For phono I have enough space but are really hugh seems a tin Coca-Cola, I bought in an audio shop specialized in tubes here in Spain, are purchased when I used tubes (still I have a pair mono blocks Jadis JA-80 that are without use & heavily modified with BG, Caddock, etc. Now I'm using Borbely two mono blocks 75WRMS Class A solid state)
So big caps they will kill the layout distances by making the reg a giant. Try back to back non polars. Red BG are NP. 100uF total should be enough as well.
Series 50uF Parallel 200uF? I suppose you suggest L-Cancelling Pairs (+ & - one side and + & - the other side = 50uF, ok?
2 100uF NP in series, then another 2, 50+50uF resulting if put in parallel = 100uF. 4 100uF NP in total.
@Salas, so I need 8 caps, fortunately🙂 I have two more caps 100uF/50 BG NP that I don't use. I will keep informed.
P.S. Do you have a Simplistic I/V for current DACs like Sabre32 ESS90018 or Burr Brown PCM1704 if not could you recommend me one? thanks in advance, Felipe
P.S. Do you have a Simplistic I/V for current DACs like Sabre32 ESS90018 or Burr Brown PCM1704 if not could you recommend me one? thanks in advance, Felipe
Yes but without filter, I/V passive with resistor: you don't have to calculate nothing for pcm1704 100R for Sabre Ess9018 200R, you only have to design the discrete jfet output buffer with gain so no digital domain only analog domain?
VRef 100uF BG NP caps more resolution so less noise mixed with signal, compared vs Pana FC 1000uF seems a little less punch almost due to less capacitance, so as always you gain something & you less something or almost it's our subjective way to hear that only remember sensations like our mind. Pana sounds more strong like live rock concerts only loose a little of definition but when you hear voices, sax, trumpets, electric guitarts, classical trios or quartets perform perfectly, the 3D is right there, the NP performs better with classical for example Sinfonic Orchestra you can hear more instruments when playing togheter, seems the system have more wide soundstage the penalty to pay is that no 3D effect is right there only can get maximum 2D for example playing Carmina Burana "O Fortuna" - Carl Orff or Toccata & Fuga - Bach perform better the Pana possible due to his punch really gets the 3D.
I left for a time the NP but surely come back to Pana or will do the V1.2, about V1.2 wich film caps are better: Wima MKP or Solen MKP because I mind not compensate spend more money in boutique audiphile caps?
I left for a time the NP but surely come back to Pana or will do the V1.2, about V1.2 wich film caps are better: Wima MKP or Solen MKP because I mind not compensate spend more money in boutique audiphile caps?
After changed RIAA 16nF silver mica cap for teflon film & aluminium foil 15nF now sounds 3D with BG NP Vref cap instead Pana FC 1000uF (possible are not compatible silver mica RIAA with VRef BG NP) finally get best combo: punch & definition.
Arcotronics PP bypassed by FT-1 faired very well and inexpensively so for 1.2's Vref bypass cap.
Values for Arcotronics PP as per schematics & bypassed FT-1 two zeros less value PP? for example PP 10uF bypassed 0.1uF...
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I used 22n FT1, a Canadian guy reported very good results using FT3 100n, don't remember what base cap he had.
Mind you 1.2 needs good layout practices. Tight. If it is done wrong it will show 250mV 12.5MHz oscillation. You will understand something is wrong even if without a scope because it is going to choke the music in the phono, will sound distant with hum everywhere in the spectrum. If the signal is as strong and clean as before without new noises, its a success.
Today I did experiment on simple man's 1.2 dead bug, so someone can practice easier and learn. I used 10M45S and no trimmer and no films. Significantly lower parts count. The bandwidth is the same, OK the CCS is not as good and can not be set more than depletion's idss, but if its pre filtered with CRC it can make it somehow. It worked alright even with flying crock leads, I set it at 72mA with 33R and 2k2 gate stopper. Could see 1mV of wideband noise with the 10M45S, that I could not with the enhanced mode and its cascode tail of the full 1.2. but could be also due to its just a makeshift toy construction. I show it with DN2540 in schema here which is better, but I don't have in hand.
Attachments
M1 in the schematic. Fast current source to make. Works like JFET, but bigger. Came handy to experiment the rest.
Hi!
Is there such a thing as a definite layout for the original salas regulator?
Is it the one from posting #110, or anything else?
(What a thread! One of these famous endless armadas! 😱 )
Rüdiger
Is there such a thing as a definite layout for the original salas regulator?
Is it the one from posting #110, or anything else?
(What a thread! One of these famous endless armadas! 😱 )
Rüdiger
We came to a proto pcb idea with THKL from Germany for 1.2, said will try it soon some pages back but he did not feedback yet.
That from 110 is OK for V1.0. But that one will never oscillate, has very hefty margin, and its low parts count, you can make it any way you like.
That from 110 is OK for V1.0. But that one will never oscillate, has very hefty margin, and its low parts count, you can make it any way you like.
I already ordered all the parts for a full-on film V1.2
Hope the big output cap does not lead me into layout troubles 🙂
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