Simplistic NJFET RIAA - Page 891

le´flu · 31st December 2012, 12:38 PM

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

Salas · 31st December 2012, 03:33 PM

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.

le´flu · 31st December 2012, 06:55 PM

Hi Salas
i think i explained my selves wrong ...

Quote:

Originally Posted by Salas

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

Salas · 31st December 2012, 07:09 PM

SSLV1.1, the one that comes in a breakable PCB triplet. Best wishes from here too.

Salas · 31st December 2012, 07:10 PM

P.S. Current at about 200mA CCS per channel leaves very good spare.

RCruz · 4th January 2013, 11:01 AM

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 ?

massimo · 4th January 2013, 11:54 AM

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!

merlin el mago · 4th January 2013, 11:57 AM

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.

massimo · 4th January 2013, 12:19 PM

Happy New Year 2U2, Felipe!
Basic instruments such as scope, DMM, oscillator aren't a problem

merlin el mago · 4th January 2013, 12:39 PM

Good luck.

4th January 2013, 11:01 AM	#8906
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	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 ? __________________ RC

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31st December 2012, 12:38 PM	#8901
le´flu diyAudio Member Join Date: Mar 2004 Location: Hoexter	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

31st December 2012, 03:33 PM	#8902
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	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.

31st December 2012, 07:09 PM	#8904
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	SSLV1.1, the one that comes in a breakable PCB triplet. Best wishes from here too.

31st December 2012, 07:10 PM	#8905
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	P.S. Current at about 200mA CCS per channel leaves very good spare.

4th January 2013, 11:54 AM	#8907
massimo diyAudio Member Join Date: Dec 2002 Location: Milan, Italy	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!

4th January 2013, 11:57 AM	#8908
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	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.

4th January 2013, 12:19 PM	#8909
massimo diyAudio Member Join Date: Dec 2002 Location: Milan, Italy	Happy New Year 2U2, Felipe! Basic instruments such as scope, DMM, oscillator aren't a problem

4th January 2013, 12:39 PM	#8910
merlin el mago diyAudio Member Join Date: Sep 2009 Location: Catalonia new Europe state	Good luck.