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 2nd June 2011, 03:10 PM   #6391
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Thank you Ricardo, I will send a PM to massimo to ask him if want some 15nF FT-1 so possible between 3 people will arrive to buy.
  Reply With Quote
Old 2nd June 2011, 03:53 PM   #6392
massimo is online now massimo  Italy
diyAudio Member
 
Join Date: Dec 2002
Location: Milan, Italy
You got a reply Felipe! (@hotmail)
  Reply With Quote
Old 2nd June 2011, 05:57 PM   #6393
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
You also have e-mail massimo.
  Reply With Quote
Old 4th June 2011, 12:29 PM   #6394
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Due to the high perfomance I want to do a new single ended Simplistic NJFET RIAA for my MM Linn K9, cart specs:

Output 4.5mV
Compliance 12Cu
Coil Inductance 400mH
Suggested load capacitance 100-200pF?

I have the following NJFET stash:

2SKJ170BL

Units Idss

2 6.60
1 6.63
1 6.64
1 6.65
1 6.66
1 6.67
1 6.69
1 6.72
3 6.73
1 6.74
1 6.75
1 6.77
1 6.78
1 6.81
1 6.83

2 7.67

2 8.16
1 8.71
1 8.80
1 8.88
1 8.98
1 8.88

LSK398BL

1 6.89 + 6.92
1 6.68 + 6.57
1 6.76 + 6.93
1 6.85 + 6.92

1 7.25 + 7.02
1 7.42 + 7.50

1 8.05 + 8.24
1 8.37 + 8.77
1 8.88 + 8.58
1 8.96 + 8.89

1 9.29 + 9.28
1 9.22 + 8.91
1 9.65 + 9.54
1 8.84 + 9.11
1 8.94 + 9.01
1 9.03 + 8.76

1 10.68 + 10.84
1 10.05 + 10.27
1 11.15 + 10.72
1 10.20 + 9.97
1 11.15 + 10.90

1 11.07 + 11.08
  Reply With Quote
Old 4th June 2011, 02:21 PM   #6395
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
There is the second values table in the PDF with 100R Rs change in first stage for 37dB, also described there. Use your 8.16mA pair in first stage, your 8.88mA pair for second, and your 8.80,8.71mA ones for buffers. I don't suggest load capacitance, I suggest you use only what the TT cable provides and a 100K quality trimmer instead of the 47K load resistor. That will give you many different alignments, very audible for MM cart to tune. Don't be afraid to try steps from 10K to full 100K.
  Reply With Quote
Old 4th June 2011, 02:51 PM   #6396
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Is this schematic changing R2 100R instead 56R also taking off 50pF Cload, right?

Click the image to open in full size.
  Reply With Quote
Old 4th June 2011, 02:53 PM   #6397
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
No, this is older. Download the updated PDF following the link from post#1.
  Reply With Quote
Old 4th June 2011, 03:07 PM   #6398
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Now all is clear I downloaded PDF from post 4945 it's OK?
  Reply With Quote
Old 4th June 2011, 03:09 PM   #6399
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Simplistic NJFET RIAA
Yes.
  Reply With Quote
Old 4th June 2011, 03:18 PM   #6400
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Perfect, now I a lot of job, thanks for support Nick.
  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 11:31 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki