Masterpiece - Page 2 - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 24th September 2012, 09:39 PM   #11
pdul is offline pdul  Denmark
diyAudio Member
 
Join Date: Jan 2009
Location: Copenhagen
Maybe a linestage to complete the Paradise
  Reply With Quote
Old 24th September 2012, 09:41 PM   #12
pdul is offline pdul  Denmark
diyAudio Member
 
Join Date: Jan 2009
Location: Copenhagen
Maybe some jfets where p and n are more available?
  Reply With Quote
Old 24th September 2012, 09:43 PM   #13
diyAudio Member
 
Stefanoo's Avatar
 
Join Date: Apr 2006
Location: italia - ora USA -WI
Quote:
Originally Posted by RCruz View Post
This looks like two paradise boards connected at the same time to one cart side output...

Am I too far away ?
There is the caveat where the feedback connected serves to lower distortion of the two halves and also allows you to run it either SE or Bal.
Other than that it is using the basic structure of the Paradise. Servo is different to accomodate Differential outputs.
Also it is going to be 2 stage without the "boosting" capacitors and two TransZ networks for max precision and fitting standard capacitors.
__________________
Stefano
  Reply With Quote
Old 24th September 2012, 09:44 PM   #14
diyAudio Member
 
Stefanoo's Avatar
 
Join Date: Apr 2006
Location: italia - ora USA -WI
Quote:
Originally Posted by pdul View Post
Maybe a linestage to complete the Paradise
The final view or take here is that the gainstage that will be developed here for this project will be and can be used then as extension to develop a linestage and a power amp.
However, let's take one step at a time
__________________
Stefano
  Reply With Quote
Old 24th September 2012, 09:45 PM   #15
diyAudio Member
 
Stefanoo's Avatar
 
Join Date: Apr 2006
Location: italia - ora USA -WI
Quote:
Originally Posted by pdul View Post
Maybe some jfets where p and n are more available?
unfortunately not that I know of, but again there are still available k170 and j74 that can easily be had!
__________________
Stefano
  Reply With Quote
Old 24th September 2012, 09:53 PM   #16
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Ricardo, you are right. Theoretical it is possible to make a balanced stage with 4 Pardise boards and some changes. Stefanoo though has something more ambitious in his mind.
Good luck !
  Reply With Quote
Old 24th September 2012, 09:53 PM   #17
diyAudio Member
 
Stefanoo's Avatar
 
Join Date: Apr 2006
Location: italia - ora USA -WI
Here is the circuit in a SE faschion just to show how the RIAA is going to look like.
I have run frequency response's simulation and precision with this arrangement and values is over the top and like you can see it uses standard capacitors to achieve that.

Muy concern here is the noise and as the simulation shows, noise is way too high for a low noise MC amplifier.
Any input is welcome.
Attached Images
File Type: jpg SE.JPG (118.6 KB, 679 views)
File Type: jpg noise.JPG (56.3 KB, 658 views)
__________________
Stefano
  Reply With Quote
Old 24th September 2012, 10:26 PM   #18
diyAudio Member
 
Stefanoo's Avatar
 
Join Date: Apr 2006
Location: italia - ora USA -WI
Quote:
Originally Posted by Stefanoo View Post
Here is the circuit in a SE faschion just to show how the RIAA is going to look like.
I have run frequency response's simulation and precision with this arrangement and values is over the top and like you can see it uses standard capacitors to achieve that.

Muy concern here is the noise and as the simulation shows, noise is way too high for a low noise MC amplifier.
Any input is welcome.
Anybody has any input as far as output noise is concerned and/or eventual improvement to the design? Any question so far? Need output scope shots or spectral density view, distortion or anything else I can provide to get this going?
__________________
Stefano
  Reply With Quote
Old 24th September 2012, 10:28 PM   #19
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
I have to study that complex circuit in detail but i also have to prepare for a show in Venthoven this weekend. I will jump in when i find the time.
  Reply With Quote
Old 24th September 2012, 10:31 PM   #20
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Why are the 2SJ74 connected to the cascodes with the sources ?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lyra Connoisseur 4-2L SE: What a masterpiece! Sigurd Ruschkow Solid State 56 18th April 2013 09:23 PM
A new masterpiece to add to the family... Guiness Tubes / Valves 20 2nd May 2003 09:37 PM


New To Site? Need Help?

All times are GMT. The time now is 01:01 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2