Simplistic NJFET RIAA - Page 570

SGregory · 30th December 2010, 01:21 PM

In looking at that, I am having a hard time understanding how that would work. I would think the three error amps could fight each other and not be able to do their jobs.

Salas · 30th December 2010, 02:33 PM

They are supposed to be looking on separated load nodes. Or at least that is what I thought was the idea. I would prefer to give chance to a dedicated first stage low Z active noise filter on the rail than all this complexity and dissipation non the less.

RCruz · 30th December 2010, 06:07 PM

Quote:

Originally Posted by massimo

see attachment

Now this looks like a good idea.

RCruz · 30th December 2010, 06:08 PM

Quote:

Originally Posted by Salas

They are supposed to be looking on separated load nodes. Or at least that is what I thought was the idea. I would prefer to give chance to a dedicated first stage low Z active noise filter on the rail than all this complexity and dissipation non the less.

Even better idea... would you please explain how to build such a filter ?

Salas · 30th December 2010, 06:13 PM

Don't know yet, I have a bunch of extremely low noise BJT types that I will have to experiment with in a future build opportunity.

RCruz · 30th December 2010, 06:32 PM

I am ready for beta testing.... please let me know if I can mod over my previous build

massimo · 30th December 2010, 06:40 PM

Quote:

Originally Posted by Salas

I would prefer to give chance to a dedicated first stage low Z active noise filter on the rail ....

Are you thinking about a cap multiplier similar to the one used in the Paerl phonostage?

Salas · 30th December 2010, 07:21 PM

Its not satisfactory for Zo. Maybe to cascade 2 Sziklai buffers.

nicoch58 · 30th December 2010, 07:59 PM

YouTube - How to play a record with no electricity

2011 project

SGregory · 30th December 2010, 09:10 PM

You could use wool felt to set up the RIAA and control noise

30th December 2010, 01:21 PM	#5691
SGregory diyAudio Member Join Date: Apr 2003 Location: Southern Tier NY	In looking at that, I am having a hard time understanding how that would work. I would think the three error amps could fight each other and not be able to do their jobs. __________________ Living Life Doing the Waltz in 4/4 meter.

30th December 2010, 07:59 PM	#5699
nicoch58 diyAudio Member Join Date: Oct 2004	YouTube - How to play a record with no electricity 2011 project __________________ Sic58

30th December 2010, 09:10 PM	#5700
SGregory diyAudio Member Join Date: Apr 2003 Location: Southern Tier NY	You could use wool felt to set up the RIAA and control noise __________________ Living Life Doing the Waltz in 4/4 meter.

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30th December 2010, 02:33 PM	#5692
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	They are supposed to be looking on separated load nodes. Or at least that is what I thought was the idea. I would prefer to give chance to a dedicated first stage low Z active noise filter on the rail than all this complexity and dissipation non the less.

30th December 2010, 06:13 PM	#5695
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Don't know yet, I have a bunch of extremely low noise BJT types that I will have to experiment with in a future build opportunity.

30th December 2010, 06:32 PM	#5696
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	I am ready for beta testing.... please let me know if I can mod over my previous build

30th December 2010, 07:21 PM	#5698
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Its not satisfactory for Zo. Maybe to cascade 2 Sziklai buffers.