Mpp - Page 286 - 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 12th October 2011, 11:37 AM   #2851
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Yes, Ricardo. The loading resistors or additional caps fit into the Neutriks. I use 2 x 300 Ohm with the Lyra Titan i and sometimes with a 1 to 10nF cap in parallel. The Rauschfrei Stage itself is factory equipped with 2 x 100kOhm. Natural input impedance is even much higher because i use J-Fets at the input that are hold under 4V from drain to source.
Under this conditions there is virtually no gate current so input impedance without loading in in the GigaOhm range, maybe even higher. This circuit could be used for brain scanners and the like to retrieve tiny signals.
  Reply With Quote
Old 12th October 2011, 11:49 AM   #2852
diyAudio Member
 
SOUND_Rays's Avatar
 
Join Date: Mar 2009
Thumbs up True "Ballanced" is the only way to the best possible sound

Quote:
Originally Posted by Joachim Gerhard View Post
The circuitry is fully balanced from input to output
Congratulation on a decision, and to unseen all hard work to achieve this final I suppose very fine sounding Vinyl playback preamplifier
All the best with it . . .

  Reply With Quote
Old 12th October 2011, 11:52 AM   #2853
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Yes, fully balanced done give the best sound in system. It is accurate and musical.
  Reply With Quote
Old 12th October 2011, 12:15 PM   #2854
diyAudio Member
 
Join Date: Dec 2000
Location: Germany
Quote:
Originally Posted by Joachim Gerhard View Post
It is now a Fet-Tube hybrid cascode like the Arthur Loesch circuit.
Original Arthur Loesch is a single WE417 in common cathode mode.

Think you are talking about Thorsten Loesch´s variations of that circuit.

Regards,
Reinhard
  Reply With Quote
Old 12th October 2011, 12:16 PM   #2855
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
Your decision to use four Riaa circuits is the best choice IMO.
__________________
RC
  Reply With Quote
Old 12th October 2011, 12:34 PM   #2856
diyAudio Member
 
Join Date: Dec 2000
Location: Germany
Morgan Jones and Allen Wright prefer single RIAA networks between phases.

Me too, for good reasons.

Reinhard
  Reply With Quote
Old 12th October 2011, 01:28 PM   #2857
RCruz is offline RCruz  Switzerland
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
Blog Entries: 1
I also prefer single Riaa passive circuits between amplifying stages but two Riaa stages per channel to create a balanced Riaa is the way to go IMO.

The only issues I see is if we need to add a sut, the loading becomes troblesome.

Hi JG... did you source the proto case from Italy ?
__________________
RC
  Reply With Quote
Old 12th October 2011, 01:57 PM   #2858
jam is offline jam  United States
diyAudio Member
 
jam's Avatar
 
Join Date: May 2001
Location: Auburn, CA, USA
Joachim,

I see you have been hard at work.....................nice job .

Regards,

Jam
  Reply With Quote
Old 12th October 2011, 02:20 PM   #2859
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
Quote:
Originally Posted by reinhard View Post
prefer single
Maybe a somewhat North-European preference ?

Me Thorens TD550 (SME312, the Nobile clone tonearm came out later), Classé Omega phono (RIAA part dual and part floating between phases), Classé Omega MKIII line, all balanced.

The Rauschfrei looks/reads very tempting.
__________________
The buck stops Here

Last edited by jacco vermeulen; 12th October 2011 at 02:25 PM.
  Reply With Quote
Old 12th October 2011, 02:43 PM   #2860
kamis is offline kamis  Serbia
diyAudio Member
 
Join Date: Mar 2006
Location: Obrenovac,Serbia
Mr. Gerhard, there is only one pair of regulators inside preamp , so it is not fully dual mono PS, which could be improved.
What is shassis material? Gold plated jumpers are better than DIP swithces for adjusting cartridge input loading.
  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



New To Site? Need Help?

All times are GMT. The time now is 01:33 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