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Simplistic NJFET RIAA
Simplistic NJFET RIAA
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Old 31st December 2012, 12:38 PM   #8901
le´flu is offline le´flu  Germany
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Hi salas and all,

just came across this thread again i´m just curious how the
folded simplistic will compeed against my build njfet version.

As i have most of the parts in my boxes i´m just thinking
about the sslv1.1. What version did you exactly recommend at
the moment? And yes i have a pair of BiB-boards as well

greetings and all the best for 2013

Ulf
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Old 31st December 2012, 03:33 PM   #8902
Salas is offline Salas  Greece
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Simplistic NJFET RIAA
It will be better if you got in mind some compatible circa 0.5mV MC cart for it. Its been tested with BiB, so its fine.
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Old 31st December 2012, 06:55 PM   #8903
le´flu is offline le´flu  Germany
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Hi Salas
i think i explained my selves wrong ...

Quote:
Originally Posted by Salas View Post
It will be better if you got in mind some compatible circa 0.5mV MC cart for it. Its been tested with BiB, so its fine.
At the Moment i´m using an ortofon vero which is o.5mV Vout. But what kind
of BiB Version did you use? (By the way to what current should the BiB set?

Greetings and a happy new year

ulf
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Old 31st December 2012, 07:09 PM   #8904
Salas is offline Salas  Greece
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SSLV1.1, the one that comes in a breakable PCB triplet. Best wishes from here too.
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Old 31st December 2012, 07:10 PM   #8905
Salas is offline Salas  Greece
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P.S. Current at about 200mA CCS per channel leaves very good spare.
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Old 4th January 2013, 11:01 AM   #8906
RCruz is offline RCruz  Switzerland
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Simplistic NJFET RIAA
The conversion was a total success. Just finished modding my 48dB 28V reference build with the new folded cascode input, running at 35v.

As for repeatibility so far so good. Ultra low noise, ample gain and sounding even more dynamic than the "Wallis experiment".

I did not touch the riaa filter (just adjusted the 47k to suit better the 2k2 folded cascode load)

On second stage I use 2k2r feeding the buffer so I get 10v out of second stage and 20v over the buffer. (I had to build a BiB to power a breadboard where I reproduced second stage to find the best resistor combinations)

It is sounding really serious right now....
Pics latter

Learning question: How high output can I choose for a cart with this configuration ?
What happens If cart output is too high.. clipping ?

Why did it not happen with the "normal" simplistic ?
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RC
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Old 4th January 2013, 11:54 AM   #8907
massimo is offline massimo  Italy
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Ricardo, do you use a pair of SSLV 1.2R even in this project?
I read you are going to build a SSLV 1.1, are you going to compare that shunt reg vs the 1.2R?

P.S. 2k2 in lieu of 1.8K (R11) ?

P.P.S. Happy new Year!
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Old 4th January 2013, 11:57 AM   #8908
merlin el mago is offline merlin el mago
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massimo if you do 1.2R have near the scope to check oscillation, I did both & I prefer V1.2R vs 1.1

Have a Happy New Year.
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Old 4th January 2013, 12:19 PM   #8909
massimo is offline massimo  Italy
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Happy New Year 2U2, Felipe!
Basic instruments such as scope, DMM, oscillator aren't a problem
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Old 4th January 2013, 12:39 PM   #8910
merlin el mago is offline merlin el mago
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Good luck.
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