redundant.
Just 'wire' in the WW's though.
I'd be interested to see what you think of your new 'SUPER-Simplistic' with a FULL compliment of wire-wound resistors ( including ALL power-supply ones as well ).
I know you can do it Ricardo !!!
Cheers.
Si.
Guys. what caps would you recommend. I am looking at Multicap RTX vs Auricap XO, although I would consider others.
Not much noise from me here
Got few things cooking and prety cold in the loft
But came spring I probably have enough savings for ....
Teflon® Film Capacitors | Oil Capacitors by V-Cap
Got few things cooking and prety cold in the loft
But came spring I probably have enough savings for ....
Teflon® Film Capacitors | Oil Capacitors by V-Cap
Hi Si
Off course it could be done if we could find suitable small and inexpensive WW.
Particularly for the Rs, one could use two WW wired in parallel in reversed directions to minimize any inductance.
For RIAA caps looks for precision 1% or better, VISHAY-RODERSTEIN MKP-1837 Metalized Polypropylene Film Capacitor is a good an economical choice.
Figured I would trim values with smaller hug precision bypass. Mkp1837 is good cap, but I would tend to think RTX would be better.
If parts connection is able to match RTX, I would certainly try those. Tinfoils are really good for the riaa caps.
I use RelCap polystyrenes / tin foil that Michael Percy sends me matched.
Off course the MKP 1837 are a good economical choice.
Styrenes are better if you are sure tolerance is 1% that isn't the same matched, matched only guarantees are with same value. MKP1837 are also foil better than metallized,
Hi Merlin
Tolerance gives us an idea of the deviance from spec due to manufacture... that is why we match the caps. If we get two caps exactly the same value (say 15nF) one 20% tolerance and the other 1%, there will be no difference at all.
Tolerance gives us an idea of the deviance from spec due to manufacture... that is why we match the caps. If we get two caps exactly the same value (say 15nF) one 20% tolerance and the other 1%, there will be no difference at all.
Sorry Ricardo I don't agree, if the cap is manufacturated with 1% is more accurate than if you match the caps.
That is a strange thought.
If both caps measure exactly the same why do you believe one is more acurate than the other ?
Because if the cap is 1% tol. rated can't change the value easily so is more stable, if you only match the cap don't guarantee the stability so the cap can change the value when is working.
Maybe, but if the caps are matched and exhibit exactly the same value (and they are build with the same materials) they should vary it´s capacitance only due to it´s Temperature Coefficient.
IMO the tolerance is there only to enable the manufacturers to sell caps according to their spec sheets.
Polystyrenes are very stable and do not drift mutch... the only issue is that when we get a lot of 5% styrenes it is fundamental to match them because the same batch brings us 5% variation of specified value.
IMO the tolerance is there only to enable the manufacturers to sell caps according to their spec sheets.
Polystyrenes are very stable and do not drift mutch... the only issue is that when we get a lot of 5% styrenes it is fundamental to match them because the same batch brings us 5% variation of specified value.
Look here: WIMA
"Capacitance Tolerance
Tolerance is the permissible relative deviation of the capacitance from the rated value, expressed in per cent. The tolerance is to be measured at a temperature of +20°C and is only valid at the time of delivery.
After a longer period of storage or use, the tolerance can increase; but, according to standard specification, it may never exceed twice the value measured at the time of delivery.
The following delivery tolerances are usual for wound capacitors:
±1%; ±2.5%; ±5%; ±10%; ±20%.
In the case of electrolytic capacitors for which the largest possible capacitance matters, tolerances of +100/-20% also occur."
"Capacitance Tolerance
Tolerance is the permissible relative deviation of the capacitance from the rated value, expressed in per cent. The tolerance is to be measured at a temperature of +20°C and is only valid at the time of delivery.
After a longer period of storage or use, the tolerance can increase; but, according to standard specification, it may never exceed twice the value measured at the time of delivery.
The following delivery tolerances are usual for wound capacitors:
±1%; ±2.5%; ±5%; ±10%; ±20%.
In the case of electrolytic capacitors for which the largest possible capacitance matters, tolerances of +100/-20% also occur."