Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Simplistic NJFET RIAA
Simplistic NJFET RIAA
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 20th October 2012, 07:20 PM   #8261
MASantos is offline MASantos  Portugal
diyAudio Member
 
Join Date: May 2005
Location: Lisbon Portugal
I have a goldring 1012x mm cart which has an output of 6.5mv at 5seconds which is really high. Which of the low gain versions would be more appropriate? Given the really high output of my cartridge would the 38db schematic be appropriate or could I lower the gain event further?

At the moment I use the integrated phono stage of my rega brio r amp, but I rarely pass the 10 o'clock in the volume as the overall gain is too high.
  Reply With Quote
Old 20th October 2012, 07:58 PM   #8262
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
36db-version 7,0-8,0 mA IDSS Post 417 MM 3.5mV
Attached Images
File Type: jpg simplistic 36dB.jpg (41.2 KB, 195 views)
  Reply With Quote
Old 20th October 2012, 08:11 PM   #8263
MASantos is offline MASantos  Portugal
diyAudio Member
 
Join Date: May 2005
Location: Lisbon Portugal
I've seen that one, however the 38 db one seems to have better CSS for the input transistors.
  Reply With Quote
Old 20th October 2012, 08:27 PM   #8264
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Whats your Idss SK170BL stash?
  Reply With Quote
Old 20th October 2012, 08:30 PM   #8265
MASantos is offline MASantos  Portugal
diyAudio Member
 
Join Date: May 2005
Location: Lisbon Portugal
I don't have one. I would try to get some around here if possible already matched, if not I'll buy a few dozens for matching.
  Reply With Quote
Old 20th October 2012, 10:01 PM   #8266
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
You can ask a batch of 100 to spencer here in the swap meet:

Toshiba 2SK170BL for sales
  Reply With Quote
Old 20th October 2012, 10:31 PM   #8267
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
Quote:
Originally Posted by MASantos View Post
I have a goldring 1012x mm cart which has an output of 6.5mv at 5seconds which is really high. Which of the low gain versions would be more appropriate? Given the really high output of my cartridge would the 38db schematic be appropriate or could I lower the gain event further?

At the moment I use the integrated phono stage of my rega brio r amp, but I rarely pass the 10 o'clock in the volume as the overall gain is too high.
That's a rather special category, make this one that will fit better. Your Brio R has 40dB, thus 6dB less will fare better on the volume knob.
Attached Images
File Type: png 34dBHMMSmplstc.png (24.4 KB, 185 views)
  Reply With Quote
Old 21st October 2012, 01:31 AM   #8268
MASantos is offline MASantos  Portugal
diyAudio Member
 
Join Date: May 2005
Location: Lisbon Portugal
Quote:
Originally Posted by Salas View Post
That's a rather special category, make this one that will fit better. Your Brio R has 40dB, thus 6dB less will fare better on the volume knob.
Thanks!

My tt is a rega p5 with the rb700 arm so I feel the phono stage is the bottleneck ATM.

Already sent a PM to spencer about the jfets!
  Reply With Quote
Old 21st October 2012, 01:59 AM   #8269
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
Alright, let us know if it makes a better combo because I got one too. I may make it a same stage.
Attached Images
File Type: jpg Picture 001.jpg (116.0 KB, 174 views)
  Reply With Quote
Old 21st October 2012, 10:54 AM   #8270
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
What's the specified output of the 1012?
__________________
regards Andrew T.
  Reply With Quote

Reply


Simplistic NJFET RIAAHide 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

Forum Jump


New To Site? Need Help?

All times are GMT. The time now is 10:28 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki