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Old 29th October 2010, 04:27 PM   #5151
Salas is offline Salas  Greece
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Quote:
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Sorry, I don't understand. Can you please rephrase it?
It will give much gain for a pre pre if you parallel more fets I said. And if you use K170GR to keep the current and Gm the same, noise will be almost like with 2xK170BL. To really go very low en, general integration of techniques for PSU cleaning and circuit PSRR redesign will be out of this thread's concept. For practical vinyl replay purposes, this level of noise is very good to most users.
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Old 29th October 2010, 04:42 PM   #5152
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Quote:
Originally Posted by Salas View Post
It will give much gain for a pre pre if you parallel more fets I said. And if you use K170GR to keep the current and Gm the same, noise will be almost like with 2xK170BL. To really go very low en, general integration of techniques for PSU cleaning and circuit PSRR redesign will be out of this thread's concept. For practical vinyl replay purposes, this level of noise is very good to most users.
Thanks.
So, it seems like it will be beneficial to cascade the 2 x K170 in parallel, or to add a CCS for the B+, for the sake of better PSRR. Is that right?
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Old 29th October 2010, 04:55 PM   #5153
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Exclamation Wiki for Salas Simplistic NJFET RIAA

Hi guys,

Created a new wiki with all schematics (thank you Salas) & psgr pdf (thank you Iko), link:

Salas Simplistic NJFET Riaa Schematics - diyAudio

Enjoy.

Last edited by merlin el mago; 29th October 2010 at 05:13 PM.
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Old 29th October 2010, 04:57 PM   #5154
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If you add a drain CCS it will lock it. Won't work.
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Old 29th October 2010, 05:18 PM   #5155
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Quote:
Originally Posted by merlin el mago View Post
Hi guys,

Created a new wiki with all schematics (thank you Salas) & psgr pdf (thank you Iko), link:

Salas Simplistic NJFET Riaa Schematics - diyAudio

Enjoy.
Thanks. Great work.
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Old 29th October 2010, 05:19 PM   #5156
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Originally Posted by Salas View Post
If you add a drain CCS it will lock it. Won't work.
Thanks.
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Old 29th October 2010, 05:49 PM   #5157
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Originally Posted by Joshua_G View Post
Thanks. Great work.
A Salas tribute, waiting to be usefull for all people
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Old 29th October 2010, 06:04 PM   #5158
Salas is offline Salas  Greece
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Thanks for collecting the various schematics Merlin, but without the what and how of each one its possible they will overwhelm the casual visitor. They are just a collection of adaptations to specialities. Values revolving around IDSS stash and sensitivity needs or priorities of individuals. Variations on a theme. Useful for picking especially if having some whatever Jfets or cart. Those linked from post one are well grouped and ironed out though. And should be the ones to be considered general.
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Old 29th October 2010, 06:12 PM   #5159
Salas is offline Salas  Greece
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And now (drum roll)... The 0.2nVrtHz unobtanium 10xK363V folded cascode symmetric parallel, Sziklai buffer cleaned, CMRR canceled, DC coupled OPAMP servo 70dB one! Nah...this thread is about simple.
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Old 29th October 2010, 06:12 PM   #5160
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Thanks to you to support the thread.

Yes I know that depends stash njfets Idss, cart output, etc. I only wanna do a previous guide to people with a cart wanting something to have an idea to start, including psgr pdf (thanks again Iko).
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